sound

Tschebyscheff滤波器设计，包括零极点分布，幅值相位的关系。(Tschebyscheff filter design, including the zero-pole distribution, the amplitude-phase relationship.)

LDPC codes .Using the matlab.

This code is for quadtree partitioning of image...

error diffusion2 in matlab

MIMO-有关差分编码,用matlab书写,(MIMO-related differential coding, using Matlab writing,)

首先根据短训练字的特性进行相关运算，进行信号到达检测，当检测到相关值大于门限一定次数后，认为有信号到达。然后根据长训练字的特性，进行相关运算，进行OFDM符号FFT窗口起始位置的估计。估计出FFT窗口的位置后，先在时域进行小频偏的估计，将两个长训练字进行小频偏补偿后，进行FFT运算，根据FFT运算的结果进行整数倍频偏的估计。这些参数估计完成后，就可以进行数据解调了。先对数据部分进行完整的频偏补偿，然后根据估计的FFT窗口位置进行FFT运算得到频域的数据，进行解调。然后在对应于导频的子载波位置上提取出导频信息，根据导频信息估计出剩余定时误差以及剩余的信道响应误差，将误差量送入环路进行跟踪。当收到所有数据后，重新回到信号到达检测状态，进行下一次信号到达的检测和信号接收。(First, according to the characteristics of the short training word correlation operation, the signal reaching the detector, when the detected correlation value is greater than the threshold after a certain number of times that a signal arrives. And then the characteristics of long training word, the correlation operation for the FFT window starting position of an OFDM symbol estimate. The estimated position of the FFT window, the first small frequency offset in the time domain estimation, the two long training word small frequency offset compensation, the FFT operation, the FFT result of the operation for integer frequency offset estimate. These parameter estimation is completed, the data can be demodulated on. The first portion of the data for a complete frequency offset compensation, and based on the estimated FFT window position of the FFT operation to obtain frequency domain data, demodulated. Then corresponding to the position of the pilot subcarriers are extracted on pilot inform)

这个文章是关于基本matlab函数优化的讲解，新手和老手都会从中得益。(This article is about the basic matlab function optimization explanations, novices and old hands will benefit from it.)

可以定位彩色车牌.而且定位的准确率是比其它的定位方法要高一些. (location )

水纹干涉图样. 可以自由设置两个波源的位置,振幅以及频率.形成水纹干涉图样并动画展示.(Waterlines interference pattern. the two wave source location, amplitude and frequency can be set freely . )

ittc标准海浪谱的matlab实现，对工程人员作干扰仿真特别有用。(wave spectrum of ittc s standard matlab realization.it is particularly useful for the project staff.)