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ofdm 4 QAM调制，整个ofdm系统(ofdm)

this mfile is a code for simulation rice fading channels versus snr.

A Guide to MATLAB Object Oriented Programming

对leach协议的改进，改变产生簇头的方式，距离bs越近，成为簇头的概率就越大。(Improvement on the leach protocol to change the way the cluster head generated from the bs the more recent, as the greater the probability of cluster head.)

四边简支，受两个集中荷载的薄板弯矩及挠度分析程序，利用的弹性力学薄板理论。(Simply supported by two thin plate bending and concentrated load deflection analysis procedures, the use of thin elastic mechanics theory.)

Matlab2010经典超强教程(清晰版)，适合初学者的一本教材。 (atlab2010 super classic tutorial (clear), a textbook for beginners. )

this code performs the building matrix and coding message and outputs the coded message

群智能算法中的差分算法，好用有效，含有测试函数和换图函数(differential algorithm)

双极性二进制基带传输系统的仿真和误码性能验证 ①．发送信号的星座图，发送和接收信号的波形，不同信噪比情况下，接收信号的星座图 ②．画出无信道编码时，误比特率的理论曲线和仿真曲线，以及有信道编码时误比特率的仿真曲线 ③．解释以上获得的各种结果的合理性 ④．选做：选用不同纠错能力的信道编码方法，比较信道译码后的误码率(Simulation and Error Performance Verification of Bipolar Binary Baseband Transmission System (1) Constellation diagram of transmitted signal, waveform of transmitted and received signal, constellation diagram of received signal under different signal-to-noise ratio (2) Draw the theoretical and simulation curves of BER without channel coding and the simulation curves of BER with channel coding. (3) Explain the rationality of the results obtained above. (4) Choose: Choose channel coding methods with different error-correcting abilities to compare the bit error rate after channel decoding.)

说明：  经典的topsis方法，两个例子，实测能跑的通，有详细说明(The classic TOPSIS method, two examples, can run through the actual measurement, there is a detailed description)