mirror of
https://github.com/aicodix/modem.git
synced 2026-04-27 14:30:34 +00:00
always use 32 comb type pilots
This commit is contained in:
Ahmet Inan
parent
91090f0cac
commit
09ada3d10f
2 changed files with 41 additions and 106 deletions
69
encode.cc
69
encode.cc
|
|
@ -31,7 +31,7 @@ struct Encoder
|
|||
static const int guard_len = symbol_len / 8;
|
||||
static const int bits_max = 65536;
|
||||
static const int data_max = 1024;
|
||||
static const int cols_max = 273 + 16;
|
||||
static const int cols_max = 273 + 32;
|
||||
static const int mls0_len = 320;
|
||||
static const int mls0_poly = 0b1100110001;
|
||||
static const int mls0_seed = 214;
|
||||
|
|
@ -116,8 +116,8 @@ struct Encoder
|
|||
value scale = 2;
|
||||
for (int i = 0; i < symbol_len; ++i)
|
||||
tdom[i] /= scale * std::sqrt(value(symbol_len));
|
||||
clipping_and_filtering(scale, oper_mode > 25 && papr_reduction);
|
||||
if (oper_mode > 25 && papr_reduction)
|
||||
clipping_and_filtering(scale, oper_mode > 0 && papr_reduction);
|
||||
if (oper_mode > 0 && papr_reduction)
|
||||
tone_reservation();
|
||||
auto clamp = [](value v){ return v < value(-1) ? value(-1) : v > value(1) ? value(1) : v; };
|
||||
for (int i = 0; i < symbol_len; ++i)
|
||||
|
|
@ -186,7 +186,7 @@ struct Encoder
|
|||
fdom[bin(i+mls1_off)] *= fdom[bin(i-1+mls1_off)];
|
||||
for (int i = 0; i < mls1_len; ++i)
|
||||
fdom[bin(i+mls1_off)] *= nrz(seq1());
|
||||
if (oper_mode > 25) {
|
||||
if (oper_mode > 0) {
|
||||
for (int i = code_off; i < code_off + cons_cols; ++i) {
|
||||
if (i == mls1_off-1)
|
||||
i += mls1_len + 1;
|
||||
|
|
@ -265,7 +265,7 @@ struct Encoder
|
|||
{
|
||||
const uint32_t *frozen_bits = nullptr;
|
||||
int code_cols = 0;
|
||||
int comb_cols = 0;
|
||||
int comb_cols = 32;
|
||||
int comb_dist = 1;
|
||||
int comb_off = 1;
|
||||
int data_bits = 0;
|
||||
|
|
@ -273,71 +273,65 @@ struct Encoder
|
|||
switch (oper_mode) {
|
||||
case 0:
|
||||
code_cols = 256;
|
||||
comb_cols = 0;
|
||||
break;
|
||||
case 23:
|
||||
mod_bits = 2;
|
||||
cons_rows = 8;
|
||||
comb_cols = 0;
|
||||
code_order = 12;
|
||||
code_cols = 256;
|
||||
data_bits = 2048;
|
||||
reserved_tones = 0;
|
||||
reserved_tones = 32;
|
||||
frozen_bits = frozen_4096_2080;
|
||||
break;
|
||||
case 24:
|
||||
mod_bits = 2;
|
||||
cons_rows = 16;
|
||||
comb_cols = 0;
|
||||
code_order = 13;
|
||||
code_cols = 256;
|
||||
data_bits = 4096;
|
||||
reserved_tones = 0;
|
||||
reserved_tones = 32;
|
||||
frozen_bits = frozen_8192_4128;
|
||||
break;
|
||||
case 25:
|
||||
mod_bits = 2;
|
||||
cons_rows = 32;
|
||||
comb_cols = 0;
|
||||
code_order = 14;
|
||||
code_cols = 256;
|
||||
data_bits = 8192;
|
||||
reserved_tones = 0;
|
||||
reserved_tones = 32;
|
||||
frozen_bits = frozen_16384_8224;
|
||||
break;
|
||||
case 26:
|
||||
mod_bits = 4;
|
||||
cons_rows = 4;
|
||||
comb_cols = 8;
|
||||
code_order = 12;
|
||||
code_cols = 256;
|
||||
data_bits = 2048;
|
||||
reserved_tones = 8;
|
||||
reserved_tones = 32;
|
||||
frozen_bits = frozen_4096_2080;
|
||||
break;
|
||||
case 27:
|
||||
mod_bits = 4;
|
||||
cons_rows = 8;
|
||||
comb_cols = 8;
|
||||
code_order = 13;
|
||||
code_cols = 256;
|
||||
data_bits = 4096;
|
||||
reserved_tones = 8;
|
||||
reserved_tones = 32;
|
||||
frozen_bits = frozen_8192_4128;
|
||||
break;
|
||||
case 28:
|
||||
mod_bits = 4;
|
||||
cons_rows = 16;
|
||||
comb_cols = 8;
|
||||
code_order = 14;
|
||||
code_cols = 256;
|
||||
data_bits = 8192;
|
||||
reserved_tones = 8;
|
||||
reserved_tones = 32;
|
||||
frozen_bits = frozen_16384_8224;
|
||||
break;
|
||||
case 29:
|
||||
mod_bits = 6;
|
||||
cons_rows = 5;
|
||||
comb_cols = 16;
|
||||
code_order = 13;
|
||||
code_cols = 273;
|
||||
data_bits = 4096;
|
||||
|
|
@ -347,7 +341,6 @@ struct Encoder
|
|||
case 30:
|
||||
mod_bits = 6;
|
||||
cons_rows = 10;
|
||||
comb_cols = 16;
|
||||
code_order = 14;
|
||||
code_cols = 273;
|
||||
data_bits = 8192;
|
||||
|
|
@ -420,11 +413,7 @@ struct Encoder
|
|||
CODE::MLS seq0(mls0_poly);
|
||||
for (int j = 0, k = 0; j < cons_rows; ++j) {
|
||||
for (int i = 0; i < cons_cols; ++i) {
|
||||
if (oper_mode < 26) {
|
||||
prev[i] *= mod_map(perm+k);
|
||||
fdom[bin(i+code_off)] = prev[i];
|
||||
k += mod_bits;
|
||||
} else if (i % comb_dist == comb_off) {
|
||||
if (i % comb_dist == comb_off) {
|
||||
prev[i] *= nrz(seq0());
|
||||
fdom[bin(i+code_off)] = prev[i];
|
||||
} else {
|
||||
|
|
@ -490,39 +479,11 @@ int main(int argc, char **argv)
|
|||
return 1;
|
||||
}
|
||||
|
||||
int band_width;
|
||||
switch (oper_mode) {
|
||||
case 0:
|
||||
band_width = 1600;
|
||||
break;
|
||||
case 23:
|
||||
band_width = 1600;
|
||||
break;
|
||||
case 24:
|
||||
band_width = 1600;
|
||||
break;
|
||||
case 25:
|
||||
band_width = 1600;
|
||||
break;
|
||||
case 26:
|
||||
band_width = 1700;
|
||||
break;
|
||||
case 27:
|
||||
band_width = 1700;
|
||||
break;
|
||||
case 28:
|
||||
band_width = 1700;
|
||||
break;
|
||||
case 29:
|
||||
band_width = 1900;
|
||||
break;
|
||||
case 30:
|
||||
band_width = 1900;
|
||||
break;
|
||||
default:
|
||||
if (oper_mode && (oper_mode < 23 || oper_mode > 30)) {
|
||||
std::cerr << "Unsupported operation mode." << std::endl;
|
||||
return 1;
|
||||
}
|
||||
int band_width = 2000;
|
||||
if ((output_chan == 1 && freq_off < band_width / 2) || freq_off < band_width / 2 - output_rate / 2 || freq_off > output_rate / 2 - band_width / 2) {
|
||||
std::cerr << "Unsupported frequency offset." << std::endl;
|
||||
return 1;
|
||||
|
|
|
|||
Loading…
Add table
Add a link
Reference in a new issue