mirror of
https://github.com/f4exb/sdrangel.git
synced 2024-12-23 10:05:46 -05:00
845 lines
19 KiB
C++
845 lines
19 KiB
C++
/* snb.c
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This file is part of a program that implements a Software-Defined Radio.
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Copyright (C) 2015, 2016 Warren Pratt, NR0V
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Copyright (C) 2024 Edouard Griffiths, F4EXB Adapted to SDRangel
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This program is free software; you can redistribute it and/or
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modify it under the terms of the GNU General Public License
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as published by the Free Software Foundation; either version 2
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of the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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The author can be reached by email at
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warren@wpratt.com
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*/
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#include <array>
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#include "comm.hpp"
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#include "resample.hpp"
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#include "lmath.hpp"
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#include "firmin.hpp"
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#include "nbp.hpp"
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#include "amd.hpp"
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#include "anf.hpp"
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#include "anr.hpp"
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#include "emnr.hpp"
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#include "snba.hpp"
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namespace WDSP {
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SNBA::Exec::Exec(int xsize, int _asize, int _npasses) :
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asize(_asize),
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npasses(_npasses)
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{
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a.resize(xsize);
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v.resize(xsize);
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detout.resize(xsize);
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savex.resize(xsize);
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xHout.resize(xsize);
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unfixed.resize(xsize);
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}
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void SNBA::Exec::fluxh()
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{
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std::fill (a.begin(), a.end(), 0);
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std::fill (v.begin(), v.end(), 0);
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std::fill (detout.begin(), detout.end(), 0);
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std::fill (savex.begin(), savex.end(), 0);
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std::fill (xHout.begin(), xHout.end(), 0);
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std::fill (unfixed.begin(), unfixed.end(), 0);
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}
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SNBA::Det::Det(
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int _xsize,
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double _k1,
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double _k2,
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int _b,
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int _pre,
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int _post
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) :
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k1(_k1),
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k2(_k2),
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b(_b),
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pre(_pre),
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post(_post)
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{
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vp.resize(_xsize);
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vpwr.resize(_xsize);
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}
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void SNBA::Det::flush()
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{
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std::fill(vp.begin(), vp.end(), 0);
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std::fill(vpwr.begin(), vpwr.end(), 0);
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}
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SNBA::Wrk::Wrk(
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int xsize,
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int asize
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) :
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xHat_a1rows_max(xsize + asize),
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xHat_a2cols_max(xsize + 2 * asize)
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{
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xHat_r.resize(xsize);
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xHat_ATAI.resize(xsize * xsize);
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xHat_A1.resize(xHat_a1rows_max * xsize);
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xHat_A2.resize(xHat_a1rows_max * xHat_a2cols_max);
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xHat_P1.resize(xsize * xHat_a2cols_max);
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xHat_P2.resize(xsize);
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trI_y.resize(xsize - 1);
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trI_v.resize(xsize - 1);
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dR_z.resize(xsize - 2);
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asolve_r.resize(asize + 1);
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asolve_z.resize(asize + 1);
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}
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void SNBA::calc()
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{
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if (inrate >= internalrate)
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isize = bsize / (inrate / internalrate);
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else
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isize = bsize * (internalrate / inrate);
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inbuff.resize(isize * 2);
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outbuff.resize(isize * 2);
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if (inrate != internalrate)
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resamprun = 1;
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else
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resamprun = 0;
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inresamp = new RESAMPLE(
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resamprun,
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bsize,
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in,
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inbuff.data(),
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inrate,
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internalrate,
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0.0,
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0,
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2.0
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);
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inresamp->setFCLow(250.0);
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outresamp = new RESAMPLE(
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resamprun,
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isize,
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outbuff.data(),
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out,
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internalrate,
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inrate,
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0.0,
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0,
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2.0
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);
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outresamp->setFCLow(200.0);
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incr = xsize / ovrlp;
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if (incr > isize)
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iasize = incr;
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else
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iasize = isize;
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iainidx = 0;
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iaoutidx = 0;
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inaccum.resize(iasize * 2);
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nsamps = 0;
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if (incr > isize)
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{
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oasize = incr;
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oainidx = 0;
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oaoutidx = isize;
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}
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else
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{
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oasize = isize;
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oainidx = 0;
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oaoutidx = 0;
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}
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init_oaoutidx = oaoutidx;
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outaccum.resize(oasize * 2);
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}
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SNBA::SNBA(
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int _run,
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float* _in,
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float* _out,
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int _inrate,
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int _internalrate,
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int _bsize,
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int _ovrlp,
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int _xsize,
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int _asize,
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int _npasses,
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double _k1,
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double _k2,
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int _b,
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int _pre,
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int _post,
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double _pmultmin,
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double _out_low_cut,
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double _out_high_cut
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) :
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run(_run),
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in(_in),
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out(_out),
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inrate(_inrate),
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internalrate(_internalrate),
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bsize(_bsize),
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xsize(_xsize),
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ovrlp(_ovrlp),
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incr(0),
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iasize(0),
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iainidx(0),
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iaoutidx(0),
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xaux(nullptr),
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nsamps(0),
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oasize(0),
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oainidx(0),
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oaoutidx(0),
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init_oaoutidx(0),
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resamprun(0),
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isize(0),
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inresamp(nullptr),
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outresamp(nullptr),
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out_low_cut(_out_low_cut),
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out_high_cut(_out_high_cut),
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exec(_xsize, _asize, _npasses),
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sdet(_xsize, _k1, _k2, _b, _pre, _post),
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wrk(_xsize, _asize)
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{
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scan.pmultmin = _pmultmin;
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calc();
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xbase.resize(2 * xsize);
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xaux = &xbase[xsize];
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}
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void SNBA::decalc()
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{
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delete outresamp;
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delete inresamp;
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}
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SNBA::~SNBA()
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{
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decalc();
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}
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void SNBA::flush()
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{
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iainidx = 0;
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iaoutidx = 0;
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nsamps = 0;
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oainidx = 0;
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oaoutidx = init_oaoutidx;
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exec.fluxh();
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sdet.flush();
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std::fill(inaccum.begin(), inaccum.end(), 0);
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std::fill(outaccum.begin(), outaccum.end(), 0);
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std::fill(xaux, xaux + xsize, 0);
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std::fill(inbuff.begin(), inbuff.end(), 0);
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std::fill(outbuff.begin(), outbuff.end(), 0);
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inresamp->flush();
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outresamp->flush();
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}
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void SNBA::setBuffers(float* _in, float* _out)
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{
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decalc();
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in = _in;
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out = _out;
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calc();
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}
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void SNBA::setSamplerate(int rate)
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{
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decalc();
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inrate = rate;
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calc();
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}
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void SNBA::setSize(int size)
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{
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decalc();
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bsize = size;
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calc();
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}
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void SNBA::ATAc0 (int n, int nr, std::vector<double>& A, std::vector<double>& r)
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{
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std::fill(r.begin(), r.begin() + n, 0);
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for (int i = 0; i < n; i++)
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{
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for (int j = 0; j < nr; j++)
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r[i] += A[j * n + i] * A[j * n + 0];
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}
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}
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void SNBA::multA1TA2(std::vector<double>& a1, std::vector<double>& a2, int m, int n, int q, std::vector<double>& c)
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{
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int k;
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int p = q - m;
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std::fill(c.begin(), c.begin() + m*n, 0);
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for (int i = 0; i < m; i++)
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{
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for (int j = 0; j < n; j++)
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{
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if (j < p)
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{
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for (k = i; k <= std::min(i + p, j); k++)
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c[i * n + j] += a1[k * m + i] * a2[k * n + j];
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}
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if (j >= n - p)
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{
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for (k = std::max(i, q - (n - j)); k <= i + p; k++)
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c[i * n + j] += a1[k * m + i] * a2[k * n + j];
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}
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}
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}
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}
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void SNBA::multXKE(std::vector<double>& a, const double* xk, int m, int q, int p, std::vector<double>& vout)
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{
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int k;
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std::fill(vout.begin(), vout.begin() + m, 0);
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for (int i = 0; i < m; i++)
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{
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for (k = i; k < p; k++)
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vout[i] += a[i * q + k] * xk[k];
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for (k = q - p; k <= q - m + i; k++)
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vout[i] += a[i * q + k] * xk[k];
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}
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}
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void SNBA::multAv(std::vector<double>& a, std::vector<double>& v, int m, int q, std::vector<double>& vout)
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{
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std::fill(vout.begin(), vout.begin() + m, 0);
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for (int i = 0; i < m; i++)
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{
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for (int k = 0; k < q; k++)
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vout[i] += a[i * q + k] * v[k];
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}
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}
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void SNBA::xHat(
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int xusize,
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int asize,
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const double* xk,
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std::vector<double>& a,
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std::vector<double>& xout,
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std::vector<double>& r,
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std::vector<double>& ATAI,
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std::vector<double>& A1,
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std::vector<double>& A2,
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std::vector<double>& P1,
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std::vector<double>& P2,
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std::vector<double>& trI_y,
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std::vector<double>& trI_v,
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std::vector<double>& dR_z
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)
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{
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int i;
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int j;
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int k;
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int a1rows = xusize + asize;
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int a2cols = xusize + 2 * asize;
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std::fill (r.begin(), r.begin() + xusize, 0); // work space
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std::fill (ATAI.begin(), ATAI.begin() + xusize * xusize, 0); // work space
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std::fill (A1.begin(), A1.begin() + a1rows * xusize, 0); // work space
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std::fill (A2.begin(), A2.begin() + a1rows * a2cols, 0); // work space
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std::fill (P1.begin(), P1.begin() + xusize * a2cols, 0); // work space
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std::fill (P2.begin(), P2.begin() + xusize, 0); // work space
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for (i = 0; i < xusize; i++)
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{
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A1[i * xusize + i] = 1.0;
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k = i + 1;
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for (j = k; j < k + asize; j++)
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A1[j * xusize + i] = - a[j - k];
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}
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for (i = 0; i < asize; i++)
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{
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for (k = asize - i - 1, j = 0; k < asize; k++, j++)
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A2[j * a2cols + i] = a[k];
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}
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for (i = asize + xusize; i < 2 * asize + xusize; i++)
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{
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A2[(i - asize) * a2cols + i] = - 1.0;
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for (j = i - asize + 1, k = 0; j < xusize + asize; j++, k++)
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A2[j * a2cols + i] = a[k];
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}
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ATAc0(xusize, xusize + asize, A1, r);
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LMathd::trI(xusize, r.data(), ATAI.data(), trI_y.data(), trI_v.data(), dR_z.data());
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multA1TA2(A1, A2, xusize, 2 * asize + xusize, xusize + asize, P1);
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multXKE(P1, xk, xusize, xusize + 2 * asize, asize, P2);
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multAv(ATAI, P2, xusize, xusize, xout);
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}
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void SNBA::invf(int xsize, int asize, std::vector<double>& a, const double* x, std::vector<double>& v)
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{
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int i;
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int j;
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std::fill(v.begin(), v.begin() + xsize, 0);
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for (i = asize; i < xsize - asize; i++)
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{
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for (j = 0; j < asize; j++)
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v[i] += a[j] * (x[i - 1 - j] + x[i + 1 + j]);
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v[i] = x[i] - 0.5 * v[i];
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}
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for (i = xsize - asize; i < xsize; i++)
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{
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for (j = 0; j < asize; j++)
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v[i] += a[j] * x[i - 1 - j];
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v[i] = x[i] - v[i];
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}
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}
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void SNBA::det(int asize, std::vector<double>& v, std::vector<int>& detout)
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{
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int i;
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int j;
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double medpwr;
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double t1;
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double t2;
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int bstate;
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int bcount;
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int bsamp;
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for (i = asize, j = 0; i < xsize; i++, j++)
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{
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sdet.vpwr[i] = v[i] * v[i];
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sdet.vp[j] = sdet.vpwr[i];
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}
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LMathd::median(xsize - asize, sdet.vp.data(), &medpwr);
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t1 = sdet.k1 * medpwr;
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t2 = 0.0;
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for (i = asize; i < xsize; i++)
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{
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if (sdet.vpwr[i] <= t1)
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t2 += sdet.vpwr[i];
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else if (sdet.vpwr[i] <= 2.0 * t1)
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t2 += 2.0 * t1 - sdet.vpwr[i];
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}
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t2 *= sdet.k2 / (double) (xsize - asize);
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for (i = asize; i < xsize; i++)
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{
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if (sdet.vpwr[i] > t2)
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detout[i] = 1;
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else
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detout[i] = 0;
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}
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bstate = 0;
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bcount = 0;
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bsamp = 0;
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for (i = asize; i < xsize; i++)
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{
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switch (bstate)
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{
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case 0:
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if (detout[i] == 1)
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bstate = 1;
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break;
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case 1:
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if (detout[i] == 0)
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{
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bstate = 2;
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bsamp = i;
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bcount = 1;
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}
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break;
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case 2:
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++bcount;
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if (bcount > sdet.b)
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{
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if (detout[i] == 1)
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bstate = 1;
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else
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bstate = 0;
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}
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else if (detout[i] == 1)
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{
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for (j = bsamp; j < bsamp + bcount - 1; j++)
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detout[j] = 1;
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bstate = 1;
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}
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break;
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default:
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break;
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}
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}
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for (i = asize; i < xsize; i++)
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{
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if (detout[i] == 1)
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{
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for (j = i - 1; j > i - 1 - sdet.pre; j--)
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{
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if (j >= asize)
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detout[j] = 1;
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}
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}
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}
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for (i = xsize - 1; i >= asize; i--)
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{
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if (detout[i] == 1)
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{
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for (j = i + 1; j < i + 1 + sdet.post; j++)
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{
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if (j < xsize)
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detout[j] = 1;
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}
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}
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}
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}
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int SNBA::scanFrame(
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int xsize,
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int pval,
|
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double pmultmin,
|
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std::vector<int>& det,
|
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std::array<int, MAXIMP>& bimp,
|
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std::array<int, MAXIMP>& limp,
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std::array<int, MAXIMP>& befimp,
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std::array<int, MAXIMP>& aftimp,
|
|
std::array<int, MAXIMP>& p_opt,
|
|
int* next
|
|
)
|
|
{
|
|
int inflag = 0;
|
|
int i = 0;
|
|
int j = 0;
|
|
int k = 0;
|
|
int nimp = 0;
|
|
double td;
|
|
int ti;
|
|
std::array<double, MAXIMP> merit = { 0 };
|
|
std::array<int, MAXIMP> nextlist;
|
|
std::fill(befimp.begin(), befimp.end(), 0);
|
|
std::fill(aftimp.begin(), aftimp.end(), 0);
|
|
|
|
while (i < xsize && nimp < MAXIMP)
|
|
{
|
|
if (det[i] == 1 && inflag == 0)
|
|
{
|
|
inflag = 1;
|
|
bimp[nimp] = i;
|
|
limp[nimp] = 1;
|
|
nimp++;
|
|
}
|
|
else if (det[i] == 1)
|
|
{
|
|
if (nimp > 0)
|
|
limp[nimp - 1]++;
|
|
}
|
|
else
|
|
{
|
|
inflag = 0;
|
|
befimp[nimp]++;
|
|
if (nimp > 0)
|
|
aftimp[nimp - 1]++;
|
|
}
|
|
|
|
i++;
|
|
}
|
|
|
|
for (i = 0; i < nimp; i++)
|
|
{
|
|
if (befimp[i] < aftimp[i])
|
|
p_opt[i] = befimp[i];
|
|
else
|
|
p_opt[i] = aftimp[i];
|
|
|
|
if (p_opt[i] > pval)
|
|
p_opt[i] = pval;
|
|
|
|
if (p_opt[i] < (int)(pmultmin * limp[i]))
|
|
p_opt[i] = -1;
|
|
}
|
|
|
|
for (i = 0; i < nimp; i++)
|
|
{
|
|
merit[i] = (double)p_opt[i] / (double)limp[i];
|
|
nextlist[i] = i;
|
|
}
|
|
|
|
for (j = 0; j < nimp - 1; j++)
|
|
{
|
|
for (k = 0; k < nimp - j - 1; k++)
|
|
{
|
|
if (merit[k] < merit[k + 1])
|
|
{
|
|
td = merit[k];
|
|
ti = nextlist[k];
|
|
merit[k] = merit[k + 1];
|
|
nextlist[k] = nextlist[k + 1];
|
|
merit[k + 1] = td;
|
|
nextlist[k + 1] = ti;
|
|
}
|
|
}
|
|
}
|
|
|
|
i = 1;
|
|
|
|
if (nimp > 0)
|
|
{
|
|
while (merit[i] == merit[0] && i < nimp)
|
|
i++;
|
|
}
|
|
|
|
for (j = 0; j < i - 1; j++)
|
|
{
|
|
for (k = 0; k < i - j - 1; k++)
|
|
{
|
|
if (limp[nextlist[k]] < limp[nextlist[k + 1]])
|
|
{
|
|
td = merit[k];
|
|
ti = nextlist[k];
|
|
merit[k] = merit[k + 1];
|
|
nextlist[k] = nextlist[k + 1];
|
|
merit[k + 1] = td;
|
|
nextlist[k + 1] = ti;
|
|
}
|
|
}
|
|
}
|
|
|
|
*next = nextlist[0];
|
|
return nimp;
|
|
}
|
|
|
|
void SNBA::execFrame(double* x)
|
|
{
|
|
int nimp;
|
|
std::array<int, MAXIMP> bimp;
|
|
std::array<int, MAXIMP> limp;
|
|
std::array<int, MAXIMP> befimp;
|
|
std::array<int, MAXIMP> aftimp;
|
|
std::array<int, MAXIMP> p_opt;
|
|
int next = 0;
|
|
int p;
|
|
std::copy(x, x + xsize, exec.savex.begin());
|
|
LMathd::asolve(xsize, exec.asize, x, exec.a.data(), wrk.asolve_r.data(), wrk.asolve_z.data());
|
|
invf(xsize, exec.asize, exec.a, x, exec.v);
|
|
det(exec.asize, exec.v, exec.detout);
|
|
|
|
for (int i = 0; i < xsize; i++)
|
|
{
|
|
if (exec.detout[i] != 0)
|
|
x[i] = 0.0;
|
|
}
|
|
|
|
nimp = scanFrame(xsize, exec.asize, scan.pmultmin, exec.detout, bimp, limp, befimp, aftimp, p_opt, &next);
|
|
|
|
for (int pass = 0; pass < exec.npasses; pass++)
|
|
{
|
|
std::copy(exec.detout.begin(), exec.detout.end(), exec.unfixed.begin());
|
|
|
|
for (int k = 0; k < nimp; k++)
|
|
{
|
|
if (k > 0)
|
|
scanFrame(xsize, exec.asize, scan.pmultmin, exec.unfixed, bimp, limp, befimp, aftimp, p_opt, &next);
|
|
|
|
if ((p = p_opt[next]) > 0)
|
|
{
|
|
LMathd::asolve(xsize, p, x, exec.a.data(), wrk.asolve_r.data(), wrk.asolve_z.data());
|
|
xHat(
|
|
limp[next],
|
|
p,
|
|
&x[bimp[next] - p],
|
|
exec.a,
|
|
exec.xHout,
|
|
wrk.xHat_r,
|
|
wrk.xHat_ATAI,
|
|
wrk.xHat_A1,
|
|
wrk.xHat_A2,
|
|
wrk.xHat_P1,
|
|
wrk.xHat_P2,
|
|
wrk.trI_y,
|
|
wrk.trI_v,
|
|
wrk.dR_z
|
|
);
|
|
std::copy(exec.xHout.begin(), exec.xHout.begin() + limp[next], &x[bimp[next]]);
|
|
memset (&exec.unfixed[bimp[next]], 0, limp[next] * sizeof (int));
|
|
}
|
|
else
|
|
{
|
|
memcpy (&x[bimp[next]], &exec.savex[bimp[next]], limp[next] * sizeof (double));
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
void SNBA::execute()
|
|
{
|
|
if (run)
|
|
{
|
|
int i;
|
|
inresamp->execute();
|
|
|
|
for (i = 0; i < 2 * isize; i += 2)
|
|
{
|
|
inaccum[iainidx] = inbuff[i];
|
|
iainidx = (iainidx + 1) % iasize;
|
|
}
|
|
|
|
nsamps += isize;
|
|
|
|
while (nsamps >= incr)
|
|
{
|
|
memcpy (&xaux[xsize - incr], &inaccum[iaoutidx], incr * sizeof (double));
|
|
execFrame (xaux);
|
|
iaoutidx = (iaoutidx + incr) % iasize;
|
|
nsamps -= incr;
|
|
memcpy (&outaccum[oainidx], xaux, incr * sizeof (double));
|
|
oainidx = (oainidx + incr) % oasize;
|
|
std::copy(&xbase[incr], &xbase[incr] + (2 * xsize - incr), xbase.begin());
|
|
}
|
|
|
|
for (i = 0; i < isize; i++)
|
|
{
|
|
outbuff[2 * i + 0] = (float) outaccum[oaoutidx];
|
|
outbuff[2 * i + 1] = 0.0;
|
|
oaoutidx = (oaoutidx + 1) % oasize;
|
|
}
|
|
|
|
outresamp->execute();
|
|
}
|
|
else if (out != in)
|
|
{
|
|
std::copy(in, in + bsize * 2, out);
|
|
}
|
|
}
|
|
|
|
/********************************************************************************************************
|
|
* *
|
|
* Public Properties *
|
|
* *
|
|
********************************************************************************************************/
|
|
|
|
void SNBA::setOvrlp(int _ovrlp)
|
|
{
|
|
decalc();
|
|
ovrlp = _ovrlp;
|
|
calc();
|
|
}
|
|
|
|
void SNBA::setAsize(int size)
|
|
{
|
|
exec.asize = size;
|
|
}
|
|
|
|
void SNBA::setNpasses(int npasses)
|
|
{
|
|
exec.npasses = npasses;
|
|
}
|
|
|
|
void SNBA::setK1(double k1)
|
|
{
|
|
sdet.k1 = k1;
|
|
}
|
|
|
|
void SNBA::setK2(double k2)
|
|
{
|
|
sdet.k2 = k2;
|
|
}
|
|
|
|
void SNBA::setBridge(int bridge)
|
|
{
|
|
sdet.b = bridge;
|
|
}
|
|
|
|
void SNBA::setPresamps(int presamps)
|
|
{
|
|
sdet.pre = presamps;
|
|
}
|
|
|
|
void SNBA::setPostsamps(int postsamps)
|
|
{
|
|
sdet.post = postsamps;
|
|
}
|
|
|
|
void SNBA::setPmultmin(double pmultmin)
|
|
{
|
|
scan.pmultmin = pmultmin;
|
|
}
|
|
|
|
void SNBA::setOutputBandwidth(double flow, double fhigh)
|
|
{
|
|
double f_low = 0;
|
|
double f_high = 0;
|
|
|
|
if (flow >= 0 && fhigh >= 0)
|
|
{
|
|
if (fhigh < out_low_cut)
|
|
fhigh = out_low_cut;
|
|
|
|
if (flow > out_high_cut)
|
|
flow = out_high_cut;
|
|
|
|
f_low = std::max (out_low_cut, flow);
|
|
f_high = std::min (out_high_cut, fhigh);
|
|
}
|
|
else if (flow <= 0 && fhigh <= 0)
|
|
{
|
|
if (flow > -out_low_cut)
|
|
flow = -out_low_cut;
|
|
|
|
if (fhigh < -out_high_cut)
|
|
fhigh = -out_high_cut;
|
|
|
|
f_low = std::max (out_low_cut, -fhigh);
|
|
f_high = std::min (out_high_cut, -flow);
|
|
}
|
|
else if (flow < 0 && fhigh > 0)
|
|
{
|
|
double absmax = std::max (-flow, fhigh);
|
|
|
|
if (absmax < out_low_cut)
|
|
absmax = out_low_cut;
|
|
|
|
f_low = out_low_cut;
|
|
f_high = std::min (out_high_cut, absmax);
|
|
}
|
|
|
|
outresamp->setBandwidth(f_low, f_high);
|
|
}
|
|
|
|
} // namespace
|