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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.)

最优化问题的快速下降法，共轭梯度法，基于matlab算法。经过测试好用(Optimization problem of the rapid descent method, conjugate gradient method, based on matlab algorithm. Tested, easy to use)

利用CIC滤波器实现中频脉冲信号的包络检波(use CIC filters IF signal pulse envelope detector)

用Matlab从Excel中导入数据，含虚拟数据和各种导入格式(Import data from Excel into Matlab)

说明：  实指数序列a=1/2 实指数序列a=1/2(Real exponential sequence a = 1/2)

说明：  使用各种牛顿法（包括普通牛顿法，拟牛顿法，阻尼牛顿法）求解优化问题(Using various Newton methods (including general Newton method, quasi Newton method, damped Newton method) to solve optimization problems)

C语言实现的主程序分析法PCA，实现降维处理(C language implementation of the main analysis PCA, achieve dimensionality reduction)

Aiming at determining the satellite attitude precisely，the gyros bias and m isa lignment were compensated in time by using the quaternion of star-sensor and extended Kalm an filter．The related module of the filter was derived．The theoretic accuracy of the algorithm was acquired from the numerical simulation． The effects of the star-senso r misalignment on attitude determination were analyzed at last．

双闭环直流电动机，可以实现PID自动控制(Double closed loop DC motor, PID automatic control)

对单幅图像进行编解码程序，经过DCT,量化，扫描，编码及其逆过程实现编解码(Single image codec on the program, after DCT, quantization, scanning, coding and decoding achieve reverse process)