mirror of
https://github.com/hb9fxq/gr-digitalhf
synced 2024-11-05 13:55:53 +00:00
52 lines
954 B
C++
52 lines
954 B
C++
// -*- C++ -*-
|
|
|
|
#include <cassert>
|
|
#include "lms.hpp"
|
|
#include <volk/volk.h>
|
|
|
|
namespace gr {
|
|
namespace digitalhf {
|
|
|
|
filter_update::sptr lms::make(float mu) {
|
|
return filter_update::sptr(new lms(mu));
|
|
}
|
|
|
|
lms::lms(float mu)
|
|
: _mu(mu)
|
|
, _gain()
|
|
, _tmp() {
|
|
}
|
|
|
|
lms::~lms() {
|
|
}
|
|
|
|
void lms::resize(size_t n) {
|
|
if (_gain.size() == n)
|
|
return;
|
|
_gain.resize(n);
|
|
_tmp.resize(n);
|
|
std::fill_n(_gain.begin(), n, 0);
|
|
}
|
|
|
|
void lms::reset() {
|
|
std::fill_n(_gain.begin(), _gain.size(), 0);
|
|
}
|
|
|
|
gr_complex const* lms::update(gr_complex const* beg,
|
|
gr_complex const* end) {
|
|
assert(end-beg > 0);
|
|
size_t const n = end - beg;
|
|
resize(n);
|
|
volk_32fc_conjugate_32fc(&_tmp[0], beg, n);
|
|
volk_32f_s32f_multiply_32f((float*)&_gain[0], (float const*)&_tmp[0], _mu, 2*n);
|
|
|
|
return _gain.data();
|
|
}
|
|
|
|
void lms::set_parameters(std::map<std::string, float>const & p) {
|
|
_mu = p.at("mu");
|
|
}
|
|
|
|
} // namespace digitalhf
|
|
} // namespace gr
|