第06章 语音编码

粘弹性模型三元模型umat子程序，包括abaqus用户手册中的程序例子以及编写的程序代码和对应的inp文件(Viscoelastic model trigram umat subroutines, including abaqus user manual procedures and examples of programs written in code and corresponding inp file)

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)]

Impedance Smith Chart High resolution

这个文件夹分三部分，有matlab的源程序代码100个，有助于matlab编程。(matlab example codes are very helpfun for some persons who begin to learn matlab.)

Phase-shift keying (PSK) is a modulation process whereby the input signal, a binary PCM waveform, shifts the phase of the output waveform to one of a fixed number of states. The demodulation process can be divided into three major subsections, as shown by Figure 4. First, since the incoming waveform is suppressed carrier in nature, coherent detection is required. The methods by which a phase-coherent carrier is derived from the incoming signal are termed, carrier recovery, and will be covered first.

matlab secret generator

说明：  自编的粒子群聚类的算法通过改进可以正常的进行点的筛选(Particle clusters self class of algorithms can be normal by improving the screening for point)

This is a simple, yet useful Bloch equation simulator that runs in Matlab. It is written as a MEX function so that it can run reasonably quickly, and simulate RF and a 1D gradient waveform. Simulations can be run for a range of spatial offsets and frequency offsets.

经典的隐写算法，包括LSB替换和随机LSB匹配。对于实现简单的信息隐藏最常用的方法，具体用matlab实现。(This is LSB steganography, it includes LSB replacement and random LSB matching. it is most common method for information hiding, and it implement with matlab)

通过虚拟阵元进行DOA估计，包括面积、周长、矩形度、伸长度，合成孔径雷达（SAR)目标成像仿真，matlab编写的元胞自动机，数学方法是部分子空间法。(Conducted through virtual array DOA estimation, Including the area, perimeter, rectangular, elongation, Synthetic Aperture Radar (SAR) imaging simulation target, matlab prepared cellular automata, Mathematics is part of the subspace.)