utilities

A wireless channel implemenatation in MATLAB

语音编码，g7.22协议程序很难找的。希望能给使用的人予以帮助 (Speech Coding, g7.22 agreement procedure of hard to find. Hope that they will be used to help people)

说明：  基于核的FCM，可以用于聚类或者图像分割，但运行速度不是很快 自己不知道如何优化(Kernel-based FCM, can be used for clustering or image segmentation, but the speed is not fast they do not know how to optimize)

Matlab的SVC程序文件！可以运行！(The SVC Matlab program files! Run!)

identification for strong apperiodical processes.

代码实现了汉明码译码的软判决和硬判决误码率仿真图，并且通过对比理论曲线，验证了代码的正确性。(This code achieves the BER code curve of hamming code using soft decision and hard decision. Compared with the theoretical curve,I verify the correctness of the code.)

GNSS/INS组合导航的定位算法，18维状态空间，仿真验证程序。(GNSS/INS integrated navigation positioning algorithm, 18 dimensional state space, simulation verification program.)

DistMesh giving a singular FEM matrix?(Hi Anyone here with some experience of using DistMesh in finite element code? I m solving the scalar Helmoltz equation in an annular region in 2D: rho_1 < rho < rho_2 where rho_1 is the radius of a Perfect Electric Conducting cylinder and rho_2 is where the mesh is truncated using an Absorbing Boundary condition. Now, I ve written code to mesh the region myself (by dividing the region into annular rings and picking a fixed number of points on each ring) and I ve written another program which uses DistMesh to mesh the region. I get a nice solution using my own meshing code but the FEM matrix becomes singular when I use DistMesh. This is the DistMesh Code I used: Circle with hole rABC=1.5 rCyl=0.5 fdstring=sprintf( ddiff(dcircle(p,0,0, f),dcircle(p,0,0, f)) ,rABC,rCyl) fd=inline(fdstring, p ) box=[-2,-2 2,2] [p,N]=distmesh2d(fd,@huniform,0.04,box,[]) I tried changing box and the 0.04 value (initial edge length). But every time, the matrix becomes sin)

Digital filters and oscillators

本源程序是用MALAB编写，并且主要是从图像处理方面研究的(The source code is written using MALAB, and mainly from the study of image processing)