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说明：  计算光纤模场分布和传播常数，输入模式的阶数，计算得到各类模式的模场分布。直接运行main，在其中修改参数，至少可以计算5层光纤结构。(Calculation of optical mode field distribution and propagation constant, the order input mode, calculated by various types of mode-mode field distribution. Direct run main, in which the modified parameters can be calculated for at least 5 layer fiber structure.)

Given k = 4 n = 7 and G= 1 1 0 1 0 0 0 0 1 1 0 1 0 0 1 1 1 0 0 1 0 1 0 1 0 0 0 1 i. produce 16 possible message blocks ii. produce all the pertaining codeword vectors

ask调制解调程序，包括序列的产生，加噪，频谱分析，低通滤波输出，抽样判决等(ask modulation and demodulation process, including the sequence generation, noise, spectrum analysis, low-pass filtered output, sample sentences, etc.)

PID控制matlab仿真第三版完整仿真程序(PID controller program,very good)

可以学习使用大量的matlab程序，帮助初学者解决问题(You can learn to use a lot of MATLAB programs)

THE FASTEST WAY TO SORT N NUMBERS sortN library

在数字通信系统中，滤波器是其中重要部件之一， 滤波器特性的选择直接影响数字信号的恢复。在数字信号接收中， 滤波器的作用有两个方面，第一是使滤波器输出有用信号成分尽可能强；第二是抑制信号带外噪声，使滤波器输出噪声成分尽可能小，减小噪声对信号判决的影响。 (In digital communication system, the filter is one of the important components of the filter characteristics of the choice of a direct impact on digital signal recovery. In the digital signal receiver, the filter s role is twofold, first is to filter the output useful signal components strong as possible the second is the signal-band noise suppression, so that filter output noise components as small as possible, reducing the noise on the signal the impact of decision.)

Discrete Fourier Transform in MATLAB

it is a matlab program for ga sa tabu sworm opt heuristics we can also use matlab here. or there can

Extremely fast and lightweight WBXML parser, implementing only the subset of WBXML that EAS uses (as defined in the EAS specification).