rake_simulation

frequency hopping spread spectrum

将声音文件在时间轴上分割成几段，分别将段的秩序及某些段内的秩序颠倒，从而实现了对声音文件的加密。首先，先读取一个声音信号，对信号做1024点FFT变换，取完点之后，分成四个向量，四个向量组成一个矩阵，再对每一个向量进行转置，再重新整合，从而就实现了回密的过程。(Sound files on the timeline will be divided into paragraphs, each paragraph of the order and reversed the order of some paragraphs to realize the encryption of sound files. First, the first reading of a voice signal, the signal was 1024 points FFT transform, check after the completion point, divided into four vectors, the four vectors form a matrix, then for each vector transpose, re-integration, which will achieve a return to close the process.)

Changed in hostfs_args before the kernel starts running.

1.MUSIC算法MATLAB程序 估计目标方位(MUSIC algorithm for direction estimation)

说明：  与连续信号的解调相比，短时突发信号持续时间短，不适用性能良好的反馈环路算法，需要使用前向幵环算法。与一般突发信号相比，短时突发信号没有训练序列、同步头等辅助信息，所有参数需要利用有限的数据估计。与合作通信相比，盲接收信号参数的初始偏差较大，估计范围小的算法不适用。每个突发包的数据有限，解调过程不允许丢失任何符号。(Compared with the demodulation of continuous signal, short burst signal has a shorter duration and is not suitable for the feedback loop algorithm with good performance. Forward loop algorithm is needed.)

较简单的车牌定位方法,并用matlab实现,该程序得到我老师的好评!(A simpler method of license plate location and use matlab implementation, the program received high praise from my teacher!)

求一个40阶的雷米兹带通滤波器，并绘出两个滤波器的幅频特性图(Remez seeking a 40-order band-pass filter, and plot the frequency characteristics of two filters map)

计算电磁学，E文，适用于电磁场，微波，射频等专业，简单易懂且实用，有MATLAB例子，不容错过(Computational electromagnetics, applies to electromagnetic fields, microwave, radio frequency, and other professional, easy to understand and practical, MATLAB examples, not to be missed)

说明：  粒子群优化方法，并行计算，收敛速度快，利于全局优化，算法实现简单(Particle Swarm Optimization)

说明：  经典信号小波分解matlab算法,注解很清楚，可以直接执行(classic wavelet for analysing signal)