ex_04_10_1

lab3 : Spatial Filtering

说明：  OFDM时域定时测试，分别在高斯白噪声信道和瑞利信道中(OFDM time-domain time test, respectively white Gaussian noise channel and Rayleigh channel)

matlab的聚类，此文件主要是在电信套餐生成时使用(matlab clustering, document generation telecommunications packages)

本程序为产生多途信号，并对多个信号进行叠加，并混入一定信噪比的噪声。然后对得到的信号进行频谱分析和相关分析。(The procedure for producing multi-path signal, and the superposition of multiple signals, and mixed with a certain signal to noise ratio of the noise. Then the resulting signal spectrum analysis and correlation analysis.)

由于Kmeans聚类分析是一个局部的搜索过程，因此加入遗传算法进行全局搜索选择最优的初始中心点使得Kmeans算法产生较大的改进(Since Kmeans Cluster analysis is a local search process, so join a global search for the genetic algorithm to the optimal initial centers such Kmeans algorithm produces greater improvement)

wimax programmes (ieee 802.16a)

LMS 算法的MATLAB实现 (LMS)

基于无源时差定位系统的机动目标跟踪IMM算法 (Passive TDOA location system based on the IMM algorithm for maneuvering target tracking)

使用低通滤波器从含有噪声的信号中提取有用的正弦波 (见实验指导书 实验九 数字滤波器中的第一题) 目的：用数字滤波器从含有高频噪声的采样数据中提取正弦信号。 要求：①输入信号为一正弦波，并加入一个白噪声的干扰来模拟信号传输中的随机干扰信号（用以模拟含有噪声采样序列）。 （模拟含有噪声采样序列具体可用正弦波信号叠加高频噪声来实现，为了使滤波效果明显，本实验的高频噪声是用高频均匀分布白噪声（Uniform）通过Butterworth高通滤波器过滤生成的，高通滤波器的截止频率设为10倍输入信号频率。） ②在程序中设计一个低通巴特沃斯滤波器，以滤除信号中的噪声分量，提取输入的正弦波信号 。 ③可调节信号滤波器的截止频率和阶数，可显示滤波前与滤波后的时域信号。 ④给出滤波前与滤波后的频谱特性的显示。 (Using low pass filter extracting useful sine wave signal containing noise(see experiment instruction digital filter in the first nine questions)Objective: to use digital filter sampling data extract containing high frequency noise sine signal.Requirements: (1) the input signal is a sine wave, and add a white noise interference to simulate the random disturbance signal of the signal transmission (to simulate contains noise sampling sequence).(simulated the sampling sequence contains noise available sine wave signal superposition of high frequency noise, in order to make the filtering effect is obvious, the experiment of high frequency noise is Uniform distribution with high frequency white noise (Uniform) by Butterworth high-pass filter to filter generated, high-pass filter cutoff frequency set to 10 times the size of the input signal frequency.)(2) in the program design a low-pass butterworth filter, in order to filter out the noise in the signal component, extract the input sine wav)

产生一个3载波的wcdma信号源，用于做仿真时的输入信号，现在通信系统常用的信号(generate wcdma source)