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improve PAPR by hard clipping the magnitude

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Ahmet Inan 2021-06-14 14:00:40 +02:00
commit 39ec8e81a5
1 changed files with 6 additions and 1 deletions
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7
encode.cc
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@ -68,7 +68,12 @@ struct Encoder
{
bwd(tdom, fdom);
for (int i = 0; i < symbol_len; ++i)
tdom[i] /= sqrt(value(8 * symbol_len));
tdom[i] /= sqrt(value(4 * symbol_len));
for (int i = 0; i < symbol_len; ++i) {
value amp = std::max(std::abs(tdom[i].real()), std::abs(tdom[i].imag()));
if (amp > value(1))
tdom[i] /= amp;
}
for (int i = 0; i < guard_len; ++i) {
value x = value(i) / value(guard_len - 1);
x = value(0.5) * (value(1) - std::cos(DSP::Const<value>::Pi() * x));