liziqunsuanfa-matlab

当信噪比低，小信号输入时噪音严重，在整个音域的声音明显变得浑浊不清，不知发的是什么音，严重影响音质。信噪比的大小是用有用信号功率（或电压）和噪声功率（或电压）比值的对数来表示的。(When the signal to noise ratio is low, serious small signal input noise, the sound of the entire range becomes significantly turbid, I do not know what made the sound, seriously affecting the sound quality. Size is the number of the signal to noise ratio by the ratio of desired signal power (or voltage) and the noise power (or voltage) represented.)

基8-DFT计算，每8点为一蝶形运算单元，4096点计算效率较基2-DFT提高50 (Yl 8-DFT calculation, every 8 points for a butterfly operation unit, the 4096-point computation efficiency than the base 2-DFT increased by 50 )

PSO算法两个目标的代码，测试程序是非线性方程组，目标变量为找到MinF（x)(PSO algorithm code two goals, the test program is non-linear equations, the target variable is found MinF (x))

说明：  用于海洋绘图和密度 温度盐度的计算，绘图可以调用函数(For marine mapping and calculation of density temperature and salinity)

说明：  DCT压缩感知方案，采用DCT基稀疏分解原始信号，并且重构出原始信号(DCT compressed sensing scheme, using sparse decomposition of the original DCT-based signal and reconstruct the original signal)

细胞形态学检测，matlab实现，效果不错(Detection of cell morphology, matlab achieved good results)

MatlAB与信号与系统的结合例程，实现了傅里叶函数使用，用filter，fplot等绘图。(MatlAB with a combination of signal and system routines, the use of a Fourier function, the filter, fplot and other graphics.)

说明：  介绍了通信系统中各种功能仿真的一些源代码和案例(Describes the simulation of communication systems in the various functions of some source code and case)

清音的对数幅度谱，短时过零率，平均能量，基音周期(Voiceless logarithmic amplitude spectrum, short-term zero crossing rate, average energy, pitch period)

通过matlab实现文本文档的压缩与解压缩，该程序可以完全实现功能(Through the matlab text document compression and unzip, this program can be fully realized function )