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Merge pull request #724 from cjcliffe/liquid_dsp_ampmodem_update

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Liquid dsp ampmodem/firhilbf update-related changes
This commit is contained in:
Charles J. Cliffe 2019-04-17 22:04:38 -04:00 committed by GitHub
commit d43f30f0c7
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18 changed files with 4978 additions and 4875 deletions
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external/liquid-dsp/include/liquid/liquid.h vendored
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@ -216,6 +216,16 @@ float AGC(_get_gain)(AGC() _q); \
void AGC(_set_gain)(AGC() _q, \
float _gain); \
\
/* Get the ouput scaling applied to each sample (linear). */ \
float AGC(_get_scale)(AGC() _q); \
\
/* Set the agc object's output scaling (linear). Note that this does */ \
/* affect the response of the AGC. */ \
/* _q : automatic gain control object */ \
/* _gain : gain to apply to input signal, _gain > 0 */ \
void AGC(_set_scale)(AGC() _q, \
float _scale); \
\
/* Estimate signal level and initialize internal gain on an input */ \
/* array. */ \
/* _q : automatic gain control object */ \
@ -1996,6 +2006,14 @@ void liquid_firdes_kaiser(unsigned int _n,
float _mu,
float *_h);
// Design finite impulse response DC-blocking filter
// _m : filter semi-length, m in [1,1000]
// _As : stop-band attenuation [dB], _As > 0
// _h : output coefficient buffer, [size: 2*_m+1 x 1]
void liquid_firdes_dcblocker(unsigned int _m,
float _As,
float * _h);
// Design FIR doppler filter
// _n : filter length
// _fd : normalized doppler frequency (0 < _fd < 0.5)
@ -2482,6 +2500,12 @@ FIRFILT() FIRFILT(_create_rnyquist)(int _type, \
/* _n : length of filter [samples], 0 < _n <= 1024 */ \
FIRFILT() FIRFILT(_create_rect)(unsigned int _n); \
\
/* Create DC blocking filter from prototype */ \
/* _m : prototype filter semi-length such that filter length is 2*m+1 */ \
/* _As : prototype filter stop-band attenuation [dB], _As > 0 */ \
FIRFILT() FIRFILT(_create_dc_blocker)(unsigned int _m, \
float _As); \
\
/* Re-create filter object of potentially a different length with */ \
/* different coefficients. If the length of the filter does not change, */ \
/* not memory reallocation is invoked. */ \
@ -2625,10 +2649,12 @@ void FIRHILB(_r2c_execute)(FIRHILB() _q, \
/* Execute Hilbert transform (complex to real) */ \
/* _q : Hilbert transform object */ \
/* _x : complex-valued input sample */ \
/* _y : real-valued output sample */ \
/* _y0 : real-valued output sample, lower side-band retained */ \
/* _y1 : real-valued output sample, upper side-band retained */ \
void FIRHILB(_c2r_execute)(FIRHILB() _q, \
TC _x, \
T * _y); \
T * _y0, \
T * _y1); \
\
/* Execute Hilbert transform decimator (real to complex) */ \
/* _q : Hilbert transform object */ \
@ -3671,6 +3697,17 @@ LIQUID_RESAMP2_DEFINE_API(LIQUID_RESAMP2_MANGLE_CCCF,
/* Rational rate resampler, implemented as a polyphase filterbank */ \
typedef struct RRESAMP(_s) * RRESAMP(); \
\
/* Create rational-rate resampler object from external coeffcients to */ \
/* resample at an exact rate P/Q */ \
/* _P : interpolation factor, P > 0 */ \
/* _Q : decimation factor, Q > 0 */ \
/* _m : filter semi-length (delay), 0 < _m */ \
/* _h : filter coefficients, [size: 2*_P*_m x 1] */ \
RRESAMP() RRESAMP(_create)(unsigned int _P, \
unsigned int _Q, \
unsigned int _m, \
TC * _h); \
\
/* Create rational-rate resampler object from filter prototype to */ \
/* resample at an exact rate P/Q */ \
/* _P : interpolation factor, P > 0 */ \
@ -3678,11 +3715,18 @@ typedef struct RRESAMP(_s) * RRESAMP(); \
/* _m : filter semi-length (delay), 0 < _m */ \
/* _bw : filter bandwidth relative to sample rate, 0 < _bw <= 0.5 */ \
/* _As : filter stop-band attenuation [dB], 0 < _As */ \
RRESAMP() RRESAMP(_create)(unsigned int _P, \
unsigned int _Q, \
unsigned int _m, \
float _bw, \
float _As); \
RRESAMP() RRESAMP(_create_kaiser)(unsigned int _P, \
unsigned int _Q, \
unsigned int _m, \
float _bw, \
float _As); \
\
/* Create rational-rate resampler object from filter prototype to... */ \
RRESAMP() RRESAMP(_create_prototype)(int _type, \
unsigned int _P, \
unsigned int _Q, \
unsigned int _m, \
float _beta); \
\
/* Create rational resampler object with a specified resampling rate of */ \
/* exactly P/Q with default parameters. This is a simplified method to */ \
@ -5117,6 +5161,9 @@ float ofdmflexframesync_get_rssi(ofdmflexframesync _q);
// query the received carrier offset estimate
float ofdmflexframesync_get_cfo(ofdmflexframesync _q);
// set the received carrier offset estimate
void ofdmflexframesync_set_cfo(ofdmflexframesync _q, float _cfo);
// enable/disable debugging
void ofdmflexframesync_debug_enable(ofdmflexframesync _q);
void ofdmflexframesync_debug_disable(ofdmflexframesync _q);
@ -7089,42 +7136,44 @@ typedef struct ampmodem_s * ampmodem;
// create ampmodem object
// _m : modulation index
// _fc : carrier frequency, range: [-0.5,0.5]
// _type : AM type (e.g. LIQUID_AMPMODEM_DSB)
// _suppressed_carrier : carrier suppression flag
ampmodem ampmodem_create(float _m,
float _fc,
ampmodem ampmodem_create(float _mod_index,
liquid_ampmodem_type _type,
int _suppressed_carrier);
int _suppressed_carrier);
// destroy ampmodem object
void ampmodem_destroy(ampmodem _fm);
void ampmodem_destroy(ampmodem _q);
// print ampmodem object internals
void ampmodem_print(ampmodem _fm);
void ampmodem_print(ampmodem _q);
// reset ampmodem object state
void ampmodem_reset(ampmodem _fm);
void ampmodem_reset(ampmodem _q);
// accessor methods
unsigned int ampmodem_get_delay_mod (ampmodem _q);
unsigned int ampmodem_get_delay_demod(ampmodem _q);
// modulate sample
void ampmodem_modulate(ampmodem _fm,
float _x,
liquid_float_complex *_y);
void ampmodem_modulate(ampmodem _q,
float _x,
liquid_float_complex * _y);
void ampmodem_modulate_block(ampmodem _q,
float * _m,
unsigned int _n,
liquid_float_complex *_s);
void ampmodem_modulate_block(ampmodem _q,
float * _m,
unsigned int _n,
liquid_float_complex * _s);
// demodulate sample
void ampmodem_demodulate(ampmodem _fm,
void ampmodem_demodulate(ampmodem _q,
liquid_float_complex _y,
float *_x);
float * _x);
void ampmodem_demodulate_block(ampmodem _q,
void ampmodem_demodulate_block(ampmodem _q,
liquid_float_complex * _r,
unsigned int _n,
float * _m);
unsigned int _n,
float * _m);
//
// MODULE : multichannel
@ -7471,6 +7520,9 @@ void ofdmframesync_execute(ofdmframesync _q,
float ofdmframesync_get_rssi(ofdmframesync _q); // received signal strength indication
float ofdmframesync_get_cfo(ofdmframesync _q); // carrier offset estimate
// set methods
void ofdmframesync_set_cfo(ofdmframesync _q, float _cfo); // set carrier offset estimate
// debugging
void ofdmframesync_debug_enable(ofdmframesync _q);
void ofdmframesync_debug_disable(ofdmframesync _q);

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@ -840,6 +840,7 @@ src/modem/src/modem_arb_const.o : %.o : %.c $(include_headers)
modem_autotests := \
src/modem/tests/ampmodem_autotest.c \
src/modem/tests/cpfskmodem_autotest.c \
src/modem/tests/freqmodem_autotest.c \
src/modem/tests/fskmodem_autotest.c \
@ -1426,6 +1427,7 @@ example_programs := \
examples/firfarrow_rrrf_example \
examples/firfilt_cccf_example \
examples/firfilt_crcf_example \
examples/firfilt_crcf_dcblocker_example \
examples/firfilt_rrrf_example \
examples/firdes_kaiser_example \
examples/firdespm_callback_example \
@ -1555,6 +1557,10 @@ clean-examples:
# NOTE: sandbox _requires_ fftw3 to build
.PHONY: sandbox
sandbox_programs = \
sandbox/am_demod_dsb_peak_detect_test \
sandbox/am_demod_dsb_pll_carrier_test \
sandbox/am_demod_dsb_pll_costas_test \
sandbox/am_demod_ssb_pll_carrier_test \
sandbox/bpresync_test \
sandbox/cpmodem_test \
sandbox/count_ones_gentab \
@ -1599,6 +1605,7 @@ sandbox_programs = \
sandbox/firdes_gmskrx_test \
sandbox/firdes_length_test \
sandbox/firfarrow_rrrf_test \
sandbox/firfilt_dcblocker_test \
sandbox/firpfbch_analysis_alignment_test \
sandbox/firpfbch2_analysis_equivalence_test \
sandbox/firpfbch2_test \

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@ -840,6 +840,7 @@ src/modem/src/modem_arb_const.o : %.o : %.c $(include_headers)
modem_autotests := \
src/modem/tests/ampmodem_autotest.c \
src/modem/tests/cpfskmodem_autotest.c \
src/modem/tests/freqmodem_autotest.c \
src/modem/tests/fskmodem_autotest.c \
@ -1426,6 +1427,7 @@ example_programs := \
examples/firfarrow_rrrf_example \
examples/firfilt_cccf_example \
examples/firfilt_crcf_example \
examples/firfilt_crcf_dcblocker_example \
examples/firfilt_rrrf_example \
examples/firdes_kaiser_example \
examples/firdespm_callback_example \
@ -1555,6 +1557,10 @@ clean-examples:
# NOTE: sandbox _requires_ fftw3 to build
.PHONY: sandbox
sandbox_programs = \
sandbox/am_demod_dsb_peak_detect_test \
sandbox/am_demod_dsb_pll_carrier_test \
sandbox/am_demod_dsb_pll_costas_test \
sandbox/am_demod_ssb_pll_carrier_test \
sandbox/bpresync_test \
sandbox/cpmodem_test \
sandbox/count_ones_gentab \
@ -1599,6 +1605,7 @@ sandbox_programs = \
sandbox/firdes_gmskrx_test \
sandbox/firdes_length_test \
sandbox/firfarrow_rrrf_test \
sandbox/firfilt_dcblocker_test \
sandbox/firpfbch_analysis_alignment_test \
sandbox/firpfbch2_analysis_equivalence_test \
sandbox/firpfbch2_test \

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src/modules/modem/analog/ModemAM.cpp
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@ -4,7 +4,7 @@
#include "ModemAM.h"
ModemAM::ModemAM() : ModemAnalog() {
demodAM = ampmodem_create(0.5, 0.0, LIQUID_AMPMODEM_DSB, 0);
demodAM = ampmodem_create(0.5, LIQUID_AMPMODEM_DSB, 0);
useSignalOutput(true);
}

2
src/modules/modem/analog/ModemDSB.cpp
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@ -4,7 +4,7 @@
#include "ModemDSB.h"
ModemDSB::ModemDSB() : ModemAnalog() {
demodAM_DSB = ampmodem_create(0.5, 0.0, LIQUID_AMPMODEM_DSB, 1);
demodAM_DSB = ampmodem_create(0.5, LIQUID_AMPMODEM_DSB, 1);
useSignalOutput(true);
}

3
src/modules/modem/analog/ModemFMStereo.cpp
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@ -239,7 +239,8 @@ void ModemFMStereo::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInp
nco_crcf_mix_down(fmkit->stereoPilot, y, &x);
// complex -> real
firhilbf_c2r_execute(fmkit->firStereoC2R, x, &demodStereoData[i]);
float usb_discard;
firhilbf_c2r_execute(fmkit->firStereoC2R, x, &demodStereoData[i], &usb_discard);
}
// std::cout << "[PLL] phase error: " << phase_error;

3
src/modules/modem/analog/ModemLSB.cpp
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@ -56,7 +56,8 @@ void ModemLSB::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput *a
nco_crcf_mix_up(ssbShift, input->data[i], &x);
iirfilt_crcf_execute(ssbFilt, x, &y);
nco_crcf_mix_down(ssbShift, y, &x);
firhilbf_c2r_execute(c2rFilt, x, &demodOutputData[i]);
float usb_discard;
firhilbf_c2r_execute(c2rFilt, x, &demodOutputData[i], &usb_discard);
}
buildAudioOutput(akit, audioOut, true);

3
src/modules/modem/analog/ModemUSB.cpp
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@ -56,7 +56,8 @@ void ModemUSB::demodulate(ModemKit *kit, ModemIQData *input, AudioThreadInput *a
nco_crcf_mix_down(ssbShift, input->data[i], &x);
iirfilt_crcf_execute(ssbFilt, x, &y);
nco_crcf_mix_up(ssbShift, y, &x);
firhilbf_c2r_execute(c2rFilt, x, &demodOutputData[i]);
float lsb_discard;
firhilbf_c2r_execute(c2rFilt, x, &lsb_discard, &demodOutputData[i]);
}
buildAudioOutput(akit, audioOut, true);