MultilayerEnhance

直接序列扩频代码，完成直接序列扩频的扩展功能(Direct sequence spread spectrum code to complete the extended functionality of direct sequence spread spectrum)

说明：  MATLAB 粒子群单目标优化程序，简单易懂！(Particle swarm optimization of single objective optimization program, easy to understand! )

无约束多维极值问题,适合数学计算,优化分析等极值问题的求解(Unconstrained multi-dimensional extremum problem, is suitable for mathematical calculations, the extremum problems of solving optimization analysis, etc )

用matlab编写程序实现最优控制中的单纯形法。(Matlab programming with optimal control of the simplex method.)

it gives some compresson tools in wireless communication engineering.

利用方波调制和调制，可以设置不同的占空比以及幅值(Using a square wave modulation and modulation, can set different duty cycles and the amplitude)

sar成像matlab程序，针对目标电磁特性成像，效果较好(sar image matlab)

Forecast result example

matlab中实现三维空间中一点绕一条直线旋转的程序，输入一点，一条直线和一个角度，输出旋转后的点。(Three-dimensional space, matlab point in a straight line rotating around the program, enter the point, a straight line and a point of view, the output after the point of rotation.)

设计一个四用户的扩频通信系统，扩频增益为N=16，采用Walsh码进行直接序列扩频，BPSK调制，无线信道为AWGN信道。在接收端进行解扩，解调，判决，通过仿真得到其中一个用户的误比特率与信噪比的仿真结果。(Designed a four-user spread spectrum communication system, spreading gain for N = 16, using Walsh code Direct Sequence Spread Spectrum, BPSK modulation, AWGN channel for the wireless channel. At the receiving end for despreading, demodulation, judgments, through the simulation to be one of a user' s bit error rate and SNR of the simulation results.)