Laplace

已知一个序列x(n)=0.5cos(0.55*pi*n)+cos(0.45*pi*n),时域FFT分析其频谱。 （1）使用不同宽度的矩形窗截断该序列为M点，取M分别为：20，40，160,观察不同长度对频谱影响；（2）使用哈明窗和凯泽窗重做；（3）对三种窗的结果进行分析比较；（4）总结窗类型和长度对频谱分析的影响。 (Known a sequence x (n) = 0.5cos (0.55* pi* n)+ Cos (0.45* pi* n), time-domain FFT analysis of its spectrum. (1) use a different width of the rectangular window of the sequence for M cut-off point, take M are as follows: 20,40,160, observing the impact of different lengths of the spectrum (2) the use of Hamming window and the Kaiser window redo (3 ) on the three windows analyzed and compared the results (4) summarize the type and length of window for spectrum analysis.)

应用psk调制解调技术和正交频分复用技术进行通信系统的仿真(Application psk modulation and demodulation technology and orthogonal frequency division multiplexing communication system simulation)

数学建模中常见的灰度预测程序，能够求解一般的预测性问题，较实用(Mathematical Modeling in the common gray forecasting process, to solve the general problem of predictability, a more practical)

说明：  实现STTC编码 利用Simlink平台搭建信道模型(STTC coding to achieve Platform built using Simlink channel model)

BASICS FOR MATLAB SIMULINK

this is simple qpsk for matlab code

最小二乘一次计算法,就是一般的最小二乘算法(Least squares method, that is, the general least squares algorithm)

matlab6.5参考手册，是英文版的。里面含有simulink的参考手册。(matlab6.5 Reference Manual is in English. Simulink which contains a reference manual.)

Star plots - MATLAB files for Graphical Representation of trace elements of clinkers(- MATLAB files for Graphical Rep. resentation of trace elements of clinkers)

基于最小二乘法的可变分数延时FIR滤波器设计(Delay FIR filter design based on a variable fraction of the least squares method)