maokan

本代码是关于多天线技术空时块编码的通信系统仿真源程序，其中包括QPSK调制，QPSK解调，FFT,IFFT，STBC等模块,并给出误码率计算和性能仿真图。(The code is on the multi-antenna space-time block coding techniques of communication system simulation source code, including QPSK modulation, QPSK demodulation, FFT, IFFT, STBC and other modules, and gives the bit error rate and performance simulation map.)

说明：  一本关于matlab的书籍，对初学matlab的学者很好的指导书(A book on matlab, matlab scholars on a good beginner guide book)

局部特征提取 局部特征提取 局部特征提取 局部特征提取 局部特征提取(Local feature extraction of local feature extraction of local feature extraction of local feature extraction of local feature extraction)

说明：  主要指令：butter（产生巴特沃斯滤波器）；freqz（绘制幅频、相频曲线）；zplane（绘制零、极点图）；ss2zp（状态方程变零、极点）；zp2tf（零、极点变分式多项式）。(Main instruction: butter (produced bart wo filter) Freqz (draw amplitude frequency, phase frequency curve) Zplane (draw zero, poles chart) Ss2zp (state equation is zero, poles) Zp2tf (zero, pole change fraction polynomial). )

A QPSK simulation using simulink. very useful to understand the scheme at every level of QPSK modulation.

中南大学《数字信号课程设计》(包含很多滤波Matlab代码)(Central South University digital signal curriculum design (including a lot of filtering Matlab code))

本程序画出了时间序列下的各变量变化图，得到混沌性质，从而在区域内对变量进行取值，达到模拟出混沌的目的(This procedure draws the time series of each variable changes in plans, the chaotic nature, and thus in the region of variable values, to simulate the purpose of Chaos)

说明：   数据挖掘中的决策树C4.5算法的实现,用matlab实现(Data Mining Decision Tree Algorithm of C4.5, using Matlab to achieve)

一个简化的H.261视频编码方案，最后显示两张图压缩编码后的压缩比(a simple h.261 video coding method, and finally display the compress rate of two pictures.)

The timing_recovery_1.mdl uses Simulinks variable step solver to create a continous time QPSK signal with both carrier and symbol rate errors. This is a relativly straight forward approach, but is computationally expensive. The sescond model, timing_recovery_2Q.mdl uses a purely discrete time approach using the same fractional sample delay approach as does the receiver. This can run much faster.