diff options
Diffstat (limited to 'gr-noaa/lib')
| -rw-r--r-- | gr-noaa/lib/.gitignore | 4 | ||||
| -rw-r--r-- | gr-noaa/lib/Makefile.am | 46 | ||||
| -rw-r--r-- | gr-noaa/lib/noaa_hrpt_decoder.cc | 77 | ||||
| -rw-r--r-- | gr-noaa/lib/noaa_hrpt_decoder.h | 47 | ||||
| -rw-r--r-- | gr-noaa/lib/noaa_hrpt_deframer.cc | 126 | ||||
| -rw-r--r-- | gr-noaa/lib/noaa_hrpt_deframer.h | 59 | ||||
| -rw-r--r-- | gr-noaa/lib/noaa_hrpt_pll_cf.cc | 82 | ||||
| -rw-r--r-- | gr-noaa/lib/noaa_hrpt_pll_cf.h | 55 | ||||
| -rw-r--r-- | gr-noaa/lib/noaa_hrpt_sync_fb.cc | 90 | ||||
| -rw-r--r-- | gr-noaa/lib/noaa_hrpt_sync_fb.h | 58 |
10 files changed, 644 insertions, 0 deletions
diff --git a/gr-noaa/lib/.gitignore b/gr-noaa/lib/.gitignore new file mode 100644 index 000000000..02b052397 --- /dev/null +++ b/gr-noaa/lib/.gitignore @@ -0,0 +1,4 @@ +Makefile +Makefile.in +.deps +.libs diff --git a/gr-noaa/lib/Makefile.am b/gr-noaa/lib/Makefile.am new file mode 100644 index 000000000..6435d192e --- /dev/null +++ b/gr-noaa/lib/Makefile.am @@ -0,0 +1,46 @@ +# +# Copyright 2009 Free Software Foundation, Inc. +# +# This file is part of GNU Radio +# +# GNU Radio is free software; you can redistribute it and/or modify +# it under the terms of the GNU General Public License as published by +# the Free Software Foundation; either version 3, or (at your option) +# any later version. +# +# GNU Radio is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details. +# +# You should have received a copy of the GNU General Public License +# along with GNU Radio; see the file COPYING. If not, write to +# the Free Software Foundation, Inc., 51 Franklin Street, +# Boston, MA 02110-1301, USA. +# + +include $(top_srcdir)/Makefile.common + +AM_CPPFLAGS = \ + $(STD_DEFINES_AND_INCLUDES) \ + $(WITH_INCLUDES) + +lib_LTLIBRARIES = \ + libgnuradio-noaa.la + +libgnuradio_noaa_la_SOURCES = \ + noaa_hrpt_decoder.cc \ + noaa_hrpt_deframer.cc \ + noaa_hrpt_pll_cf.cc \ + noaa_hrpt_sync_fb.cc + +libgnuradio_noaa_la_LIBADD = \ + $(GNURADIO_CORE_LA) + +libgnuradio_noaa_la_LDFLAGS = $(NO_UNDEFINED) -version-info 0:0:0 + +grinclude_HEADERS = \ + noaa_hrpt_decoder.h \ + noaa_hrpt_deframer.h \ + noaa_hrpt_pll_cf.h \ + noaa_hrpt_sync_fb.h diff --git a/gr-noaa/lib/noaa_hrpt_decoder.cc b/gr-noaa/lib/noaa_hrpt_decoder.cc new file mode 100644 index 000000000..8cfaa913c --- /dev/null +++ b/gr-noaa/lib/noaa_hrpt_decoder.cc @@ -0,0 +1,77 @@ +/* -*- c++ -*- */ +/* + * Copyright 2009 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <noaa_hrpt_decoder.h> +#include <gr_io_signature.h> + +#define SYNC1 0x0284 +#define SYNC2 0x016F +#define SYNC3 0x035C +#define SYNC4 0x019D +#define SYNC5 0x020F +#define SYNC6 0x0095 + +noaa_hrpt_decoder_sptr +noaa_make_hrpt_decoder() +{ + return gnuradio::get_initial_sptr(new noaa_hrpt_decoder()); +} + +noaa_hrpt_decoder::noaa_hrpt_decoder() + : gr_sync_block("noaa_hrpt_decoder", + gr_make_io_signature(1, 1, sizeof(short)), + gr_make_io_signature(0, 0, 0)) +{ + d_word_count = 0; +} + +int +noaa_hrpt_decoder::work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + const unsigned short *in = (const unsigned short*)input_items[0]; + + int i = 0; + while (i < noutput_items) { + unsigned short word = in[i++]; + d_word_count++; + //fprintf(stderr, "%5u: ", d_word_count); + for (int pos = 0; pos < 10; pos++) { + char ch = (word & (1 << 9)) ? '1' : '0'; + word = word << 1; + //fprintf(stderr, "%c ", ch); + } + //fprintf(stderr, "\n"); + + if (d_word_count == 11090) { + d_word_count = 0; + //fprintf(stderr, "\n"); + } + } + + return i; +} diff --git a/gr-noaa/lib/noaa_hrpt_decoder.h b/gr-noaa/lib/noaa_hrpt_decoder.h new file mode 100644 index 000000000..305243b09 --- /dev/null +++ b/gr-noaa/lib/noaa_hrpt_decoder.h @@ -0,0 +1,47 @@ +/* -*- c++ -*- */ +/* + * Copyright 2009 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifndef INCLUDED_NOAA_HRPT_DECODER_H +#define INCLUDED_NOAA_HRPT_DECODER_H + +#include <gr_sync_block.h> + +class noaa_hrpt_decoder; +typedef boost::shared_ptr<noaa_hrpt_decoder> noaa_hrpt_decoder_sptr; + +noaa_hrpt_decoder_sptr +noaa_make_hrpt_decoder(); + +class noaa_hrpt_decoder : public gr_sync_block +{ + friend noaa_hrpt_decoder_sptr noaa_make_hrpt_decoder(); + noaa_hrpt_decoder(); + + unsigned int d_word_count; + +public: + int work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif /* INCLUDED_NOAA_HRPT_DECODER_H */ diff --git a/gr-noaa/lib/noaa_hrpt_deframer.cc b/gr-noaa/lib/noaa_hrpt_deframer.cc new file mode 100644 index 000000000..91c94d2a6 --- /dev/null +++ b/gr-noaa/lib/noaa_hrpt_deframer.cc @@ -0,0 +1,126 @@ +/* -*- c++ -*- */ +/* + * Copyright 2009 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <noaa_hrpt_deframer.h> +#include <gr_io_signature.h> +#include <cstring> +#include <cstdio> + +#define ST_IDLE 0 +#define ST_SYNCED 1 + +#define SYNC1 0x0284 +#define SYNC2 0x016F +#define SYNC3 0x035C +#define SYNC4 0x019D +#define SYNC5 0x020F +#define SYNC6 0x0095 + +#define HRPT_MINOR_FRAME_SYNC 0x0A116FD719D83C95LL + +static int frames_seen = 0; + +noaa_hrpt_deframer_sptr +noaa_make_hrpt_deframer() +{ + return gnuradio::get_initial_sptr(new noaa_hrpt_deframer()); +} + +noaa_hrpt_deframer::noaa_hrpt_deframer() + : gr_block("noaa_hrpt_deframer", + gr_make_io_signature(1, 1, sizeof(char)), + gr_make_io_signature(1, 1, sizeof(short))) +{ + set_output_multiple(6); // room for writing full sync when received + enter_idle(); +} + +void +noaa_hrpt_deframer::enter_idle() +{ + d_state = ST_IDLE; +} + +void +noaa_hrpt_deframer::enter_synced() +{ + d_state = ST_SYNCED; + d_bit_count = HRPT_BITS_PER_WORD; + d_word_count = HRPT_MINOR_FRAME_WORDS-HRPT_SYNC_WORDS; + d_word = 0; +} + +int +noaa_hrpt_deframer::general_work(int noutput_items, + gr_vector_int &ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + int ninputs = ninput_items[0]; + const char *in = (const char *)input_items[0]; + unsigned short *out = (unsigned short *)output_items[0]; + + int i = 0, j = 0; + while (i < ninputs && j < noutput_items) { + char bit = in[i++]; + + switch (d_state) { + case ST_IDLE: + d_shifter = (d_shifter << 1) | bit; // MSB transmitted first + + if ((d_shifter & 0x0FFFFFFFFFFFFFFFLL) == HRPT_MINOR_FRAME_SYNC) { + fprintf(stderr, "SYNC #%i", frames_seen++); + out[j++] = SYNC1; + out[j++] = SYNC2; + out[j++] = SYNC3; + out[j++] = SYNC4; + out[j++] = SYNC5; + out[j++] = SYNC6; + enter_synced(); + } + break; + + case ST_SYNCED: + d_word = (d_word << 1) | bit; // MSB transmitted first + if (--d_bit_count == 0) { + out[j++] = d_word; + d_word = 0; + d_bit_count = HRPT_BITS_PER_WORD; + if (--d_word_count == 0) { + fprintf(stderr, "...done\n"); + enter_idle(); + } + } + break; + + default: + throw std::runtime_error("noaa_hrpt_deframer: bad state\n"); + } + } + + consume_each(i); + return j; +} diff --git a/gr-noaa/lib/noaa_hrpt_deframer.h b/gr-noaa/lib/noaa_hrpt_deframer.h new file mode 100644 index 000000000..0aeb16a2d --- /dev/null +++ b/gr-noaa/lib/noaa_hrpt_deframer.h @@ -0,0 +1,59 @@ +/* -*- c++ -*- */ +/* + * Copyright 2009 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifndef INCLUDED_NOAA_HRPT_DEFRAMER_H +#define INCLUDED_NOAA_HRPT_DEFRAMER_H + +#define HRPT_SYNC_WORDS 6 +#define HRPT_MINOR_FRAME_WORDS 11090 +#define HRPT_BITS_PER_WORD 10 + +#include <gr_block.h> + +class noaa_hrpt_deframer; +typedef boost::shared_ptr<noaa_hrpt_deframer> noaa_hrpt_deframer_sptr; + +noaa_hrpt_deframer_sptr +noaa_make_hrpt_deframer(); + +class noaa_hrpt_deframer : public gr_block +{ + friend noaa_hrpt_deframer_sptr noaa_make_hrpt_deframer(); + noaa_hrpt_deframer(); + + unsigned int d_state; + unsigned int d_bit_count; + unsigned int d_word_count; + unsigned long long d_shifter; // 60 bit sync word + unsigned short d_word; // 10 bit HRPT word + + void enter_idle(); + void enter_synced(); + +public: + int general_work(int noutput_items, + gr_vector_int &ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); +}; + +#endif /* INCLUDED_NOAA_HRPT_DEFRAMER_H */ diff --git a/gr-noaa/lib/noaa_hrpt_pll_cf.cc b/gr-noaa/lib/noaa_hrpt_pll_cf.cc new file mode 100644 index 000000000..08ab1d15f --- /dev/null +++ b/gr-noaa/lib/noaa_hrpt_pll_cf.cc @@ -0,0 +1,82 @@ +/* -*- c++ -*- */ +/* + * Copyright 2009 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <noaa_hrpt_pll_cf.h> +#include <gr_io_signature.h> +#include <gr_math.h> +#include <gr_sincos.h> + +#define M_TWOPI (2*M_PI) + +noaa_hrpt_pll_cf_sptr +noaa_make_hrpt_pll_cf(float alpha, float beta, float max_offset) +{ + return gnuradio::get_initial_sptr(new noaa_hrpt_pll_cf(alpha, beta, max_offset)); +} + +noaa_hrpt_pll_cf::noaa_hrpt_pll_cf(float alpha, float beta, float max_offset) + : gr_sync_block("noaa_hrpt_pll_cf", + gr_make_io_signature(1, 1, sizeof(gr_complex)), + gr_make_io_signature(1, 1, sizeof(float))), + d_alpha(alpha), d_beta(beta), d_max_offset(max_offset), + d_phase(0.0), d_freq(0.0) +{ +} + +float +phase_wrap(float phase) +{ + while (phase < -M_PI) + phase += M_TWOPI; + while (phase > M_PI) + phase -= M_TWOPI; + + return phase; +} + +int +noaa_hrpt_pll_cf::work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + const gr_complex *in = (const gr_complex *) input_items[0]; + float *out = (float *) output_items[0]; + + for (int i = 0; i < noutput_items; i++) { + + // Adjust PLL phase/frequency + float error = phase_wrap(gr_fast_atan2f(in[i].imag(), in[i].real()) - d_phase); + d_freq = gr_branchless_clip(d_freq + error*d_beta, d_max_offset); + d_phase = phase_wrap(d_phase + error*d_alpha + d_freq); + + // Generate and mix out carrier + float re, im; + gr_sincosf(d_phase, &im, &re); + out[i] = (in[i]*gr_complex(re, -im)).imag(); + } + + return noutput_items; +} diff --git a/gr-noaa/lib/noaa_hrpt_pll_cf.h b/gr-noaa/lib/noaa_hrpt_pll_cf.h new file mode 100644 index 000000000..507d47fe7 --- /dev/null +++ b/gr-noaa/lib/noaa_hrpt_pll_cf.h @@ -0,0 +1,55 @@ +/* -*- c++ -*- */ +/* + * Copyright 2009 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifndef INCLUDED_NOAA_HRPT_PLL_CF_H +#define INCLUDED_NOAA_HRPT_PLL_CF_H + +#include <gr_sync_block.h> + +class noaa_hrpt_pll_cf; +typedef boost::shared_ptr<noaa_hrpt_pll_cf> noaa_hrpt_pll_cf_sptr; + +noaa_hrpt_pll_cf_sptr +noaa_make_hrpt_pll_cf(float alpha, float beta, float max_offset); + +class noaa_hrpt_pll_cf : public gr_sync_block +{ + friend noaa_hrpt_pll_cf_sptr noaa_make_hrpt_pll_cf(float alpha, float beta, float max_offset); + noaa_hrpt_pll_cf(float alpha, float beta, float max_offset); + + float d_alpha; // 1st order loop constant + float d_beta; // 2nd order loop constant + float d_max_offset; // Maximum frequency offset, radians/sample + float d_phase; // Instantaneous carrier phase + float d_freq; // Instantaneous carrier frequency, radians/sample + + public: + virtual int work(int noutput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); + + void set_alpha(float alpha) { d_alpha = alpha; } + void set_beta(float beta) { d_beta = beta; } + void set_max_offset(float max_offset) { d_max_offset = max_offset; } +}; + +#endif /* INCLUDED_NOAA_HRPT_PLL_CF_H */ diff --git a/gr-noaa/lib/noaa_hrpt_sync_fb.cc b/gr-noaa/lib/noaa_hrpt_sync_fb.cc new file mode 100644 index 000000000..f99947f82 --- /dev/null +++ b/gr-noaa/lib/noaa_hrpt_sync_fb.cc @@ -0,0 +1,90 @@ +/* -*- c++ -*- */ +/* + * Copyright 2009 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifdef HAVE_CONFIG_H +#include "config.h" +#endif + +#include <noaa_hrpt_sync_fb.h> +#include <gr_io_signature.h> + +inline int signum(float f) +{ + return f >= 0.0 ? 1 : -1; +} + +noaa_hrpt_sync_fb_sptr +noaa_make_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset) +{ + return gnuradio::get_initial_sptr(new noaa_hrpt_sync_fb(alpha, beta, sps, max_offset)); +} + +noaa_hrpt_sync_fb::noaa_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset) + : gr_block("noaa_hrpt_sync_fb", + gr_make_io_signature(1, 1, sizeof(float)), + gr_make_io_signature(1, 1, sizeof(char))), + d_alpha(alpha), d_beta(beta), + d_sps(sps), d_max_offset(max_offset), + d_phase(0.0), d_freq(1.0/sps), + d_last_sign(1) +{ +} + +int +noaa_hrpt_sync_fb::general_work(int noutput_items, + gr_vector_int &ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items) +{ + int ninputs = ninput_items[0]; + const float *in = (const float *)input_items[0]; + char *out = (char *)output_items[0]; + + int i = 0, j = 0; + while (i < ninputs && j < noutput_items) { + float sample = in[i++]; + int sign = signum(sample); + d_phase += d_freq; + + // Train on zero crossings in center region of symbol + if (sign != d_last_sign) { + if (d_phase > 0.25 && d_phase < 0.75) { + float phase_err = d_phase-0.5; + d_phase -= phase_err*d_alpha; // 1st order phase adjustment + d_freq -= phase_err*d_beta; // 2nd order frequency adjustment + } + + d_last_sign = sign; + } + + if (d_phase > 1.0) { + if (sample < 0.0) + out[j++] = 1; + else + out[j++] = 0; + d_phase -= 1.0; + } + } + + consume_each(i); + return j; +} diff --git a/gr-noaa/lib/noaa_hrpt_sync_fb.h b/gr-noaa/lib/noaa_hrpt_sync_fb.h new file mode 100644 index 000000000..a9416b9ea --- /dev/null +++ b/gr-noaa/lib/noaa_hrpt_sync_fb.h @@ -0,0 +1,58 @@ +/* -*- c++ -*- */ +/* + * Copyright 2009 Free Software Foundation, Inc. + * + * This file is part of GNU Radio + * + * GNU Radio is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 3, or (at your option) + * any later version. + * + * GNU Radio is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with GNU Radio; see the file COPYING. If not, write to + * the Free Software Foundation, Inc., 51 Franklin Street, + * Boston, MA 02110-1301, USA. + */ + +#ifndef INCLUDED_NOAA_HRPT_SYNC_FB_H +#define INCLUDED_NOAA_HRPT_SYNC_FB_H + +#include <gr_block.h> + +class noaa_hrpt_sync_fb; +typedef boost::shared_ptr<noaa_hrpt_sync_fb> noaa_hrpt_sync_fb_sptr; + +noaa_hrpt_sync_fb_sptr +noaa_make_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset); + +class noaa_hrpt_sync_fb : public gr_block +{ + friend noaa_hrpt_sync_fb_sptr noaa_make_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset); + noaa_hrpt_sync_fb(float alpha, float beta, float sps, float max_offset); + + float d_alpha; // 1st order loop constant + float d_beta; // 2nd order loop constant + float d_sps; // samples per symbol + float d_max_offset; // Maximum frequency offset for d_sps, samples/symbol + float d_phase; // Instantaneous symbol phase + float d_freq; // Instantaneous symbol frequency, samples/symbol + int d_last_sign; // Tracks zero crossings + + public: + int general_work(int noutput_items, + gr_vector_int &ninput_items, + gr_vector_const_void_star &input_items, + gr_vector_void_star &output_items); + + void set_alpha(float alpha) { d_alpha = alpha; } + void set_beta(float beta) { d_beta = beta; } + void set_max_offset(float max_offset) { d_max_offset = max_offset; } +}; + +#endif /* INCLUDED_NOAA_HRPT_SYNC_FB_H */ |