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added normalizer for sinusoidal signal

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Ahmet Inan 2019-02-25 13:00:58 +01:00
commit c7f3cdd565
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normalize.hh Normal file
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/*
Normalizers for periodic signals
Copyright 2019 Ahmet Inan <inan@aicodix.de>
*/
#pragma once
#include "blockdc.hh"
#include "ema.hh"
namespace DSP {
template <typename TYPE>
class NormalizeSine
{
DSP::BlockDC<TYPE, TYPE> hpf;
DSP::EMA<TYPE, TYPE> lpf;
public:
constexpr NormalizeSine() : lpf(1)
{
}
void samples(int s)
{
hpf.samples(s);
lpf.samples(s);
}
TYPE operator()(TYPE input)
{
TYPE tmp = hpf(input);
TYPE amp = sqrt(TYPE(2) * lpf(tmp * tmp));
return tmp / amp;
}
};
template <typename COMPLEX>
class NormalizeIQ
{
NormalizeSine<typename COMPLEX::value_type> ni, nq;
public:
void samples(int s)
{
ni.samples(s);
nq.samples(s);
}
COMPLEX operator()(COMPLEX iq)
{
return COMPLEX(ni(iq.real()), nq(iq.imag()));
}
};
}