DCMotor_nominal

说明：  遗传算法解决背包问题，其中包括算法编码初始化，交叉，变异和惩罚策略，很好的解决了背包问题(Genetic algorithm to solve knapsack problem, including the coding algorithm initialization, crossover, mutation and punishment strategy, a good solution to the knapsack problem)

说明：  qpsk调制在awgn/rayleigh信道下的误码性能比较，以及信号的功率谱和星座图(QPSK modulation in awgn/Rayleigh Channel Performance Comparison of error, and the signal power spectrum and constellation)

本程序仿真了信号与系统中的频谱混叠，频谱泄漏和栅栏现象，包含三个文件：pinpufenxi.m, pinpufenxi.fig和一份word简介文档。(the process of signal simulation system with a spectrum-aliasing, spectrum leakage and fencing, contains three documents : pinpufenxi.m, pinpufenxi.fig and a brief word document.)

利用stft实现了跳频信号的跳周期估计 简单的进行了跳频信号的仿真，然后利用短时傅里叶变换对跳频信号进行分析，再对得到的时频矩阵提取时间平面，对时间序列去直流，进行傅里叶变换，最后实现得到跳周期。(estimates the hopping time of the sfh by stft )

软开关在开关电源中的重要地位不言而喻，此代码实现了电源的软开关控制(Soft switching in the switching power supply in an important position is self-evident, this code implements the soft-switching power supply control)

a fast and precise algoritm to find local maximum or minimum

这是一个进行卫星轨道程序，二体问题卫星的瞬时轨道根数的输入及预报的输出(Two-body problem)

一个简单的m序列产生函数，通过调用primpoly获得本原多项式，然后通过移位循环寄存器产生所需要的序列。自相关图形上能看到峰值旁瓣电平(PSL)和积累旁瓣电平(ISL)。(A simple code for generate m-series pseudo-random sequence based PRIMPOLY function which we get the prime polynomials first,then we get the feedback connect coefficient of the cycle shift registers which generate m-series sequency. the PSL and ISL of autocorrelate function is computed on the figure. )

说明：  距离波门拖引干扰模型，拖引过程实时显示，以GIF图片保存(Distance gate towing interference model, real-time display of towing process, saving with GIF picture)

matlab下的adaptfilt，用于自适应滤波器，滤波信号堪比输入无噪音信号(matlab under adaptfilt, for the adaptive filter, filtering the signal comparable to the input signal without noise)