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一个循环信号检测的matlab源码程序，基于随机共振(A loop signal detection matlab source programs, based on stochastic resonance)

Huffman、汉明编译码:首先对给定的信源序列进行概率统计，得出信源符号的概率 p，之后进行Huffman 编码，再进行信道汉明编码。(Huffman coding and decoding: firstly given source sequence probability and statistics, the probability derived source symbols p, after Huffman coding.)

matlab中，时频峰值滤波处理地震记录时的窗长讨论代码(matlab window length, the time-frequency peak filtering processing of seismic records of discussions code)

SVPWM for Induction Motor

数据库的完整性控制熟悉利用企业管理器为列创建DEFAULT约束、为列创建CHECK约束、为列创建UNIQUE约束、为列创建不允许为空约束、创建PRIMARY KEY约束、创建FOREIGN KEY约束(Integrity control of the database use Enterprise Manager to create the familiar column DEFAULT constraint, create a CHECK constraint for a column, create a UNIQUE constraint for a column, create a column does not allow null constraint, create a PRIMARY KEY constraint, create FOREIGN KEY constraint)

直接序列扩频DSSS， 跳频扩频FHSS， 码分多址CDMA编译码， 的实现(the realization of Direct Sequence Spread Spectrum DSSS, frequency hopping spread spectrum FHSS, Code Division Multiple Access CDMA codec, )

此程序为VC与matlab图像处理与识别实用案例精选的源码，内容详实，与大家分享。(This program is VC with matlab image processing and recognition of practical cases of selected source code, content, informative, and to share.)

录制自己的一段语音，时间控制在15秒到30秒左右；利用wavread函数对自己的语音进行采样，记住采样频率。 （1）画出原始语音信号的时域波形，而后以1秒为间隔，求出每秒数据的功率谱。 （2）根据语音信号特点，分别设计FIR及IIR滤波器，分别画出滤波器幅频和相频特性曲线。用设计的滤波器对信号滤波，画出滤波后时域波形。用sound函数回放语音信号。 （3）求出特征频段语音信号随时间变化的曲线（每间隔0.05秒求一次功率谱）。 (Record your own voice for some time (15 seconds to 30 seconds) use wavread function of the voice samples, remember the sampling frequency. (1) Draw the original speech signal in time domain waveform, and then to 1 second intervals, the data obtained power spectrum per second. (2) According to the voice signal characteristics, FIR and IIR filters were designed, namely to draw the amplitude and phase frequency characteristic curve. With the design of the filters on the signal filtering, to draw the filtered time-domain waveform. Playback with sound function of the speech signal. (3) Find the characteristic band speech signal curve over time (0.05 seconds intervals seeking a power spectrum.))

编写一个可以增强图像的函数，可以使得图像的灰度级转变。(Write a function that can enhance the image, you can make changes in the gray level of the image.)

用matlab实现DQPSK的调制解调，并绘制BER曲线(Using matlab to achieve DQPSK modulation and demodulation, and draw the BER curves)