Mirror/aicodix___modem
1
0
Fork 0
mirror of https://github.com/aicodix/modem.git synced 2026-04-27 22:35:41 +00:00
Code Issues Projects Releases Packages Wiki Activity

added scale parameter

Browse source
This commit is contained in:
Ahmet Inan 2024-01-24 14:51:48 +01:00
commit 6523f6f701
1 changed files with 6 additions and 5 deletions
Download patch file Download diff file Expand all files Collapse all files

11
encode.cc
View file

@ -73,7 +73,7 @@ struct Encoder
{
return 1 - 2 * bit;
}
void clipping_and_filtering(bool limit)
void clipping_and_filtering(value scale, bool limit)
{
for (int i = 0; i < symbol_len; ++i) {
value pwr = norm(tdom[i]);
@ -83,7 +83,7 @@ struct Encoder
fwd(temp, tdom);
for (int i = 0; i < symbol_len; ++i) {
if (norm(fdom[i])) {
temp[i] /= std::sqrt(value(symbol_len/4));
temp[i] *= scale / std::sqrt(value(symbol_len));
cmplx err = temp[i] - fdom[i];
value mag = abs(err);
value lim = 0.1 * mod_distance();
@ -95,7 +95,7 @@ struct Encoder
}
bwd(tdom, temp);
for (int i = 0; i < symbol_len; ++i)
tdom[i] /= std::sqrt(value(symbol_len*4));
tdom[i] /= scale * std::sqrt(value(symbol_len));
}
void tone_reservation()
{
@ -114,9 +114,10 @@ struct Encoder
void symbol(bool papr_reduction = true)
{
bwd(tdom, fdom);
value scale = 2;
for (int i = 0; i < symbol_len; ++i)
tdom[i] /= std::sqrt(value(symbol_len*4));
clipping_and_filtering(oper_mode > 25 && papr_reduction);
tdom[i] /= scale * std::sqrt(value(symbol_len));
clipping_and_filtering(scale, oper_mode > 25 && papr_reduction);
if (oper_mode > 25 && papr_reduction)
tone_reservation();
for (int i = 0; i < symbol_len; ++i)