WIP DSSS decoding
This commit is contained in:
jaseg
parent
4b419bd1ad
commit
ad9e17c35c
18 changed files with 578 additions and 31753 deletions
File diff suppressed because one or more lines are too long
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@ -1795,7 +1795,7 @@
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"name": "python",
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"nbconvert_exporter": "python",
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"pygments_lexer": "ipython3",
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"version": "3.7.5"
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"version": "3.7.6"
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}
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},
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"nbformat": 4,
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@ -46,12 +46,16 @@ FMEAS_ADC_MAX ?= 4096
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FMEAS_FFT_LEN ?= 256
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FMEAS_FFT_WINDOW ?= gaussian
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FMEAS_FFT_WINDOW_SIGMA ?= 16.0
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# TODO: validate
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FMEAS_SAMPLING_RATE ?= 10.0
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DSSS_GOLD_CODE_NBITS ?= 5
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DSSS_DECIMATION ?= 10
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DSSS_THESHOLD_FACTOR ?= 4.0f
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DSSS_WAVELET_WIDTH ?= 7.3
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DSSS_WAVELET_LUT_SIZE ?= 69
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DSSS_FILTER_FC ?= 20e-3
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DSSS_FILTER_ORDER ?= 8
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CC := $(PREFIX)gcc
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CXX := $(PREFIX)g++
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@ -122,7 +126,7 @@ LDFLAGS += -L$(OPENCM3_DIR_ABS)/lib -l$(OPENCM3_LIB) $(shell $(CC) -print-libg
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all: $(BUILDDIR)/$(BINARY)
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src/dsss_demod.c: $(BUILDDIR)/generated/dsss_gold_code.h
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src/dsss_demod.c: $(BUILDDIR)/generated/dsss_gold_code.h $(BUILDDIR)/generated/dsss_butter_filter.h
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$(BUILDDIR)/generated/dsss_gold_code.h: $(BUILDDIR)/generated/gold_code_$(DSSS_GOLD_CODE_NBITS).h
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ln -srf $< $@
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@ -139,6 +143,10 @@ $(BUILDDIR)/generated/fmeas_fft_window.c: | $(BUILDDIR)/generated
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$(BUILDDIR)/generated/dsss_cwt_wavelet.c: | $(BUILDDIR)/generated
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$(PYTHON3) tools/cwt_wavelet_header_gen.py -v dsss_cwt_wavelet_table $(DSSS_WAVELET_LUT_SIZE) $(DSSS_WAVELET_WIDTH) > $@
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.PRECIOUS: $(BUILDDIR)/generated/dsss_butter_filter.h
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$(BUILDDIR)/generated/dsss_butter_filter.h: | $(BUILDDIR)/generated
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$(PYTHON3) tools/butter_filter_gen.py -m dsss_filter $(DSSS_FILTER_FC) $(FMEAS_SAMPLING_RATE) $(DSSS_FILTER_ORDER) > $@
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$(BUILDDIR)/generated: ; mkdir -p $@
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OBJS := $(addprefix $(BUILDDIR)/,$(C_SOURCES:.c=.o) $(CXX_SOURCES:.cpp=.o))
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@ -1 +1 @@
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Subproject commit 6a86f4ca00d2b96b82879e1e5bd9e89c5750dd22
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Subproject commit 4a65d88011a1595b7c8b42fa0d70b7bdfc132acc
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@ -1 +1 @@
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Subproject commit afae623190f025e7cf2fb0222bfe796b69a36941
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Subproject commit a0a8706c9dc9e43bc51d16334cd6c0f6ae084ce9
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@ -11,17 +11,14 @@
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#include "simulation.h"
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#include "generated/dsss_gold_code.h"
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#include "generated/dsss_butter_filter.h"
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/* Generated CWT wavelet LUT */
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extern const float * const dsss_cwt_wavelet_table;
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struct iir_biquad cwt_filter_bq[3] = {
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{.a = {-1.993939440f, 0.993949280f}, .b = {0.2459934300683e-5, 0.4919868601367e-5, 0.2459934300683e-5}},
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{.a = {-1.995557124f, 0.995566972f}, .b = {0.2461930046414e-5, 0.4923860092828e-5, 0.2461930046414e-5}},
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{.a = {-1.998365254f, 0.998375115f}, .b = {0.2465394452097e-5, 0.4930788904195e-5, 0.2465394452097e-5}},
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};
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struct iir_biquad cwt_filter_bq[DSSS_FILTER_CLEN] = {DSSS_FILTER_COEFF};
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float gold_correlate_step(const size_t ncode, const float a[DSSS_CORRELATION_LENGTH], size_t offx);
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float gold_correlate_step(const size_t ncode, const float a[DSSS_CORRELATION_LENGTH], size_t offx, bool debug);
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float cwt_convolve_step(const float v[DSSS_WAVELET_LUT_SIZE], size_t offx);
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float run_iir(const float x, const int order, const struct iir_biquad q[order], struct iir_biquad_state st[order]);
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float run_biquad(float x, const struct iir_biquad *const q, struct iir_biquad_state *const restrict st);
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@ -34,7 +31,7 @@ void dsss_demod_step(struct dsss_demod_state *st, float new_value) {
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//#define DEBUG_PRINT(...) ((void)0)
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//#define DEBUG_PRINTN(...) ((void)0)
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bool debug = sim_pos % DSSS_CORRELATION_LENGTH == 0;
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bool debug = sim_pos % DSSS_CORRELATION_LENGTH == DSSS_CORRELATION_LENGTH-1;
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if (debug) DEBUG_PRINT("Iteration %zd", sim_pos);
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//const float peak_group_threshold = 0.05 * DSSS_CORRELATION_LENGTH;
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//const float hole_patching_threshold = 0.01 * DSSS_CORRELATION_LENGTH;
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@ -45,14 +42,14 @@ void dsss_demod_step(struct dsss_demod_state *st, float new_value) {
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/* use new, incremented wpos for gold_correlate_step as first element of old data in ring buffer */
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for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
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st->correlation[i][st->correlation_wpos] = gold_correlate_step(i, st->signal, st->correlation_wpos);
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st->correlation[i][st->correlation_wpos] = gold_correlate_step(i, st->signal, st->signal_wpos, debug);
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/* debug */
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/*
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DEBUG_PRINTN(" correlation: [");
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for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
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DEBUG_PRINTN("%f, ", st->correlation[i][st->correlation_wpos]);
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DEBUG_PRINTN("]\n");
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*/
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if (debug) {
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DEBUG_PRINTN(" correlation: [");
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for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
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DEBUG_PRINTN("%f, ", st->correlation[i][st->correlation_wpos]);
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DEBUG_PRINTN("]\n");
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}
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/* end */
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st->correlation_wpos = (st->correlation_wpos + 1) % ARRAY_LENGTH(st->correlation[0]);
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@ -60,10 +57,12 @@ void dsss_demod_step(struct dsss_demod_state *st, float new_value) {
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for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
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cwt[i] = cwt_convolve_step(st->correlation[i], st->correlation_wpos);
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/* debug */
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/*
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if (debug) DEBUG_PRINTN(" cwt: [");
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for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++)
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if (debug) DEBUG_PRINTN("%f, ", cwt[i]);
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if (debug) DEBUG_PRINTN("]\n");
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*/
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/* end */
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float avg[DSSS_GOLD_CODE_COUNT];
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@ -82,10 +81,10 @@ void dsss_demod_step(struct dsss_demod_state *st, float new_value) {
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int max_ch = st->group.max_ch;
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int max_idx = st->group.max_idx + 1;
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bool found = false;
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if (debug) DEBUG_PRINTN(" rel: [");
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//if (debug) DEBUG_PRINTN(" rel: [");
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for (size_t i=0; i<DSSS_GOLD_CODE_COUNT; i++) {
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float val = cwt[i] / avg[i];
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if (debug) DEBUG_PRINTN("%f, ", val);
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//if (debug) DEBUG_PRINTN("%f, ", val);
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if (fabs(val) > DSSS_THESHOLD_FACTOR)
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found = true;
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@ -96,7 +95,7 @@ void dsss_demod_step(struct dsss_demod_state *st, float new_value) {
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max_idx = st->group.len;
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}
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}
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if (debug) DEBUG_PRINTN("]\n");
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//if (debug) DEBUG_PRINTN("]\n");
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/* debug */
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if (debug) DEBUG_PRINT(" found=%d len=%d idx=%d ch=%d max=%f",
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@ -162,19 +161,27 @@ float cwt_convolve_step(const float v[DSSS_WAVELET_LUT_SIZE], size_t offx) {
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*
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* [0] https://docs.scipy.org/doc/numpy/reference/generated/numpy.correlate.html
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*/
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float gold_correlate_step(const size_t ncode, const float a[DSSS_CORRELATION_LENGTH], size_t offx) {
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float gold_correlate_step(const size_t ncode, const float a[DSSS_CORRELATION_LENGTH], size_t offx, bool debug) {
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float acc_outer = 0.0f;
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uint8_t table_byte = 0;
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for (size_t i=0, pos=0; i<DSSS_GOLD_CODE_LENGTH; i++, pos += DSSS_DECIMATION) {
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float acc_inner = 0.0f;
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for (size_t j=0; j<DSSS_DECIMATION; j++) {
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if ((pos&7) == 0)
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table_byte = dsss_gold_code_table[ncode][pos>>3]; /* Fetch sequence table item */
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int bv = table_byte & (1<<(pos&7)); /* Extract bit */
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bv = !!bv*2 - 1; /* Map 0, 1 -> -1, 1 */
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acc_inner += a[(offx + i + j) % DSSS_CORRELATION_LENGTH] * bv; /* Multiply item */
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if (debug) DEBUG_PRINTN("Correlate n=%d: ", ncode);
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for (size_t i=0; i<DSSS_GOLD_CODE_LENGTH; i++) {
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if ((i&7) == 0) {
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table_byte = dsss_gold_code_table[ncode][i>>3]; /* Fetch sequence table item */
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if (debug) DEBUG_PRINTN("|");
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}
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acc_outer += acc_inner;
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int bv = table_byte & (0x80>>(i&7)); /* Extract bit */
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bv = !!bv*2 - 1; /* Map 0, 1 -> -1, 1 */
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if (debug) DEBUG_PRINTN("%s%d\033[0m", bv == 1 ? "\033[92m" : "\033[91m", (bv+1)/2);
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float acc_inner = 0.0f;
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for (size_t j=0; j<DSSS_DECIMATION; j++)
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acc_inner += a[(offx + i*DSSS_DECIMATION + j) % DSSS_CORRELATION_LENGTH]; /* Multiply item */
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//if (debug) DEBUG_PRINTN("%.2f ", acc_inner);
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acc_outer += acc_inner * bv;
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}
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if (debug) DEBUG_PRINTN("\n");
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return acc_outer / DSSS_CORRELATION_LENGTH;
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}
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50
controller/fw/tools/butter_filter_gen.py
Normal file
50
controller/fw/tools/butter_filter_gen.py
Normal file
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@ -0,0 +1,50 @@
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#!/usr/bin/env python3
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import sys
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import contextlib
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import scipy.signal as sig
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@contextlib.contextmanager
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def wrap(left='{', right='}', file=None, end=''):
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print(left, file=file, end=end)
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yield
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print(right, file=file, end=end)
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@contextlib.contextmanager
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def print_include_guards(macro_name):
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print(f'#ifndef {macro_name}')
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print(f'#define {macro_name}')
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yield
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print(f'#endif /* {macro_name} */')
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macro_float = lambda f: f'{f}'.replace('.', 'F').replace('-', 'N').replace('+', 'P')
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if __name__ == '__main__':
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import argparse
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parser = argparse.ArgumentParser()
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parser.add_argument('-m', '--macro-name', default='butter_filter', help='Prefix for output macro names')
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parser.add_argument('fc', type=float, help='Corner frequency [Hz]')
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parser.add_argument('fs', type=float, help='Sampling rate [Hz]')
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parser.add_argument('n', type=int, nargs='?', default=6, help='Filter order')
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args = parser.parse_args()
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sos = sig.butter(args.n, args.fc, fs=args.fs, output='sos')
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print('/* THIS IS A GENERATED FILE. DO NOT EDIT! */')
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with print_include_guards(f'__BUTTER_FILTER_GENERATED_{args.n}_{macro_float(args.fc)}_{macro_float(args.fs)}__'):
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print(f'#define {args.macro_name.upper()}_ORDER {args.n}')
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print(f'#define {args.macro_name.upper()}_CLEN {(args.n+1)//2}')
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print(f'#define {args.macro_name.upper()}_COEFF ', end='')
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for sec in sos:
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with wrap():
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print('.b=', end='')
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with wrap():
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print(', '.join(f'{v}' for v in sec[:3]), end='')
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print(', .a=', end='')
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with wrap():
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print(', '.join(f'{v}' for v in sec[4:6]), end='')
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print(', ', end='')
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print()
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@ -58,19 +58,13 @@ if __name__ == '__main__':
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print(f' *')
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print(f' * Each code is packed left-aligned into {nbytes} bytes in big-endian byte order.')
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print(f' */')
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print(f'const uint8_t gold_code_{args.n}bit[{2**args.n+1}][{nbytes}] = {{')
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print(f'const uint8_t {args.variable}[{2**args.n+1}][{nbytes}] = {{')
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for i, code in enumerate(gold(args.n)):
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par = '{' + ' '.join(f'0x{d:02x},' for d in np.packbits(code)) + f'}}, /* {i: 3d} "{"".join(str(x) for x in code)}" */'
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print(textwrap.fill(par, initial_indent=' '*4, subsequent_indent=' '*4, width=120))
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print('};')
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print()
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print(f'const uint8_t * const {args.variable} __attribute__((weak)) = (uint8_t *const)gold_code_{args.n}bit;')
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print(f'const size_t {args.variable}_nbits __attribute__((weak)) = {args.n};')
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else:
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print('/* THIS IS A GENERATED FILE. DO NOT EDIT! */')
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with print_include_guards(f'__GOLD_CODE_GENERATED_HEADER_{args.n}__'):
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print(f'extern const uint8_t gold_code_{args.n}bit[{2**args.n+1}][{nbytes}];')
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with print_include_guards(f'__GOLD_CODE_GENERATED_HEADER_GLOBAL_SYM_{args.variable.upper()}__'):
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print(f'extern const uint8_t {args.variable}[{2**args.n+1}][{nbytes}];')
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print(f'extern const size_t {args.variable}_nbits;')
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@ -2380,6 +2380,373 @@
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<value>-1</value>
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</param>
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</block>
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<block>
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<key>qtgui_time_sink_x</key>
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<param>
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<key>autoscale</key>
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<value>True</value>
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</param>
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<param>
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<key>axislabels</key>
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<value>True</value>
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</param>
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<param>
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<key>alias</key>
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<value></value>
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</param>
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<param>
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<key>comment</key>
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<value></value>
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</param>
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<param>
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<key>ctrlpanel</key>
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<value>False</value>
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</param>
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<param>
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<key>affinity</key>
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<value></value>
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</param>
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<param>
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<key>entags</key>
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<value>True</value>
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</param>
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<param>
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<key>_enabled</key>
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<value>1</value>
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</param>
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<param>
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<key>_coordinate</key>
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<value>(1144, 16)</value>
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</param>
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<param>
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<key>gui_hint</key>
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<value></value>
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</param>
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<param>
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<key>_rotation</key>
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<value>90</value>
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</param>
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<param>
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<key>grid</key>
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<value>False</value>
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</param>
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<param>
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<key>id</key>
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<value>qtgui_time_sink_x_0_1_0</value>
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</param>
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<param>
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<key>legend</key>
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<value>True</value>
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</param>
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<param>
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<key>alpha1</key>
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<value>1.0</value>
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</param>
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<param>
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<key>color1</key>
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<value>"blue"</value>
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</param>
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<param>
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<key>label1</key>
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<value></value>
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</param>
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<param>
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<key>marker1</key>
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<value>-1</value>
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</param>
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<param>
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<key>style1</key>
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<value>1</value>
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</param>
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<param>
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<key>width1</key>
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<value>1</value>
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</param>
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<param>
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<key>alpha10</key>
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<value>1.0</value>
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</param>
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<param>
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<key>color10</key>
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<value>"blue"</value>
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</param>
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<param>
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<key>label10</key>
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<value></value>
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</param>
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<param>
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<key>marker10</key>
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<value>-1</value>
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</param>
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<param>
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<key>style10</key>
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<value>1</value>
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</param>
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<param>
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<key>width10</key>
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<value>1</value>
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</param>
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<param>
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<key>alpha2</key>
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<value>1.0</value>
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</param>
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<param>
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<key>color2</key>
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<value>"red"</value>
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</param>
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<param>
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<key>label2</key>
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<value></value>
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</param>
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<param>
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<key>marker2</key>
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<value>-1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>style2</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>width2</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alpha3</key>
|
||||
<value>1.0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>color3</key>
|
||||
<value>"green"</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>label3</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>marker3</key>
|
||||
<value>-1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>style3</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>width3</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alpha4</key>
|
||||
<value>1.0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>color4</key>
|
||||
<value>"black"</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>label4</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>marker4</key>
|
||||
<value>-1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>style4</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>width4</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alpha5</key>
|
||||
<value>1.0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>color5</key>
|
||||
<value>"cyan"</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>label5</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>marker5</key>
|
||||
<value>-1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>style5</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>width5</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alpha6</key>
|
||||
<value>1.0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>color6</key>
|
||||
<value>"magenta"</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>label6</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>marker6</key>
|
||||
<value>-1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>style6</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>width6</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alpha7</key>
|
||||
<value>1.0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>color7</key>
|
||||
<value>"yellow"</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>label7</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>marker7</key>
|
||||
<value>-1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>style7</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>width7</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alpha8</key>
|
||||
<value>1.0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>color8</key>
|
||||
<value>"dark red"</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>label8</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>marker8</key>
|
||||
<value>-1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>style8</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>width8</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>alpha9</key>
|
||||
<value>1.0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>color9</key>
|
||||
<value>"dark green"</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>label9</key>
|
||||
<value></value>
|
||||
</param>
|
||||
<param>
|
||||
<key>marker9</key>
|
||||
<value>-1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>style9</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>width9</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>name</key>
|
||||
<value>"mod"</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>nconnections</key>
|
||||
<value>3</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>size</key>
|
||||
<value>19500</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>srate</key>
|
||||
<value>samp_rate</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>stemplot</key>
|
||||
<value>False</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>tr_chan</key>
|
||||
<value>0</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>tr_delay</key>
|
||||
<value>0.007</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>tr_level</key>
|
||||
<value>0.1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>tr_mode</key>
|
||||
<value>qtgui.TRIG_MODE_TAG</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>tr_slope</key>
|
||||
<value>qtgui.TRIG_SLOPE_POS</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>tr_tag</key>
|
||||
<value>"start"</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>type</key>
|
||||
<value>complex</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>update_time</key>
|
||||
<value>0.10</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>ylabel</key>
|
||||
<value>Amplitude</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>yunit</key>
|
||||
<value>""</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>ymax</key>
|
||||
<value>1</value>
|
||||
</param>
|
||||
<param>
|
||||
<key>ymin</key>
|
||||
<value>-1</value>
|
||||
</param>
|
||||
</block>
|
||||
<block>
|
||||
<key>parameter</key>
|
||||
<param>
|
||||
|
|
@ -2481,6 +2848,24 @@
|
|||
<source_key>0</source_key>
|
||||
<sink_key>2</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>blocks_float_to_complex_0</source_block_id>
|
||||
<sink_block_id>qtgui_time_sink_x_0_1_0</sink_block_id>
|
||||
<source_key>0</source_key>
|
||||
<sink_key>0</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>blocks_float_to_complex_0</source_block_id>
|
||||
<sink_block_id>qtgui_time_sink_x_0_1_0</sink_block_id>
|
||||
<source_key>0</source_key>
|
||||
<sink_key>1</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>blocks_float_to_complex_0</source_block_id>
|
||||
<sink_block_id>qtgui_time_sink_x_0_1_0</sink_block_id>
|
||||
<source_key>0</source_key>
|
||||
<sink_key>2</sink_key>
|
||||
</connection>
|
||||
<connection>
|
||||
<source_block_id>blocks_multiply_const_vxx_1</source_block_id>
|
||||
<sink_block_id>blocks_add_const_vxx_1</sink_block_id>
|
||||
|
|
|
|||
|
|
@ -898,7 +898,7 @@
|
|||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.7.5"
|
||||
"version": "3.7.6"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
|
|
|
|||
|
|
@ -125,7 +125,7 @@
|
|||
{
|
||||
"data": {
|
||||
"application/vnd.jupyter.widget-view+json": {
|
||||
"model_id": "ba042a79e76742dfae88bd0a5913cb1f",
|
||||
"model_id": "afc732c0ada8419e89a7ff2551212c00",
|
||||
"version_major": 2,
|
||||
"version_minor": 0
|
||||
},
|
||||
|
|
@ -196,7 +196,7 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 124,
|
||||
"execution_count": 8,
|
||||
"metadata": {
|
||||
"scrolled": false
|
||||
},
|
||||
|
|
@ -1045,7 +1045,7 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 46,
|
||||
"execution_count": 10,
|
||||
"metadata": {
|
||||
"scrolled": false
|
||||
},
|
||||
|
|
@ -1858,7 +1858,7 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 12,
|
||||
"execution_count": 11,
|
||||
"metadata": {
|
||||
"scrolled": false
|
||||
},
|
||||
|
|
@ -1866,7 +1866,7 @@
|
|||
{
|
||||
"data": {
|
||||
"application/vnd.jupyter.widget-view+json": {
|
||||
"model_id": "bb14b5b4747148898f1d8f046318bb55",
|
||||
"model_id": "36ffcac30c8b4b378d3c422d3ef0698b",
|
||||
"version_major": 2,
|
||||
"version_minor": 0
|
||||
},
|
||||
|
|
@ -1937,7 +1937,7 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 119,
|
||||
"execution_count": 12,
|
||||
"metadata": {
|
||||
"scrolled": false
|
||||
},
|
||||
|
|
@ -2773,7 +2773,7 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 115,
|
||||
"execution_count": 13,
|
||||
"metadata": {
|
||||
"scrolled": false
|
||||
},
|
||||
|
|
@ -3637,7 +3637,7 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 127,
|
||||
"execution_count": 14,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
|
|
@ -3656,22 +3656,22 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 128,
|
||||
"execution_count": 17,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"text/plain": [
|
||||
"54.0"
|
||||
"(160118,)"
|
||||
]
|
||||
},
|
||||
"execution_count": 128,
|
||||
"execution_count": 17,
|
||||
"metadata": {},
|
||||
"output_type": "execute_result"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"27000 * 2e-3"
|
||||
"def modulate(sequences, data)"
|
||||
]
|
||||
}
|
||||
],
|
||||
|
|
|
|||
|
|
@ -73,11 +73,11 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 5,
|
||||
"execution_count": 19,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"def modulate(data, nbits=5):\n",
|
||||
"def modulate(data, nbits=5, pad=True):\n",
|
||||
" # 0, 1 -> -1, 1\n",
|
||||
" mask = np.array(gold(nbits))*2 - 1\n",
|
||||
" \n",
|
||||
|
|
@ -85,7 +85,10 @@
|
|||
" data_lsb_centered = ((data&1)*2 - 1)\n",
|
||||
"\n",
|
||||
" signal = (np.multiply(sel, np.tile(data_lsb_centered, (2**nbits-1, 1)).T).flatten() + 1) // 2\n",
|
||||
" return np.hstack([ np.zeros(len(mask)), signal, np.zeros(len(mask)) ])"
|
||||
" if pad:\n",
|
||||
" return np.hstack([ np.zeros(len(mask)), signal, np.zeros(len(mask)) ])\n",
|
||||
" else:\n",
|
||||
" return signal"
|
||||
]
|
||||
},
|
||||
{
|
||||
|
|
@ -124,7 +127,7 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 8,
|
||||
"execution_count": 21,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
|
|
@ -139,18 +142,19 @@
|
|||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 73,
|
||||
"execution_count": 26,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
"test_duration = 300\n",
|
||||
"test_duration = 200\n",
|
||||
"test_nbits = 5\n",
|
||||
"test_signal_amplitude=2.0e-3\n",
|
||||
"test_decimation=10\n",
|
||||
"\n",
|
||||
"for test_signal_amplitude in [2.0e-3, 20e-3, 200e-3, 2]:\n",
|
||||
" test_data = np.random.RandomState(seed=0).randint(0, 2 * (2**test_nbits), test_duration)\n",
|
||||
" signal = np.repeat(modulate(test_data, test_nbits) * 2.0 - 1, test_decimation) * test_signal_amplitude\n",
|
||||
" #test_data = np.array([0, 1, 2, 3] * 50)\n",
|
||||
" signal = np.repeat(modulate(test_data, test_nbits, pad=False) * 2.0 - 1, test_decimation) * test_signal_amplitude\n",
|
||||
" with open(f'dsss_test_signals/dsss_test_noiseless_{test_signal_amplitude*1000:.0f}mHz.bin', 'wb') as f:\n",
|
||||
" for e in signal:\n",
|
||||
" f.write(struct.pack('<f', e))"
|
||||
|
|
@ -1174,9 +1178,9 @@
|
|||
],
|
||||
"metadata": {
|
||||
"kernelspec": {
|
||||
"display_name": "labenv",
|
||||
"display_name": "winlabenv",
|
||||
"language": "python",
|
||||
"name": "labenv"
|
||||
"name": "winlabenv"
|
||||
},
|
||||
"language_info": {
|
||||
"codemirror_mode": {
|
||||
|
|
@ -1188,7 +1192,7 @@
|
|||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.8.1"
|
||||
"version": "3.7.6"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
|
|
|
|||
Binary file not shown.
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File diff suppressed because it is too large
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File diff suppressed because one or more lines are too long
|
|
@ -722,9 +722,9 @@
|
|||
],
|
||||
"metadata": {
|
||||
"kernelspec": {
|
||||
"display_name": "labenv",
|
||||
"display_name": "winlabenv",
|
||||
"language": "python",
|
||||
"name": "labenv"
|
||||
"name": "winlabenv"
|
||||
},
|
||||
"language_info": {
|
||||
"codemirror_mode": {
|
||||
|
|
@ -736,7 +736,7 @@
|
|||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.8.1"
|
||||
"version": "3.7.6"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
|
|
|
|||
|
|
@ -2,7 +2,7 @@
|
|||
"cells": [
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 3,
|
||||
"execution_count": 2,
|
||||
"metadata": {},
|
||||
"outputs": [],
|
||||
"source": [
|
||||
|
|
@ -10,7 +10,9 @@
|
|||
"\n",
|
||||
"import numpy as np\n",
|
||||
"from matplotlib import pyplot as plt\n",
|
||||
"import matplotlib"
|
||||
"import matplotlib\n",
|
||||
"\n",
|
||||
"import scipy.signal as sig"
|
||||
]
|
||||
},
|
||||
{
|
||||
|
|
@ -141,13 +143,40 @@
|
|||
" ax.text(0.2, 0.2, f'mean={mean:.3}Hz, rms={rms*1e3:.3}mHz', ha='center', va='center', transform=ax.transAxes,\n",
|
||||
" bbox=dict(boxstyle=\"square\", ec=(0,0,0,0), fc=(1,1,1,0.8)))"
|
||||
]
|
||||
},
|
||||
{
|
||||
"cell_type": "code",
|
||||
"execution_count": 3,
|
||||
"metadata": {},
|
||||
"outputs": [
|
||||
{
|
||||
"data": {
|
||||
"text/plain": [
|
||||
"array([[ 2.35232554e-18, 4.70465108e-18, 2.35232554e-18,\n",
|
||||
" 1.00000000e+00, -1.97549493e+00, 9.75650918e-01],\n",
|
||||
" [ 1.00000000e+00, 2.00000000e+00, 1.00000000e+00,\n",
|
||||
" 1.00000000e+00, -1.97916324e+00, 9.79319515e-01],\n",
|
||||
" [ 1.00000000e+00, 2.00000000e+00, 1.00000000e+00,\n",
|
||||
" 1.00000000e+00, -1.98597735e+00, 9.86134166e-01],\n",
|
||||
" [ 1.00000000e+00, 2.00000000e+00, 1.00000000e+00,\n",
|
||||
" 1.00000000e+00, -1.99495144e+00, 9.95108965e-01]])"
|
||||
]
|
||||
},
|
||||
"execution_count": 3,
|
||||
"metadata": {},
|
||||
"output_type": "execute_result"
|
||||
}
|
||||
],
|
||||
"source": [
|
||||
"sig.butter(8, 20e-3, output='sos', fs=10.0)"
|
||||
]
|
||||
}
|
||||
],
|
||||
"metadata": {
|
||||
"kernelspec": {
|
||||
"display_name": "labenv",
|
||||
"display_name": "winlabenv",
|
||||
"language": "python",
|
||||
"name": "labenv"
|
||||
"name": "winlabenv"
|
||||
},
|
||||
"language_info": {
|
||||
"codemirror_mode": {
|
||||
|
|
@ -159,7 +188,7 @@
|
|||
"name": "python",
|
||||
"nbconvert_exporter": "python",
|
||||
"pygments_lexer": "ipython3",
|
||||
"version": "3.8.1"
|
||||
"version": "3.7.6"
|
||||
}
|
||||
},
|
||||
"nbformat": 4,
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue