LDPC码

CDMA系统中几种功率分配的算法。功率控制提高信道容量(CDMA system, several power allocation algorithms. Power control to improve channel capacity)

ASK系统的设计与仿真，相干解调及误码率的计算(Ask system design and simulation of coherent demodulation and the calculation of the bit error rate in English)

说明：  该文件LDPC码的校验矩阵的matlab代码，可以使用该校验矩阵得到规则LDPC码。(Matlab code of LDPC check matrix)

设计一个巴特沃兹数字低通滤波器，其技术指标为：3dB带宽为0.2π，阻带截止频率为0.3π，通带纹波为1dB，阻带衰减大于30dB，采样间隔T=10ms。 1）采用冲激响应不变法； 2）采用双线性变换法设计； 3）采用FIR的窗函数（Hanning窗、Hamming窗或Blackman窗）设计。(A Butterworth digital low-pass filter is designed. Its technical specifications are: 3 dB bandwidth is 0.2 pi, stopband cut-off frequency is 0.3 pi, passband ripple is 1 dB, stopband attenuation is more than 30 dB, sampling interval T=10 Ms. 1) Impulse response invariance method is adopted. 2) Design by bilinear transformation method; 3) FIR window function (Hanning window, Hamming window or Blackman window) is used to design.)

ZigBee 短距离、低速率无线网络技术快速入门指南(ZigBee short-range, low-rate wireless network technology, Quick Start Guide)

信道检错编码，CRC编码，包括详细的注释，很不错的程序(Channel error detection codes, CRC codes, including detailed notes, a very good program)

用matlab仿真零均值高斯白噪声通过低通带通滤波器前后特性，程序完善，结果与理论值非常接近(The zero mean white Gauss noise is simulated by MATLAB, and the program is perfect through the low pass bandpass filter. The result is very close to the theoretical value.)

一个用MATLAB编写的，上变频为2.5GHz的OFDM仿真程序，很好用的程序，适合学习OFDM初学者(A MATLAB prepared, the frequency of 2.5 GHz OFDM simulation program, very good procedures, suitable for OFDM beginners to learn)

vc++开发的socket通信类（含客户端和服务端）(socket communication(include client and server))

用于描述通讯中常用的RS编码原理，以及MATLBA仿真实例(Used to describe communication RS coding theory, and simulation MATLBA instance)