A failed attempt to build a case of QPSK modulation and demodulation case

[hydrogen0392]

I tried to use these functions to build a QPSK modulation and demodulation case, but the demodulation results and the input data are very different, the main program is as follows, I think it is the function parameter setting problem, hope the author can point out the error or provide a correct QPSK modulation and demodulation case, thank you very much!

`#include <stdlib.h>
#include <stdint.h>
#include <math.h>
#include "butterworth_filter.h"
#include "rrc_filter.h"
#include "qpsk_modulator.h"
#include "bytes_symbols_converter.h"
#include "file_reader.h"
#include "qpsk_demodulator.h"
#include "pll.h"
#include "butterworth_filter.h"

int main() {

read_file();
uint32_t bytes_length = file_len;
uint32_t start_silence_length = 10;
uint32_t preamble_length = 10;
uint8_t add_iq_sync_byte = 1;
uint32_t end_silence_length = 10;

uint8_t* symbols = bytes_to_symbols(file_buf, bytes_length, start_silence_length, preamble_length, add_iq_sync_byte, end_silence_length);

uint32_t symbols_length = bytes_to_symbols_calculate_length(bytes_length, start_silence_length, preamble_length, add_iq_sync_byte, end_silence_length);

//初始化QPSK调制器
qpsk_modulator_s* qpsk_modulator = qpsk_modulator_init(10000,5000,2000,2,100.0);

// 计算所需的样本数
uint32_t samples_length = qpsk_modulator_calculate_samples_chunk_length(qpsk_modulator, symbols_length);

// 为 IQ 样本序列分配内存
float* samples_chunk = malloc(samples_length * sizeof(float));

// 调制符号
qpsk_modulator_modulate_chunk(qpsk_modulator, symbols, symbols_length, samples_chunk, 1);

// 初始化 QPSK 解调器
uint8_t* symbols_demodulate = malloc(samples_length * sizeof(uint8_t));

qpsk_demodulator_s* qpsk_demodulator = qpsk_demodulator_init(10000, 5000, 2000, 2, -1, 1, 1e4, 1e-6);

qpsk_demodulator_demodulate_chunk(qpsk_demodulator, samples_chunk, samples_length, symbols_demodulate, 1);

uint8_t* symbols_demodulate2 = malloc(symbols_length * sizeof(uint8_t));

symbols_demodulate2 = symbols_remove_empty(symbols_demodulate2, symbols_length);

symbols_demodulate2 = symbols_to_bytes(symbols_demodulate, symbols_length);

return 0;

}`