gen_ldpc

用随机的方法逼近函数的matlab源程序(Approximation method with random function matlab source)

产生不同频率、不同幅度的两种正弦波信号 对两个信号进行叠加并做频谱分析 还原原来两个信号（LPF)(Produce different frequency, the two sine wave signals of different magnitudes of the two signals are superimposed and do spectral analysis to restore the original two signals (LPF))

说明：  录制一段个人的语音信号，并对录制的信号进行采样；画出采样后语音信号的时域波形和频谱图；给定滤波器的性能指标，采用双线性变换法和窗函数法设计滤波器，并画出滤波器的频率响应；然后用自己设计的滤波器对采集的信号进行滤波，画出滤波后信号的时域波形和频谱，并对滤波前后的信号进行对比，分析信号的变化；回放语音信号；最后，设计一个信号处理系统界面。(Record a personal voice signal, and recording the signal is sampled draw sampled speech signal time-domain waveform and frequency spectrum for a given filter performance, the bilinear transformation and design of filter window functions and draw the frequency response filter then filter of their own design collection of the signal filtering, to draw the filtered signal in time domain waveforms and frequency spectrum, and filtering the signal before and after comparison, analysis of signal changes playback audio signals Finally, a signal processing system interface design.)

这是VAD有关代码。也就是说为了在音声中找到activity voice 用GAET方法来决定阈值，然后判别了无音区间。(voice activity detection)

利用FDTD软件计算纳米材料的吸收、散射(we use FDTD methord to simulate the absorption and scattedring cross section)

matlab codes for orthogonal frequency division multiplexing

削头皮EA-V1.66.rar,MT4稳定获利的一年百分之50(Cut scalp EA-V1.66.rar, MT4 stable profit of a year fifty percent)

功能：该程序主要用于计算星体运行的部分轨道参数。(Function: The procedure used to calculate the running part of the orbital parameters of stars.)

Spatial filtering foe digital image processin

说明：  维纳滤波matlab程序维纳滤波matlab程序(Wiener Filter Wiener filter matlab program matlab program)