布谷鸟搜索算法

本程序为标准的微分进化算法，可以提供开发人员进行扩充。(differential evolution)

removing after shocks in earthquake catalouge

自己编写的二维傅里叶变换的源代码，并在变换后显示频谱。(Two-dimensional Fourier transform of the source code I have written, and displayed in the transformed spectrum.)

OFDM系统中，基于LS信道估计算法和MMSE信道估计算法的MSE分析和BER分析。(OFDM systems, channel estimation algorithm based on LS and MMSE channel estimation algorithms MSE analysis and BER analysis.)

说明：  主动噪声控制，消除单通道噪声中的声音，对次级路径进行实时的估计，得到精确的权值。(Active Noise Control)

说明：  设计双通道线性相位或低延迟PR滤波器组。(Design the two-channel linear-phase or low-delay PR filter banks. Give the filter coefficients of the lowpass and highpass analysis filters, and plot their frequency responses, amplitude distortion and aliasing distortion.)

说明：  EM 算法是Dempster，Laind，Rubin于1977年提出的求参数极大似然估计的一种方法，它可以从非完整数据集中对参数进行 MLE估计，是一种非常简单实用的学习算法。这种方法可以广泛地应用于处理缺损数据、截尾数据以及带有噪声等所谓的不完全数据，可以具体来说，我们可以利用EM算法来填充样本中的缺失数据、发现隐藏变量的值、估计HMM中的参数、估计有限混合分布中的参数以及可以进行无监督聚类等等。(EM algorithm is a method for maximum likelihood estimation of parameters proposed by Dempster, Laind and Rubin in 1977. It can estimate parameters from incomplete data sets by MLE. It is a very simple and practical learning algorithm. This method can be widely used in dealing with the so-called incomplete data such as defective data, censored data and noisy data. Specifically, we can use EM algorithm to fill missing data in samples, find hidden variable values, estimate parameters in HMM, estimate parameters in finite mixed distribution, and so on. Unsupervised clustering and so on.)

This matlab file simulates CDMA system, Modulator and Demodulator modules are also available for download

这是一个有关matlab的编程，是关于fm，dsb调制与解调的程序。(This is a question matlab programming is on the fm, dsb modulation and demodulation process.)

说明：  GPS噪音的matlab仿真的一个例子，结果正确。(GPS noise matlab simulation of an example of the results correctly.)