CRANK_NICHOLSON

使用matlab编辑音频信号，音频读写，录制与播放(read,write,record and play audio files with matlab)

PTS算法降低ofdm系统中的峰均功率比(PTS algorithm reduces PAPR ofdm system)

This document illustrates SWOT analysis of a telecommunication company namely Telenor Pvt Limited

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. )

分别用非参数化谱估计中的直接法，间接法和加窗法对离散随机过程的已零均值化的N个数据样本估计了离散信号的谱密度。(Were non-parametric spectral estimation of the direct method, indirect method and windowing method, discrete stochastic process has zero mean the data of the N-sample estimates of the spectral density of discrete signals.)

Two files 1. Data for Single machine Infinite Bus bar of power system. the generator data is based on MMF method which is described in Kundur, Power System Stability. 2. performance of Power System Stabilizer (PSS) for inter-area oscillations. The two area system is based on the example given in Kundur, Power System Stability.

this program is about the BER of ofdm_4QAM. I hope it will do a little help for somebody .

Its a source code in MATLAB

李源著的《逆合成孔径雷达理论与对抗》源代码 国防工业出版社出版(Li Yuan with the "inverse synthetic aperture radar theory and confrontation" source code Defense Industry Publishing)

本程序主要针对数据处理中相关矩阵的计算进行编写！(This program is mainly for calculating the correlation matrix be written)