reduction

QPSK调制以及误码率计算程序，含分析报告，对于通信专业的人士有一定帮助(QPSK modulation and the bit error rate calculation procedures, including analytical reports, for the communications professional to help people have a certain)

短时傅里叶变换可以用差分模式来实现，对书上的运算式做了稍许的改变。改变-计算差分序列的第一列数据时用的是第一列的元素减去当前行的最后一列元素。原算法中采用的是第一列元素减去下一行第二列元素。原算法加窗之后结果比较好，不加窗时结果误差很大，而改变之后的算法不加窗效果依然很好。(Short time Fourier transform can be used to achieve the differential mode of expression on the book made a slight change. Change- calculating the difference sequence of the data with the first column is the first column of the matrix by subtracting the current element in the last column of row. Is used in the original algorithm subtracts the elements of the first column of the next row and the second column elements. After the results of the original algorithm windowed better, when the results window without great error, and after changing algorithms no window effect is still very good.)

在OFDM系统下，采用LS、MMSE、DCT、lrmmse等方法进行信道估计(channal estimate)

Matlab仿真程序，介绍了数据的程序结构、运用和算法设计。(Matlab simulation program, introduced procedures for data structure, application and algorithm design.)

matlab去除信号直流分量代码，可用来处理GPR数据(DC component of the signal is removed matlab code used to process the data GPR)

说明：  在matlab中实现巴特沃斯低通滤波器as=70 Fs=15000 Fp=9000 (butterworth lowpass filter as=70 Fs=15000 Fp=9000 )

构建的异步电动机MATLAB本体仿真模型(Asynchronous motor body building MATLAB simulation model)

一个很实用的有关于高阶谱的matlab的源程序，下载可直接使用(A very practical about theHigher-Order Spectral Analysis matlab source code, downloads can be used directly)

射影几何的经典书籍，是学习摄像机标定和自标定必须掌握的理论基础(Projective geometry of the classic book, is to learn camera calibration and self-calibration must master the theoretical basis)

说明：  龙格库塔程序源代码，用于解微分方程或微分方程组，给初学者作为参考。(Runge-Kutta program source code for the solution of differential equations or differential equations, as a reference for beginners.)