utilities

Matlab code for UWB communication

pattern recognition system

粒子群算法（PSO）解决旅行商问题（TSP）的matlab程序。(Particle swarm optimization (PSO) to solve the traveling salesman problem (TSP) in the matlab program.)

测试不同多项式方法由卫星位置内插速度的精度。(Test different polynomial method by the accuracy of the satellite position interpolation speed.)

适合MATALAB的初学者使用。简单易懂，有实力支持 。(MATALAB suitable for the beginner to use. Easy-to-read, have the strength to support.)

说明：  e7力线通信中的部分关键技术研究，拿来分享下 (e7 power line communications in some of the key technical studies, brought to share the next)

主要内容(signal_analyzer.rar)如下： test1.txt 第一列为时间t，0.001s为步长；第二列为系统的输入信号；第三列为系统的输出信号。 signal_analyzer.m首先将test1.txt 的数据读入workspace，然后进行FFT，分析出两信号的频率，输出对于输入的幅值衰减（db），输出对输入的相位差。 (Main Content (signal_analyzer.rar) as follows: test1.txt the first time as t, 0.001s for the step the second as the input signal the third as the system output signal. signal_analyzer.m first test1.txt the data read into the workspace, and then FFT, the frequency of the two signals, the output amplitude for input attenuation (db), the output of the input phase difference.)

关于海洋地震勘探随机噪声比较详细论述的文章，写的挺好的，有兴趣的同学可以下载。(Random noise on marine seismic exploration a more detailed discussion of the article, written by very good, interested students can download.)

说明：  主动频率偏移法的改进,可以作为参考，只是需要一定的文献才能看懂(this s a typical method to solve the problem about the isolated land)

离散余弦变换(DCT)具有优于傅里叶变换、哈尔变换等正交变换的高度解相关性(apfft fir filter design)