training_data

通过程序控制CMD程序的输出,并对其进行解析和过滤(CMD program through the control output, and its analysis and filtering)

Construct the short length of QC LDPC codes without girth 4 and girth 6(The Program to construct the short length of QC LDPC codes without girth 4 and girth 6 Copyright (C) Yang XIAO, Jun FAN, BJTU, July 26, 2007, E-Mail: yxiao@bjtu.edu.cn. This program presents an approach [1] for constructing the short length of LDPC codes with girth 8. First, we design 3 submatrices with different shifting functions given by our schemes, then combine them into a matrix according to our approach, finally, expand the matrix into a desired parity-check matrix using identity matrices and cyclic shift matrices of the identity matrices. The simulation results in AWGN channels show that the codes which can be obtained by the generator matrix derived from this check matrix for encoding the random information bits are as good as random LDPC codes [1]. Ref: [1] J. Fan, Y. Xiao, “A design of LDPC codes with large girth based on the sub-matrix shifting”, IET International Conference on Wireless Mobile and Multimedia Networks Proceedings (ICWMMN 2006), (CP525), p. )

改进cholesky分解，在cholesky分解基础之上进行改进，不需要分解的矩阵正定条件(Improve the cholesky decomposition, cholesky decomposition in the basis for improvement, positive definite matrix conditions without decomposition)

四种IIR滤波器的设计与性能对比（巴特沃斯，切比雪夫I、II型，椭圆滤波器）(The four IIR filter design and performance comparison (Butterworth, cut Chebyshev I, type II, elliptic filter))

模拟退火算法程序 模拟退火算法程序 模拟退火算法程序(Simulated annealing algorithm Simulated annealing algorithm)

SAR成像算法，个人理解后编写，注释清楚，对于初学者十分有帮助(Synthetic aperture radar imaging algorithm after understanding individual written comments clear, very helpful for beginners)

适用于matlab平台，用来模拟晶粒长大的源程序。(For matlab simulation of grain growth source program)

故障定位程序 主要应用于交流故障测距 在MATLAB环境下进行编译 (Fault Locator)

快速傅里叶变换 (FFT) 实现，给定信号x(t)=sin(2πf0t)，f0=50Hz，对x(t)以fs=200Hz进行抽样，抽样点数为N=16。编写程序实现对x(n)的快速傅里叶变换，求得相应的X(K)。(Fast Fourier Transform (FFT) to achieve a given signal x (t) = sin (2πf0t), f0 = 50Hz, for x (t) with fs = 200Hz sampling, the sampling points is N = 16. Procedures for the preparation of x (n) of the fast Fourier transform, obtained by the corresponding X (K).)

基于时延多信道和高斯噪声的QPSK调制解调系统的matlab算法仿真实现(matlab QPSK)