131223

锐利信道仿真程序，已经调试通过，有详细的注释，非常有用(sharp channel simulation procedures, testing has passed, detailed notes, very useful!)

根据标记图用不同颜色给图像叠加标记。可以用于图像边缘和中心凸现(marker map with different colors to the image superimposed marker. Edge can be used to highlight and center)

//////// OFDMA //////////// No. of Subcarriers NS = 512 Input Generation x = rand(1,NS)>0.5 fftlength = 512

OFDM 对频偏非常敏感，文件主要是基于导频方法的频偏估计(OFDM is very sensitive to frequency offset, frequency offset file is mainly based on the pilot estimates)

平方根法程序 输入变量为一个n阶正定矩阵A，输出的结果为下三角矩阵L(Square root law procedures)

介绍粒子滤波算法的程序，具有一定的指导意义(Particle filter algorithm describes the procedure has certain guiding significance to)

Navier_Stokes_simulation 是NS方程的数值模拟很好的实例。对于N_S方程很感兴趣的人可以借鉴参考(Navier_Stokes_simulation NS equation numerical simulation is a good example. For those who are interested in N_S equation can draw reference)

经典粒子群算法的matlab实现。用函数进行测试实验，并给出算法寻优迭代的效果图(Classical PSO algorithm matlab. Experiments with test functions, and gives an iterative optimization algorithm renderings)

Wireless Sensor Network Energy Optimization Using Particle Swarm Optimizaiton

正交频分复用（OFDM）是一种特殊的多载波传输技术。它可以有效地对抗多径衰落，能够以很高的频谱利用率来实现高速数据传输。分析介绍了OFDM系统的基本原理及系统性能，以Matlab为开发平台，仿真了OFDM系统的误码率，仿真结果表明OFDM系统在较低信噪比下也具有较好的性能(Orthogonal Frequency-division Multiplexing（OFDM） is a special kind of multi-cartier transmission technology. It can effectively overcome multi-path fading and increase the spectral usage efficiency to implement high-speed data transmission. This paper analyzes the basic principle of OFDM system and system performance, and simulates the Bit Error Rate （BER） of OFDM system on the platform of Matlab. The simulation results show that the OFDM has a good performance.[)