chap2_1

OFDM传输系统的matlab仿真及相关源程序(OFDM transmission system simulation and related source code matlab)

由于多径和移动台运动等影响因素，使得移动信道对传输信号在时间、频率和角度上造成了色散，如时间色散、频率色散、角度色散等等，因此多径信道的特性对通信质量有着至关重要的影响，而多径信道的包络统计特性成为我们研究的焦点。根据不同无线环境，接收信号包络一般服从几种典型分布，如瑞利分布、莱斯分布和Nakagami-m分布。(Because multipath and mobile and other sports influence factor, makes mobile channel in transmission in time and frequency signal and Angle caused the dispersion, such as time dispersion, frequency dispersion, Angle dispersion, and so on, thus multipath channel of communication with the characteristics of quality is very important, while the effect of multipath channel (the statistical properties become the focus of our research. According to different wireless environment, receiving signals envelope general subject to several typical distribution, such as Rayleigh distribution, rice distribution and Nakagami-m distribution. )

一篇文章，介绍如何在MATLAB/SIMULINK中实现可视化动画仿真，实用性很强(An article describes how MATLAB/SIMULINK simulation to achieve visual animation, very practical)

图像边缘检测LoG，DoG方法实现，还有图像的低通滤波(LoG and DoG for image edge detection, including lowpass filter)

子带编码程序，使用Daubechies（5,3) filter bank，自带降采样及升采样子程序(The subband coding procedures, using Daubechies (5,3) filter bank comes downsampling and upsampling subroutine)

本文主要讨论在MATLAB软件中如何实现C程序源代码的移植。结合"道路平整度指数(IRI)预测问题"的实例,将C语言编写自仿射变换分形插值函数,移植(或改写)到MATLAB中,绘制出宁波机场道路平整度的预测图象,为解决预测问题可视化提供帮助。(This paper mainly discusses the MATLAB software, how to achieve C source code of the transplant. Conjunction with the road roughness index (IRI) a projection of the example of C language to self-affine fractal interpolation function transformation, transplantation (or rewritten) to MATLAB, the mapping out of Ningbo airport road roughness prediction image, To address the issue of visual projections to help.)

源代码 用程序得到本机的MAC 地址 工程要经常用到(The source code with the procedures are the MAC address of the machine)

KMV方法计算企业资产和资产波动率 参数说明： E:股权市值 D:负债总额 r：无风险利率 T:企业债期限 EquityTheta：股价波动率

说明：  辨识参数，进行迭代计算，可以辨识各种经典模型的是参数，经典最小二乘法a(Parameter identification, iterative calculation, can identify all kinds of classical models is the parameter, classical least square method a)

说明：  Rilling的关于Rilling的关于HHT端点延拓的代码HHT端点延拓的代码(Rilling Rilling on HHT endpoint extension on the code the code HHT endpoint extension)