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/* -*- c++ -*- */
/*
* Copyright 2011,2012 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* SPDX-License-Identifier: GPL-3.0-or-later
*
*/
#ifndef INCLUDED_DIGITAL_LMS_DD_EQUALIZER_CC_IMPL_H
#define INCLUDED_DIGITAL_LMS_DD_EQUALIZER_CC_IMPL_H
#include <gnuradio/digital/lms_dd_equalizer_cc.h>
#include <gnuradio/filter/fir_filter.h>
#include <stdexcept>
namespace gr {
namespace digital {
class lms_dd_equalizer_cc_impl : public lms_dd_equalizer_cc,
filter::kernel::fir_filter_ccc
{
private:
std::vector<gr_complex> d_new_taps;
bool d_updated;
gr_complex d_error;
float d_mu;
constellation_sptr d_cnst;
protected:
gr_complex error(const gr_complex& out) override;
void update_tap(gr_complex& tap, const gr_complex& in) override;
public:
lms_dd_equalizer_cc_impl(int num_taps, float mu, int sps, constellation_sptr cnst);
~lms_dd_equalizer_cc_impl() override;
void set_taps(const std::vector<gr_complex>& taps) override;
std::vector<gr_complex> taps() const override;
float gain() const override { return d_mu; }
void set_gain(float mu) override
{
if (mu < 0.0f || mu > 1.0f) {
throw std::out_of_range(
"lms_dd_equalizer_impl::set_mu: Gain value must in [0, 1]");
} else {
d_mu = mu;
}
}
int work(int noutput_items,
gr_vector_const_void_star& input_items,
gr_vector_void_star& output_items) override;
};
} /* namespace digital */
} /* namespace gr */
#endif /* INCLUDED_DIGITAL_LMS_DD_EQUALIZER_CC_IMPL_H */
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