MIDPOINTFILTER

This matlab code calculates a bit error rate of OFDM system over a flequency-selective Rayleigh fading channel.

说明：  matlab实现的语音分析，其中，有lpc分析。程序都经过软件验证，没有错误。(matlab implementation of speech analysis, of which there lpc analysis. Software programs have been validated without error.)

　MATLAB 聚类和近邻搜索模块代码如下(MATLAB clustering and nearest neighbor search module code is as follows)

编写的此函数是根据用户输入的数据产生等概率 的0、1序列，可以产生常用线路码型，也可以进行调制过程中的串并变换(this function is built to generate a sequence namely 0 or 1 with the same possibility)

实现了PCM编码->基带码型转换（NRZ to HDB3）->QPSK调制->高斯信道->QPSK解调->基带码型反转换（HDB3 to NRZ）->PCM解码。同时给出了误码率曲线。(Achieve a PCM coding-> Baseband code converter (NRZ to HDB3)-> QPSK Modulation-> Gaussian channel-> QPSK demodulator-> anti-baseband conversion pattern (HDB3 to NRZ)-> PCM decoding. Also shows the BER curves.)

基于MATLAB-SIMULINK的异步电机电机转速双闭环调速系统(Based on MATLAB-SIMULINK of Induction Motor motor speed dual-loop speed control system)

常用matlab指令列表，方便初学者学习或者查询。(Matlab command list of commonly used to facilitate learning for beginners or inquiries.)

OFDM系统高斯白噪声信道下应用LS,MMSE方法信道估计的SER仿真(OFDM system under Gaussian white noise channel application of LS, MMSE channel estimation methods Simulation SER)

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当M=4时，编写QAM的蒙特卡罗仿真程序，绘出误符号率和误码率曲线，并和理论曲线比较。(When M = 4, the preparation of QAM of the Monte Carlo simulation program, draw the symbol error rate and bit error rate curve, and and the theoretical curves.)