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51 lines
2.5 KiB
C++
51 lines
2.5 KiB
C++
///////////////////////////////////////////////////////////////////////////////////
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// Copyright (C) 2026 Edouard Griffiths, F4EXB <f4exb06@gmail.com> //
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// //
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// This program is free software; you can redistribute it and/or modify //
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// it under the terms of the GNU General Public License as published by //
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// the Free Software Foundation as version 3 of the License, or //
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// (at your option) any later version. //
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// //
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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 V3 for more details. //
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// //
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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, see <http://www.gnu.org/licenses/>. //
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///////////////////////////////////////////////////////////////////////////////////
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#include "mainbench.h"
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#include "dsp/firfilterrrc.h"
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#include <QDebug>
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void MainBench::testFIRRRCFilter()
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{
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qDebug() << "MainBench::testFIRRRCFilter";
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FIRFilterRRC filter;
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filter.create(0.05f, 0.35f, 8, FIRFilterRRC::Normalization::Gain); // 2400 baud, 0.35 rolloff
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qDebug() << "MainBench::testFIRRRCFilter: filter created";
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FILE *fd_filter = fopen("test_rrc_filter.txt", "w");
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const std::vector<float>& taps = filter.getTaps();
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for (auto tap : taps) {
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fprintf(fd_filter, "%f\n", std::abs(tap));
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}
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qDebug() << "MainBench::testFIRRRCFilter: filter coefficients written to test_rrc_filter.txt";
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fclose(fd_filter);
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qDebug() << "MainBench::testFIRRRCFilter: running filter";
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FILE *fd = fopen("test_rrc.txt", "w");
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for (int i = 0; i < 1000; i++)
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{
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Real phi = i * (1200.0 / 48000.0) * (2*3.141);
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Real x = sin(phi) > 0.0 ? 1.0f : -1.0f; // Simulate a BPSK signal at 1200 baud
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Complex rrc = filter.filter(Complex(x, 0.0f));
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fprintf(fd, "%f\n", rrc.real());
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}
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qDebug() << "MainBench::testFIRRRCFilter: output samples written to test_firrrc.txt";
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fclose(fd);
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}
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