program-of-Matlab

该程序可以实现对于信号的时域参数提取以及信号的包络分析(The program can realize time domain parameter extraction of signals and envelope analysis of signals)

本程序是对旅行家问题的粒子群优化算法实现(This procedure is the issue of travelers Particle Swarm Optimization Algorithm)

The Interleaved Frequency Division Multiple Ac- cess (IFDMA) scheme is based on compression, repetition and subsequent user dependent frequency shift of a modulated signal. Multiple access is enabled by the assignment of overlapping but mutually orthogonal subcarriers to each user. In this paper it is shown that IFDMA can be regarded as unitary precoded OFDMA with interleaved subcarriers. On the other hand, IFDMA is shown to be a CDMA variant with frequency domain orthogonal signature sequences and chip interleaving. Thus, it combines the advantages of single and multi carrier transmission such as low peak to average power ratio, orthogonality of the signals of different users even for transmission over a time dispersive channel and low complexity. Simulation results show the good performance of coded IFDMA transmission over a mobile radio channel for different data rates.

说明：  利用锁相环，比较好的实现了载波同步。。。(PLL)

说明：  一个很好的东东哦 希望大家来看和下栽哈(a good Dongdong Oh, and hope that we look at Kazakhstan crashed)

velocity field using weather code

说明：  IIR 滤波器，matlab实现，载频21.4MHz,带宽200KHz(IIR bandpass filter with matlab language,frequence of 21.4MHz,band of 200KHz)

信号维数的估计，使用高阶累积量对MPSK信号进行调制识别，多抽样率信号处理。( Signal dimension estimates, Using high-order cumulants of MPSK signal modulation recognition, Multirate signal processing.)

说明：  】利用混沌动力学系统中logistic 映射先对水印图像进行置乱预处理以增强其鲁棒性, 在小波域中将原始音频信号按比例分段, 此比例为原始音频信号低频部分与水印信号个数之比, 然后将水印信号加入到音频信号的 低频部分。用StirMark 攻击后的实验结果表明, 该算法对StirMark 的部分攻击具有一定的鲁棒性。(The logistic- map sequences to encrypt the watermark are used. The original audio signal in DWT (Discrete Wavelet Transform) domain is seperated into some pieces determined by the ratio between the length of the low frequency parts and the length of the encrypted watermark. Every bit of the watermark is added into the relevant pieces of the low frequency parts in the DWT domain. Experimental results show that the algorithm is robust against some StirMark attacks.)

一种无线传感网络的LEACH分簇算法，大家都比较需要 (Wireless sensor networks LEACH clustering algorithm )