DTMF

摘要:正交频分复用(OFDM)是第四代移动通信的核心技术。该文首先简要介绍了OFDM基本原理,重点研究了理想同步情 况下,保护时隙(CP)和不同的信道估计方法在高斯信道和多径瑞利衰落信道下对OFDM系统性能的影响。在给出OFDM系 统模型的基础上,用MATLAB语言实现了整个系统的计算机仿真并给出参考设计程序。最后给出在不同的信道条件下,保 护时隙、信道估计方法对OFDM系统误码率影响的比较曲线,得出了较理想的结论。 (O FDM is the key techno logy of 4G in the field of mobile comm unication.In this article O FDM ba sic p rinc ip le is briefly in troduced.Then,the influence of CP and d iffe rent channe l e stim a tion on the system pe rfo rm ance is emp ha tica lly analyzed respectively in Gauss and R ayle igh fading channe ls in the cond ition of ideal synchronization.B e sides,based on the given system mode l O FDM system is compu te r sim u la ted w ith MA TLAB language and the refe rentia l design p rocedure is given.Fina lly,the B ER cu rves of CP and channe l e stim ation a re given and comp ared.The conclusion is sa tisfac to ry. )

舰船噪声特征提取 特征提取的方法舰船噪声特征提取 特征提取的方法舰船噪声特征提取 特征提取的方法(Ship radiated noise feature extraction feature extraction methodShip radiated noise feature extraction feature extraction methodShip radiated noise feature extraction feature extraction method)

This programs describes the Gabor Filter set (4 scale and 4 orientations ) . This filter can be used for many applications ranging from compression, featuImage Pyramid that can be then used for Image compression by various coding techniques. (This describes the programs Gabor Filter's et (4 scale and four orientations). This filter can be used for many applications ranging from comp ression. featuImage Pyramid that can be then used for Ima ge compression by various coding techniques.)

validation of goal post by using FE

时域有限差分、矩量法做三维平面散射，pml边界条件，并与mur对比(Finite-difference time-domain method of moments to do three-dimensional plane scattering, pml boundary conditions, and compare with mur)

Matlab下实现rb算法(Matlab under rb Algorithm)

IDL转Matlab，可以将IDL源代码转成MATLAB，并有例子(IDL to Matlab)

Finding the Nearest Orthonormal Matrix In some appoaches to photogrammetric problems (perhaps inspired by projective geometry), an estimate M of an orthonormal matrix R representing rotation is recovered. It is then desired to find the “nearest’’ orthonormal matrix. While this two step approach — first finding a “best fit’’ matrix without enforcing orthonormality,and then finding the nearest orthonormal matrix — is not to be recommended, it may be of interest to find a solution to this problem nevertheless.

哈工大数学实验的作业 实现Matlab GUI的程序 是一个画图程序(Mathematical operations to achieve HIT experiment Matlab GUI program is a paint program)

A MATLAB code for FCM image segmentation of medical images.