LEO_Channel_MU

说明：  本程序研究IQ误差对线性调频信号匹配滤波的影响，仿真匹配滤波后信号幅相误差特性，仿真主瓣宽度、旁瓣电平的变化(This program studies the influence of IQ error on matched filtering of chirp signal, simulates the characteristics of signal amplitude and phase error after matched filtering, and simulates the change of main lobe width and side lobe level)

ＯＦＤＭ程序　波形如下 子载波数 128 ％ 位数/ 符号 2 ％ 符号数/ 载波 100 ％ 训练符号数 0 ％ 循环前缀长度 8 (1/16)*T ％ 调制方式 4-QAM ％ 多径信道数 3 ％IFFT Size 128 ％ 信道最大时延 2(OFDM waveform procedures following subcarriers median number of 128%/2% Symbol Symbol/Carrier 100% Training a few symbols 0% cyclic prefix length 8 (1/16)* T% modulation 4-QAM% multi-path channel number 3% IFFT Size 128% maximum delay Channel 2)

说明：  用于计算gps系统时间，gps周、周内秒,以及约化儒略日(Used to calculate GPS system time, GPS cycle, intra-week seconds, and Julian Day)

西门子GPRS 调制解调器编程参考手册，型号TC35(Siemens GPRS modem programming reference manual, model TC35)

MODBUS协议详细 三部分 GB-T19582 国标(MODBUS protocol detailed three parts GB-T19582)

说明：  原始信号加载高斯白噪声和椒盐噪声后用维纳滤波器滤波(The original signal was loaded with White Gaussian noise and salt noise and then filtered by Wiener filter)

用Rayleigh-Normal模型仿真对数正态信道模型(Model simulation with Rayleigh-Normal lognormal channel model)

A source code of international Chin chess, have the referenc

采用多相滤波结构进行仿真实验，先三倍抽取，后八倍内插(The simulation experiment is carried out using a polyphase filter structure, which is first extracted three times and interpolated eight times later)

MIMO-OFDM信道估计，用于最小二乘法和线性最小均方估计方法的性能比较(MIMO-OFDM channel estimation for the linear least squares method and the least square method estimates Performance Comparison)