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changed four QPSK symbols to two QAM16 symbols

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Ahmet Inan 2023-12-15 19:14:58 +01:00
commit cd9d912711
3 changed files with 265 additions and 9 deletions
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7
encode.cc
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@ -18,6 +18,7 @@ Copyright 2021 Ahmet Inan <inan@aicodix.de>
#include "mls.hh"
#include "crc.hh"
#include "psk.hh"
#include "qam.hh"
#include "polar_tables.hh"
#include "polar_helper.hh"
#include "polar_encoder.hh"
@ -27,14 +28,14 @@ template <typename value, typename cmplx, int rate>
struct Encoder
{
typedef int8_t code_type;
static const int mod_bits = 2;
static const int mod_bits = 4;
static const int code_order = 11;
static const int code_len = 1 << code_order;
static const int symbol_len = (1280 * rate) / 8000;
static const int guard_len = symbol_len / 8;
static const int max_bits = 1360 + 32;
static const int cons_cols = 256;
static const int cons_rows = 4;
static const int cons_rows = 2;
static const int mls0_len = 127;
static const int mls0_poly = 0b10001001;
static const int mls1_len = 255;
@ -187,7 +188,7 @@ struct Encoder
}
cmplx mod_map(code_type *b)
{
return PhaseShiftKeying<4, cmplx, code_type>::map(b);
return QuadratureAmplitudeModulation<16, cmplx, code_type>::map(b);
}
Encoder(DSP::WritePCM<value> *pcm, const uint8_t *inp, int freq_off, uint64_t call_sign, int oper_mode, int reserved_tones) :
pcm(pcm), crc0(0xA8F4), crc1(0x8F6E37A0), bchenc({