diff options
| author | Tom Rondeau <trondeau@vt.edu> | 2012-08-14 21:00:26 -0400 |
|---|---|---|
| committer | Tom Rondeau <trondeau@vt.edu> | 2012-08-14 21:00:26 -0400 |
| commit | c537cf7d85f59db21c98ac859bc08fbe55031314 (patch) | |
| tree | fd260f991eeb7fe1e2b7e2c2f781bfa50f6b2704 /gr-digital/lib/lms_dd_equalizer_cc_impl.cc | |
| parent | e45449570984c0a709a21ea5ab078f9747e4b9c5 (diff) | |
digital: converted equalizers and fixed cma equalizer.
Diffstat (limited to 'gr-digital/lib/lms_dd_equalizer_cc_impl.cc')
| -rw-r--r-- | gr-digital/lib/lms_dd_equalizer_cc_impl.cc | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/gr-digital/lib/lms_dd_equalizer_cc_impl.cc b/gr-digital/lib/lms_dd_equalizer_cc_impl.cc new file mode 100644 index 0000000000..6c217896c3 --- /dev/null +++ b/gr-digital/lib/lms_dd_equalizer_cc_impl.cc @@ -0,0 +1,94 @@ +/* -*- c++ -*- */ +/* + * Copyright 2011,2012 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 "lms_dd_equalizer_cc_impl.h" +#include <gr_io_signature.h> +#include <gr_misc.h> +#include <volk/volk.h> + +namespace gr { + namespace digital { + + lms_dd_equalizer_cc::sptr + lms_dd_equalizer_cc::make(int num_taps, float mu, int sps, + constellation_sptr cnst) + { + return gnuradio::get_initial_sptr + (new lms_dd_equalizer_cc_impl(num_taps, mu, sps, cnst)); + } + + lms_dd_equalizer_cc_impl::lms_dd_equalizer_cc_impl(int num_taps, float mu, + int sps, + constellation_sptr cnst) + : gr_sync_decimator("lms_dd_equalizer_cc", + gr_make_io_signature(1, 1, sizeof(gr_complex)), + gr_make_io_signature(1, 1, sizeof(gr_complex)), + sps), + filter::kernel::fir_filter_ccc(sps, std::vector<gr_complex>(num_taps, gr_complex(0,0))), + d_cnst(cnst) + { + set_gain(mu); + if(num_taps > 0) + d_taps[0] = 1.0; + set_taps(d_taps); + + const int alignment_multiple = + volk_get_alignment() / sizeof(gr_complex); + set_alignment(std::max(1,alignment_multiple)); + + set_history(num_taps+1); + } + + lms_dd_equalizer_cc_impl::~lms_dd_equalizer_cc_impl() + { + } + + int + lms_dd_equalizer_cc_impl::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]; + gr_complex *out = (gr_complex *)output_items[0]; + + int j = 0; + size_t l = d_taps.size(); + for(int i = 0; i < noutput_items; i++) { + out[i] = filter(&in[j]); + + d_error = error(out[i]); + for(size_t k=0; k < l; k++) { + update_tap(d_taps[k], in[i+k]); + } + + j += decimation(); + } + + return noutput_items; + } + + } /* namespace digital */ +} /* namespace gr */ |