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直接序列扩频系统（DS，Direct Sequence）又称为直接序列调制系统或伪噪声系统（PN 系统），简称为直扩系统，是目前应用较为广泛的一种扩展频谱系统。要传送的信息经伪随机序列编码后对载波进行调制。在发信端越冬用扩频序列去扩展信号的频谱，在收信端，用相同的扩频友序列进行解扩，将展宽的频谱扩展信号还原成原始信号。因为伪随机序列的速率远大于要传送信息的速率，所以受调信号的频谱宽度将远大于要传送信息的频谱宽度，帮称之为扩频(Direct sequence spread spectrum (DS, Direct Sequence) modulation system, also known as direct sequence or pseudo-noise system (PN system), referred to as direct expansion systems, is currently the more widely used as a spread spectrum system. To send the information encoded by the pseudo-random sequence of carrier modulation. End of winter in the letter to extend the signal with the spreading sequence of spectrum, in the end prepared to receive and use the same sequence spread spectrum despreading friends, broadening the spectrum to restore the original signal expansion signals. Because the rate of pseudo-random sequence is much larger than the rate of information to be sent, so the frequency spectrum by adjusting the width of the spectrum is much larger than the width of the information to be sent to help is called spread spectrum)

基于matlab7.0仿真编程 - 巴特沃茲低通及高通滤波器- Butterworth s Low-pass Filter(matlab7.0 based simulation programming-Batewoci low-pass and high-pass filter-Butterw orth's Low-pass Filter)

APF的仿真，ipiq检测，希望能帮到大家，相互交流一下心得(APF simulation, ipiq detection, hope to help you, exchange ideas)

本源码将横向自适应滤波器和格型自适应滤波器的LMS算法综合在一起,对起权系数跟踪性能可以做较好的比较(The source transverse adaptive filter and adaptive lattice filter LMS algorithm combined starting weight coefficient tracking performance can do a better comparison)

Image to0ls contains image function for matlab

一种新的快速esprit_DOA算法估计来波方向(a new fast algorithm esprit_DOA estimated to wave direction)

svd水印算法,运用svd分解来嵌入水印，抗噪性和鲁棒性都很好(svd watermarking algorithm)

Genetic Algorithm MATLAB Code for Unconstrained Optimization Problem

说明：  利用分布傅里叶方法进行数值仿真，包含损耗、色散、SPM效应。 可以观察脉冲展宽与压缩，光孤子演化。(The distributed Fourier method is used for numerical simulation, including loss, dispersion and SPM effect. We can observe the pulse broadening and compression, and the evolution of optical solitons.)

很好的DTW源代码，层次分明，注释详尽，很容易看懂，直接运行主程序main_speech_alignment_DTW.m 即可通过图观察DTW处理前后的波形。(DTW good source code, structured, detailed notes, it is easy to understand, can be run directly by the main program main_speech_alignment_DTW.m Figure waveform observed before and after DTW.)