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reduced guard interval to 1/16

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This commit is contained in:
Ahmet Inan 2025-07-01 13:08:11 +02:00
commit f0f0aace39
2 changed files with 6 additions and 6 deletions
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4
decode.cc
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@ -41,9 +41,9 @@ struct Decoder
typedef SIMD<code_type, 16 / sizeof(code_type)> mesg_type;
#endif
typedef DSP::Const<value> Const;
static const int symbol_len = (1280 * rate) / 8000;
static const int guard_len = rate / 100;
static const int symbol_len = guard_len * 16;
static const int filter_len = (((21 * rate) / 8000) & ~3) | 1;
static const int guard_len = symbol_len / 8;
static const int extended_len = symbol_len + guard_len;
static const int mod_max = 6;
static const int code_max = 16;

8
encode.cc
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@ -27,8 +27,8 @@ template <typename value, typename cmplx, int rate>
struct Encoder
{
typedef int8_t code_type;
static const int symbol_len = (1280 * rate) / 8000;
static const int guard_len = symbol_len / 8;
static const int guard_len = rate / 100;
static const int symbol_len = guard_len * 16;
static const int bits_max = 65536;
static const int data_max = 1024;
static const int mls0_poly = 0b1100110001;
@ -399,8 +399,8 @@ int main(int argc, char **argv)
int output_chan = std::atoi(argv[4]);
int freq_off = std::atoi(argv[5]);
if (freq_off % 50) {
std::cerr << "Frequency offset must be divisible by 50." << std::endl;
if (freq_off % 100) {
std::cerr << "Frequency offset must be divisible by 100." << std::endl;
return 1;
}
int input_count = argc - 7;