ipexhistology

直接序列扩频和跳频扩频直接序列扩频和跳频扩频(直接序列扩频和跳频扩频)

This M Code simulate the effects of clipping and filtering on PAPR PAPR reduction in OFDM-based wireless standard.Also the performance of BER versus SNR of original OFDM signals with PAPR reduction based on clipping and filtering schemes over AWGN channel is evaluated. The simplest and most widely used technique of PAPR reduction is to basically clip the part of signals that are outside the allowed region.Clipping methode introduces both in band distortion and out of band radiation into OFDM signals which degrades the performance including the BER and spectral efficiency.Filtering can reduce out of band radiation after clipping although it can not reduce in-band radiation distortion.However, clipping may cause some peak regrowth so that the signal after clipping and filtering will exceed the clipping level at some point.To reduce peak regrowth a repeated filtering and clipping operation can be used to obtain a desirable PAPR at a cost of computational complexity increase.

部分神经元的连线图,画图程序drawing 画神经元连线(draw neurons connection)

说明：  电子书：<神经网络理论与MATLAB7实现>,书中的所有例题的MATLAB源程序代码.MATLAB神经网络工具箱应用,解决实际问题实例,非常好!(EBook: &lt Neural Network Theory and MATLAB7 achieve&gt , the book' s source code for all examples in MATLAB. MATLAB neural network toolbox of applications, examples of solving practical problems, very good!)

Resource Allocation for OFDM Broadcast Channels Allowing User-Wise Coding

说明：  波音747的六自由度十二个变量数学模型的simulink仿真程序(747 12 variables of six degrees of freedom mathematical model of the simulink simulation program)

说明：  matlab教程电子书，很详细，适合初学者使用(matlab tutorial books, in great detail, suitable for beginners to use)

移动最小二乘法求曲面谷脊线，并立体呈现 参考文献：Sparse Low-degree Implicit Surfaces with Applications to High Quality Rendering, Feature Extraction, and Smoothing(To obtain the valley ridge moving least square method, and three-dimensional rendering)

Debye级数展开模型，计算均匀球形粒子散射角——散射光强曲线： 1. RB1.m 计算第一类Ricatti-Bessel函数的函数 2．RB2.m 计算第二类Ricatti-Bessel函数的函数 3. Alegendr.m 计算角函数 和 的函数 4. MieCoeff.m 计算米尔系数的函数 5. Amp.m 计算散射光复振幅的函数 6. DebyeIntensity.m Debye级数展开模型画均匀球形粒子散射角-光强图 (Debye series expansion model to calculate the uniform spherical particles scattering angle- scattering intensity curve: 1. RB1.m calculated first class Ricatti-Bessel function of the function 2. RB2.m calculate the second category Ricatti-Bessel function of the function 3. Alegendr.m computing angle functions and function 4. MieCoeff.m Mill coefficient calculation function 5. Amp.m calculate the scattering amplitude recovery function 6. DebyeIntensity.m Debye series expansion model painted uniform spherical particles scattering angle- light intensity diagram)

ROOT-MUSIC算法，在MUSIC上进行改进，能够提高分辨力，较好的测出信号的信息(ROOT-MUSIC algorithm, can increase the resolution of information)