IMPROVUNG

Compute log(sum(exp(x),dim)) while avoiding numerical underflow. By default dim = 1 (columns).

to check for smaller eigen value

一种新的符号定时和载波频率同步算法,该算法将OFDM符号分成几部分。它使用相关性和积累在几个OFDM 符号获得估计函数。当部分的长度小于ISI自由地区,该算法可以识别它。然后估计的最优符号定时和载波频率偏移可以获得。计算机仿真结果表明,该算法不仅可以跟踪时变信道变化但也有较小的MSE比ML估计算法。(A new symbol timing and carrier frequency synchronization algorithm is presented and the algorithm divides the OFDM symbol into several parts. It uses correlation and accumulation in several OFDM symbols to acquire estimation function. When the length of part is smaller than that of ISI free region , the algorithm can distinguish it. Then the estimation of optimal symbol timing and carrier frequency offset can be acquired .The computer simulation results show that the proposed algorithm not only can track time varying channel change but also has smaller MSE than that of ML estimation algorithm.)

Gauss_generator利用参数（多普勒频移、系数、相移）生成确定的实高斯过程.m gaussian确定离散多普勒频移、系数、相移的程序.m Rice_generator在瑞利过程的基础上考虑视距分量，生成莱斯过程.m Suzuki_generator成确定型Suzuki过程.m Rayleigh_Doppler_multiPath.m Rayleigh_Doppler_singlePath.m rayleigh_Filter_Model.m pdf_cdf_gen.m test_rayleigh_pdf.m rayleigh.m(Gauss_generator use parameters (Doppler frequency shift coefficient, phase shift) formation to determine the actual Gaussian process. m Gaussian identify discrete Doppler frequency shift coefficient, Phase-shifting procedures. m Rice_generator in Rayleigh process on the basis of weight to consider the horizon, Rice production process. m-Suzuki_generator identified as Suzuki process. m Ra yleigh_Doppler_multiPath.m Rayleigh_Doppl er_singlePath.m rayleigh_Filter_Model.m pd f_cdf_gen.m test_rayleigh_pdf.m rayleigh.m)

WIRELESS COMMUNICATIONS Professor Andrea Goldsmith(Professor Andrea Goldsmith)

calculate the air properties(input the parameters are relative humidity and dry bulb, if you input the above parameter that you can get another air properties)

802.11b and g simulator.

mimo+ofdm的功能仿真，实现基本的通信工呢(mimo+ ofdm functional simulation, the basic means of communication to achieve it)

应用于复杂网络分析时采用matlab代码的节点介数(Node betweenness complex network analysis)

利用matlab解决B样条和bizer曲线，实现一种画图过程。(Using matlab to solve the B-spline, and bizer curve, a drawing process. )