powerspectrumdensity

This matlab program compares the results of different window design methods for finite impulse response filters (FIRs): the rectangular window, Blackman window, Bartlett window, Hamming window and the Hanning window.

深入浅出MATLAB 7.X溷合编程 董维国 编着.pdf和适合初学者(MATLAB 7.X blends as easily comprehensible programming Dong Weiguo ed. Pdf and suitable for beginners)

该程序完成Matlab对音频信号的带通处理，可以将带通前后的频谱图相对比，和播放音乐变化。(The program completed Matlab band-pass processing of the audio signal, may be band-pass around the spectrum diagram relative ratio, and playback music changes.)

说明：  OFDM是将高速串行数据分成成百上千路并行数据,并分别对不同的载频进行调制,这种并行传输体制大大扩展了符号的脉冲宽度,提高了抗多径衰落的性能。同时,在传统的频分复用方法中,各子载波之间的频谱互不重叠,频谱利用率较低。而采用OFDM技术,一个OFDM符号之内包括多个经过调制的子载波的合成信号,每个子载波在频谱上相互重叠,这些频谱在整个符号周期内满足正交性,因而在接受端可以保证无失真恢复,从而大大提高频谱利用率。(OFDM divides high-speed serial data into hundreds of parallel data channels and modulates different carrier frequency separately. This parallel transmission system greatly expands the pulse width of symbols and improves the performance of anti-multipath fading. At the same time, in the traditional method of Frequency Division multiplexing, the spectrum between the sub-carriers does not overlap each other, the spectrum utilization ratio is low. In the case of OFDM, an OFDM symbol consists of multiple modulated sub-carriers, each of which overlaps in the spectrum, which is orthogonal throughout the symbol period, thus, no distortion recovery can be ensured at the receiving end, thus greatly improving the spectrum utilization ratio.)

这个程序实现了ofdm下的注水原理，是一个基于速率的注水程序，并不是传统的基于功率的注水原理。(This program realise a program based on waterfilling method which is concerning the rate adaptation not the power adaptation.)

应用matlab实现梅尔倒谱系数的提取，通过采用不同样本进行数据对比(Application matlab realize extract Mel cepstral pedigree data by comparing different samples)

基于3GPP标准的信道编码turbo码的simulink仿真文件。(Simulink simulation files based on the 3GPP standard channel coding turbo codes.)

Performance of multiuser CDMA

说明：  产生高斯混合倾斜噪声，用于目标跟踪领域，matlab代码需要解压后使用(Gaussian mixture skew noise is generated for target tracking)

说明：  Copula函数，以及相关性计算和相应的散点图(Copula compute)