quasi_qpsk_paper_t4r2

For simulation of communication system using matlab

说明：  通信系统仿真与分析中经常用到的高斯白噪声的产生方法(Communication System Simulation and Analysis in the frequently used Gaussian white noise, the method of)

lda基本思想是选择使得Fisher准则函数达到极值的向量作为最佳投影方向，从而使得样本在该方向上投影后，达到最大的类间离散度和最小的类内离散度(Linear classification algorithm)

余割函数方向图的天线设计，其中给出了设计原理和实物图。(Cosecant pattern of the antenna design, which gives the design principle and the physical map.)

说明：   基于matlab 的叠加高斯白噪声的正弦信号频谱分析，给定正弦函数x=sin(2πf0n/N+π/3)+sin(2πf1n/N+π/4)，设定f0.f1的值，加了噪声之后做快速傅里叶变换，在matlab中分析其频谱，验证是否与f0,f1的值符合。再变换N值，看随着N值的变化对应点是否符合及有何变化。(Matlab based on the superposition of Gaussian white noise sinusoidal signal spectrum analysis, given the sine function x = sin (2蟺f0n/N+蟺/3)+sin (2蟺f1n/N+蟺/4) set value of f0.f1, do a quick noise Fourier transform to analyze the spectrum in matlab, verify that with f0, in line with the value of F1. Transform the value of N, see change as the value of N corresponding points of compliance and what changes.)

This file is used to generate wireless microphone signal. These models of wireless microphone signal are useful in an evaluating the performance of spectrum sensing scheme.

该程序给出了一个4*4_MIMO的实现，包含802.11n信道模型和AWGN信道模型，同时给出了在此模型下的时频估计计算，最后得到信噪比与误码率之间的关系曲线图。(The program gives a 4* 4_MIMO of implementation, including 802.11n channel models and AWGN channel model, while at the same time gives this model the frequency estimation is calculated, and finally get to noise ratio and bit error rate curve between Figure.)

ofdm tutorial in a simple manner using matlab

说明：  毕业用的时间序列混沌分析，里面吧包含相空间重构，李雅普诺夫指数求取，小波去噪等等(Graduated with a chaotic time series analysis, which it contains the phase space reconstruction, Lyapunov exponent for wavelet denoising, etc.)

在matlab中调用libsvm的时候数据归一与反归一 在matlab中调用libsvm的时候数据归一与反归一(in Matlab call libsvm time data normalization and anti-normalization in Matlab emphasized libsvm used when a data normalization and anti-normalization)