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added some more modes

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This commit is contained in:
Ahmet Inan 2025-07-05 10:33:17 +02:00
commit 0cf1e2f3fe
4 changed files with 185 additions and 55 deletions
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46
README.md vendored
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@ -43,21 +43,37 @@ diff -s uncoded.dat decoded.dat
All modes need a bandwidth of 2000 Hz and use a 1/2-rate forward error correction code All modes need a bandwidth of 2000 Hz and use a 1/2-rate forward error correction code
* Mode 1: QPSK, 1.02 seconds and 128 bytes These use a differential modulation scheme:
* Mode 2: QPSK, 1.70 seconds and 256 bytes * Mode 0: DBPSK, 1.70 seconds and 128 bytes
* Mode 3: QPSK, 3.06 seconds and 512 bytes * Mode 1: DBPSK, 3.06 seconds and 256 bytes
* Mode 4: QPSK, 5.78 seconds and 1024 bytes * Mode 2: DBPSK, 5.78 seconds and 512 bytes
* Mode 5: QAM16, 1.02 seconds and 256 bytes * Mode 3: DQPSK, 1.02 seconds and 128 bytes
* Mode 6: QAM16, 1.70 seconds and 512 bytes * Mode 4: DQPSK, 1.70 seconds and 256 bytes
* Mode 7: QAM16, 3.06 seconds and 1024 bytes * Mode 5: DQPSK, 3.06 seconds and 512 bytes
* Mode 8: QAM16, 5.78 seconds and 2048 bytes * Mode 6: DQPSK, 5.78 seconds and 1024 bytes
* Mode 9: QAM64, 2.21 seconds and 1024 bytes * Mode 7: D8PSK, 2.21 seconds and 512 bytes
* Mode 10: QAM64, 4.08 seconds and 2048 bytes * Mode 8: D8PSK, 4.08 seconds and 1024 bytes
* Mode 11: QAM64, 7.82 seconds and 4096 bytes * Mode 9: D8PSK, 7.82 seconds and 2048 bytes
* Mode 12: QAM256, 1.02 seconds and 512 bytes
* Mode 13: QAM256, 1.70 seconds and 1024 bytes And these a coherent modulation scheme:
* Mode 14: QAM256, 3.06 seconds and 2048 bytes * Mode 10: BPSK, 1.70 seconds and 128 bytes
* Mode 15: QAM256, 5.78 seconds and 4096 bytes * Mode 11: BPSK, 3.06 seconds and 256 bytes
* Mode 12: BPSK, 5.78 seconds and 512 bytes
* Mode 13: QPSK, 1.02 seconds and 128 bytes
* Mode 14: QPSK, 1.70 seconds and 256 bytes
* Mode 15: QPSK, 3.06 seconds and 512 bytes
* Mode 16: QPSK, 5.78 seconds and 1024 bytes
* Mode 17: QAM16, 1.02 seconds and 256 bytes
* Mode 18: QAM16, 1.70 seconds and 512 bytes
* Mode 19: QAM16, 3.06 seconds and 1024 bytes
* Mode 20: QAM16, 5.78 seconds and 2048 bytes
* Mode 21: QAM64, 2.21 seconds and 1024 bytes
* Mode 22: QAM64, 4.08 seconds and 2048 bytes
* Mode 23: QAM64, 7.82 seconds and 4096 bytes
* Mode 24: QAM256, 1.02 seconds and 512 bytes
* Mode 25: QAM256, 1.70 seconds and 1024 bytes
* Mode 26: QAM256, 3.06 seconds and 2048 bytes
* Mode 27: QAM256, 5.78 seconds and 4096 bytes
### Simulating ### Simulating

215
common.hh
View file

@ -40,6 +40,7 @@ struct Common
int pilot_off; int pilot_off;
int reserved_off; int reserved_off;
int symbol_count; int symbol_count;
bool differential;
Common() : crc0(0x8F6E37A0) {} Common() : crc0(0x8F6E37A0) {}
@ -47,109 +48,225 @@ struct Common
{ {
switch (oper_mode) { switch (oper_mode) {
case 0: case 0:
symbol_count = 1; mod_bits = 1;
break; symbol_count = 8;
case 1: differential = true;
mod_bits = 2;
symbol_count = 4;
code_order = 11; code_order = 11;
data_bits = 1024; data_bits = 1024;
frozen_bits = frozen_2048_1056; frozen_bits = frozen_2048_1056;
break; break;
case 2: case 1:
mod_bits = 2; mod_bits = 1;
symbol_count = 8; symbol_count = 16;
differential = true;
code_order = 12; code_order = 12;
data_bits = 2048; data_bits = 2048;
frozen_bits = frozen_4096_2080; frozen_bits = frozen_4096_2080;
break; break;
case 2:
mod_bits = 1;
symbol_count = 32;
differential = true;
code_order = 13;
data_bits = 4096;
frozen_bits = frozen_8192_4128;
break;
case 3: case 3:
mod_bits = 2; mod_bits = 2;
symbol_count = 16; symbol_count = 4;
code_order = 13; differential = true;
data_bits = 4096; code_order = 11;
frozen_bits = frozen_8192_4128; data_bits = 1024;
frozen_bits = frozen_2048_1056;
break; break;
case 4: case 4:
mod_bits = 2; mod_bits = 2;
symbol_count = 32; symbol_count = 8;
code_order = 14; differential = true;
data_bits = 8192;
frozen_bits = frozen_16384_8224;
break;
case 5:
mod_bits = 4;
symbol_count = 4;
code_order = 12; code_order = 12;
data_bits = 2048; data_bits = 2048;
frozen_bits = frozen_4096_2080; frozen_bits = frozen_4096_2080;
break; break;
case 6: case 5:
mod_bits = 4; mod_bits = 2;
symbol_count = 8; symbol_count = 16;
differential = true;
code_order = 13; code_order = 13;
data_bits = 4096; data_bits = 4096;
frozen_bits = frozen_8192_4128; frozen_bits = frozen_8192_4128;
break; break;
case 7: case 6:
mod_bits = 4; mod_bits = 2;
symbol_count = 16; symbol_count = 32;
differential = true;
code_order = 14; code_order = 14;
data_bits = 8192; data_bits = 8192;
frozen_bits = frozen_16384_8224; frozen_bits = frozen_16384_8224;
break; break;
case 7:
mod_bits = 3;
symbol_count = 11;
differential = true;
code_order = 13;
data_bits = 4096;
frozen_bits = frozen_8192_4128;
break;
case 8: case 8:
mod_bits = 4; mod_bits = 3;
symbol_count = 32; symbol_count = 22;
code_order = 15; differential = true;
data_bits = 16384;
frozen_bits = frozen_32768_16416;
break;
case 9:
mod_bits = 6;
symbol_count = 11;
code_order = 14; code_order = 14;
data_bits = 8192; data_bits = 8192;
frozen_bits = frozen_16384_8224; frozen_bits = frozen_16384_8224;
break; break;
case 10: case 9:
mod_bits = 6; mod_bits = 3;
symbol_count = 22; symbol_count = 44;
differential = true;
code_order = 15; code_order = 15;
data_bits = 16384; data_bits = 16384;
frozen_bits = frozen_32768_16416; frozen_bits = frozen_32768_16416;
break; break;
case 10:
mod_bits = 1;
symbol_count = 8;
differential = true;
code_order = 11;
data_bits = 1024;
frozen_bits = frozen_2048_1056;
break;
case 11: case 11:
mod_bits = 6; mod_bits = 1;
symbol_count = 44; symbol_count = 16;
code_order = 16; differential = true;
data_bits = 32768; code_order = 12;
frozen_bits = frozen_65536_32800; data_bits = 2048;
frozen_bits = frozen_4096_2080;
break; break;
case 12: case 12:
mod_bits = 8; mod_bits = 1;
symbol_count = 4; symbol_count = 32;
differential = true;
code_order = 13; code_order = 13;
data_bits = 4096; data_bits = 4096;
frozen_bits = frozen_8192_4128; frozen_bits = frozen_8192_4128;
break; break;
case 13: case 13:
mod_bits = 8; mod_bits = 2;
symbol_count = 4;
differential = false;
code_order = 11;
data_bits = 1024;
frozen_bits = frozen_2048_1056;
break;
case 14:
mod_bits = 2;
symbol_count = 8; symbol_count = 8;
differential = false;
code_order = 12;
data_bits = 2048;
frozen_bits = frozen_4096_2080;
break;
case 15:
mod_bits = 2;
symbol_count = 16;
differential = false;
code_order = 13;
data_bits = 4096;
frozen_bits = frozen_8192_4128;
break;
case 16:
mod_bits = 2;
symbol_count = 32;
differential = false;
code_order = 14; code_order = 14;
data_bits = 8192; data_bits = 8192;
frozen_bits = frozen_16384_8224; frozen_bits = frozen_16384_8224;
break; break;
case 14: case 17:
mod_bits = 8; mod_bits = 4;
symbol_count = 4;
differential = false;
code_order = 12;
data_bits = 2048;
frozen_bits = frozen_4096_2080;
break;
case 18:
mod_bits = 4;
symbol_count = 8;
differential = false;
code_order = 13;
data_bits = 4096;
frozen_bits = frozen_8192_4128;
break;
case 19:
mod_bits = 4;
symbol_count = 16; symbol_count = 16;
differential = false;
code_order = 14;
data_bits = 8192;
frozen_bits = frozen_16384_8224;
break;
case 20:
mod_bits = 4;
symbol_count = 32;
differential = false;
code_order = 15; code_order = 15;
data_bits = 16384; data_bits = 16384;
frozen_bits = frozen_32768_16416; frozen_bits = frozen_32768_16416;
break; break;
case 15: case 21:
mod_bits = 6;
symbol_count = 11;
differential = false;
code_order = 14;
data_bits = 8192;
frozen_bits = frozen_16384_8224;
break;
case 22:
mod_bits = 6;
symbol_count = 22;
differential = false;
code_order = 15;
data_bits = 16384;
frozen_bits = frozen_32768_16416;
break;
case 23:
mod_bits = 6;
symbol_count = 44;
differential = false;
code_order = 16;
data_bits = 32768;
frozen_bits = frozen_65536_32800;
break;
case 24:
mod_bits = 8;
symbol_count = 4;
differential = false;
code_order = 13;
data_bits = 4096;
frozen_bits = frozen_8192_4128;
break;
case 25:
mod_bits = 8;
symbol_count = 8;
differential = false;
code_order = 14;
data_bits = 8192;
frozen_bits = frozen_16384_8224;
break;
case 26:
mod_bits = 8;
symbol_count = 16;
differential = false;
code_order = 15;
data_bits = 16384;
frozen_bits = frozen_32768_16416;
break;
case 27:
mod_bits = 8; mod_bits = 8;
symbol_count = 32; symbol_count = 32;
differential = false;
code_order = 16; code_order = 16;
data_bits = 32768; data_bits = 32768;
frozen_bits = frozen_65536_32800; frozen_bits = frozen_65536_32800;

12
decode.cc
View file

@ -88,8 +88,12 @@ struct Decoder : Common
void demap_bits(code_type *b, cmplx c, value precision, int bits) void demap_bits(code_type *b, cmplx c, value precision, int bits)
{ {
switch (bits) { switch (bits) {
case 1:
return PhaseShiftKeying<2, cmplx, code_type>::soft(b, c, precision);
case 2: case 2:
return PhaseShiftKeying<4, cmplx, code_type>::soft(b, c, precision); return PhaseShiftKeying<4, cmplx, code_type>::soft(b, c, precision);
case 3:
return PhaseShiftKeying<8, cmplx, code_type>::soft(b, c, precision);
case 4: case 4:
return QuadratureAmplitudeModulation<16, cmplx, code_type>::soft(b, c, precision); return QuadratureAmplitudeModulation<16, cmplx, code_type>::soft(b, c, precision);
case 6: case 6:
@ -181,13 +185,11 @@ struct Decoder : Common
for (int i = 0; i < pilot_tones; ++i) for (int i = 0; i < pilot_tones; ++i)
mode[i] = clamp(std::nearbyint(127 * demod_or_erase(tone[i*block_length+first_pilot], chan[i*block_length+first_pilot]).real() * nrz(seq1()))); mode[i] = clamp(std::nearbyint(127 * demod_or_erase(tone[i*block_length+first_pilot], chan[i*block_length+first_pilot]).real() * nrz(seq1())));
int oper_mode = hadamard_decoder(mode); int oper_mode = hadamard_decoder(mode);
if (oper_mode < 0 || oper_mode > 15) { if (oper_mode < 0 || oper_mode > 27) {
std::cerr << "operation mode " << oper_mode << " unsupported." << std::endl; std::cerr << "operation mode " << oper_mode << " unsupported." << std::endl;
continue; continue;
} }
std::cerr << "oper mode: " << oper_mode << std::endl; std::cerr << "oper mode: " << oper_mode << std::endl;
if (!oper_mode)
continue;
setup(oper_mode); setup(oper_mode);
std::cerr << "Es/N0 (dB):"; std::cerr << "Es/N0 (dB):";
for (int j = 0, k = 0; j < symbol_count; ++j) { for (int j = 0, k = 0; j < symbol_count; ++j) {
@ -242,7 +244,9 @@ struct Decoder : Common
if (i % block_length == reserved_off) if (i % block_length == reserved_off)
continue; continue;
int bits = mod_bits; int bits = mod_bits;
if (oper_mode >= 9 && oper_mode <= 11 && k % 64 == 60) if (oper_mode >= 7 && oper_mode <= 9 && k % 32 == 30)
bits = 2;
if (oper_mode >= 21 && oper_mode <= 23 && k % 64 == 60)
bits = 4; bits = 4;
demap_bits(perm+k, demod[i], precision, bits); demap_bits(perm+k, demod[i], precision, bits);
k += bits; k += bits;

35
encode.cc
View file

@ -147,8 +147,12 @@ struct Encoder : public Common
cmplx map_bits(code_type *b, int bits) cmplx map_bits(code_type *b, int bits)
{ {
switch (bits) { switch (bits) {
case 1:
return PhaseShiftKeying<2, cmplx, code_type>::map(b);
case 2: case 2:
return PhaseShiftKeying<4, cmplx, code_type>::map(b); return PhaseShiftKeying<4, cmplx, code_type>::map(b);
case 3:
return PhaseShiftKeying<8, cmplx, code_type>::map(b);
case 4: case 4:
return QuadratureAmplitudeModulation<16, cmplx, code_type>::map(b); return QuadratureAmplitudeModulation<16, cmplx, code_type>::map(b);
case 6: case 6:
@ -161,8 +165,12 @@ struct Encoder : public Common
value mod_distance() value mod_distance()
{ {
switch (mod_bits) { switch (mod_bits) {
case 1:
return PhaseShiftKeying<2, cmplx, code_type>::DIST;
case 2: case 2:
return PhaseShiftKeying<4, cmplx, code_type>::DIST; return PhaseShiftKeying<4, cmplx, code_type>::DIST;
case 3:
return PhaseShiftKeying<8, cmplx, code_type>::DIST;
case 4: case 4:
return QuadratureAmplitudeModulation<16, cmplx, code_type>::DIST; return QuadratureAmplitudeModulation<16, cmplx, code_type>::DIST;
case 6: case 6:
@ -234,20 +242,7 @@ struct Encoder : public Common
guard_interval_weights(); guard_interval_weights();
papr_min = 1000, papr_max = -1000; papr_min = 1000, papr_max = -1000;
leading_noise(); leading_noise();
if (oper_mode) { hadamard_encoder(mode, oper_mode);
hadamard_encoder(mode, oper_mode);
} else {
schmidl_cox();
CODE::MLS seq1(mls1_poly);
for (int i = 0; i < tone_count; ++i) {
if (i % block_length == first_pilot) {
tone[i] = nrz(seq1());
} else {
tone[i] = 0;
}
}
symbol(false);
}
for (int input_index = 0; input_index < input_count; ++input_index) { for (int input_index = 0; input_index < input_count; ++input_index) {
const char *input_name = input_names[input_index]; const char *input_name = input_names[input_index];
if (input_count == 1 && input_name[0] == '-' && input_name[1] == 0) if (input_count == 1 && input_name[0] == '-' && input_name[1] == 0)
@ -283,7 +278,9 @@ struct Encoder : public Common
tone[i] = 0; tone[i] = 0;
} else { } else {
int bits = mod_bits; int bits = mod_bits;
if (oper_mode >= 9 && oper_mode <= 11 && k % 64 == 60) if (oper_mode >= 7 && oper_mode <= 9 && k % 32 == 30)
bits = 2;
if (oper_mode >= 21 && oper_mode <= 23 && k % 64 == 60)
bits = 4; bits = 4;
tone[i] = map_bits(perm+k, bits); tone[i] = map_bits(perm+k, bits);
k += bits; k += bits;
@ -302,7 +299,7 @@ struct Encoder : public Common
int main(int argc, char **argv) int main(int argc, char **argv)
{ {
if (argc < 7) { if (argc < 8) {
std::cerr << "usage: " << argv[0] << " OUTPUT RATE BITS CHANNELS OFFSET MODE INPUT.." << std::endl; std::cerr << "usage: " << argv[0] << " OUTPUT RATE BITS CHANNELS OFFSET MODE INPUT.." << std::endl;
return 1; return 1;
} }
@ -321,11 +318,7 @@ int main(int argc, char **argv)
} }
int input_count = argc - 7; int input_count = argc - 7;
int oper_mode = std::atoi(argv[6]); int oper_mode = std::atoi(argv[6]);
if (!oper_mode != !input_count) { if (oper_mode < 0 || oper_mode > 27) {
std::cerr << "Using operation mode " << oper_mode << " but " << input_count << " input file" << (input_count == 1 ? "" : "s") << " provided." << std::endl;
return 1;
}
if (oper_mode < 0 || oper_mode > 15) {
std::cerr << "Unsupported operation mode." << std::endl; std::cerr << "Unsupported operation mode." << std::endl;
return 1; return 1;
} }