mirror of
https://github.com/hb9fxq/gr-digitalhf
synced 2024-11-05 05:55:53 +00:00
52 lines
956 B
C++
52 lines
956 B
C++
// -*- C++ -*-
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#include <cassert>
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#include "lms.hpp"
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#include <volk/volk.h>
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namespace gr {
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namespace digitalhf {
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filter_update::sptr lms::make(float mu) {
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return filter_update::sptr(new lms(mu));
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}
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lms::lms(float mu)
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: _mu(mu)
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, _gain()
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, _tmp() {
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}
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lms::~lms() {
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}
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void lms::resize(size_t n) {
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if (_gain.size() == n)
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return;
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_gain.resize(n);
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_tmp.resize(n);
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std::fill_n(_gain.begin(), n, 0);
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}
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void lms::reset() {
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std::fill_n(_gain.begin(), _gain.size(), 0);
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}
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gr_complex const* lms::update(gr_complex const* beg,
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gr_complex const* end) {
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assert(end-beg > 0);
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size_t const n = end - beg;
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resize(n);
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volk_32fc_conjugate_32fc(&_tmp[0], beg, n);
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volk_32f_s32f_multiply_32f((float*)&_gain[0], (float const*)&_tmp[0], _mu, 2*n);
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return &_gain.front();
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}
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void lms::set_parameters(std::map<std::string, float>const & p) {
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_mu = p.at("mu");
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}
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} // namespace digitalhf
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} // namespace gr
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