lecture4a

高斯噪声随机变量发生器，这些随机变量有一个零均值，方差D。(Gaussian random variable generator，These random variables have a zero mean and variance D.)

Adding Noise and the Restoring

使用matlab程序实现最小二乘法的基本原理和多项式拟合算法程序(the code for least square with matlab)

特征选择方法，用于降低数据维数，常见的一种特征筛选手段，可以从大量变量中筛选特征变量实现保留变量与目标之间的最大相关性(feature selection method for mRMR)

自己编的计算盒维数的matlab源代码。将文本文件导到matlab中运行。(Own calculation of box dimension of the matlab source code. Introduction to the text file to run matlab.)

hht轉換,Hilbert-Huang (HHT) 轉換方法是黃鍔根據近代知名數. 學家Hilbert 的數學理論設計(hht transform)

lear N = 10^5 EB_NO = [-1:30] liu1 = zeros(1,N) liu2 = zeros(1,N) for ii = 1:length(EB_NO) m= (2*(rand(1,N)>0.5)-1) + j*(2*(rand(1,N)>0.5)-1) s = (1/sqrt(2))*m normalization of energy to 1 n = 1/sqrt(2)*[randn(1,N) + j*randn(1,N)]

人脸识别领域的K-L变换（Eigenface）的matlab源码(KL transform the field of face recognition (Eigenface) of matlab source)

the MATLAB codes for the well-known modulation techniques.

本论文首先介绍了当前深空通信的编码调制技术的现状与发展，阐述了以往 的深空通信中的编码和调制技术的方案和局限性，提出LDPC码和FQPSK调制的 优越性和发展前景。第二章描绘了LDPC码的奇偶校验矩阵的图形表示、生成方 式和译码方法，并比较二元LDPC码和多元LDPC码的优越性和实现问题。第三 章在介绍FQPSK调制的方案的由来、改进和发展的基础上，对其进行了功率谱分 析，介绍了一些常规的解调方案。(This paper introduces the current situation and development of the technology of deep-space communication code modulation on the coding and modulation techniques in deep space communications program and limitations of the proposed of LDPC codes FQPSK modulation superiority and development prospects. Chapter II depicts a graphical representation of the LDPC code of the parity check matrix generation method and decoding method, and compare the superiority of binary LDPC codes and multiple LDPC code and implementation problems. Chapter origin in the introduction FQPSK modulation program, improvement and development on the basis of its power spectrum analysis, conventional demodulation.)