Spectral-estimation

Communication project image compression dpcm huffman coding

定步长ODE4、ODE5算法，用法和ode45相似 唯一不同的就是ode45是[t,y]=ode45(), 这个是y=ode4()，因为是定步长的(Fixed-step ODE4, ODE5 algorithms, usage, and the only difference is similar to ode45 ode45 is [t, y] = ode45 (), this is y = ode4 (), because the step length is fixed)

这个程序是杨儒贵研究生教材《高等电磁场理论》中的程序，讲解电磁场后向散射(This procedure is expensive Yang Ru graduate textbook "Advanced Electromagnetic Field Theory" program, to explain electromagnetic backscatter)

A polyalphabetic cipher is any cipher based on substitution, using multiple substitution alphabets. The Vigenère cipher is probably the best-known example of a polyalphabetic cipher, though it is a simplified special case.Polyalphabetic substitution ciphers are useful because the are less easily broken by frequency analysis, however if an attacker knows for instance that the message has a period n, then he simply can individually frequency analyze each cipher alphabet. The number of letters encrypted before a polyalphabetic substitution cipher returns to its first cipher alphabet is called its period. The larger the period, the stronger the cipher. Of course, this method of encryption is certainly not secure by any definition and should not be applied to any real-life scenarios.

Beam width is the aperture angle from where most of the power is radiated. The two main considerations of this beam width are Half Power Beam Width (HPBW) and First Null Beam Width (FNBW).

个集合遗传算法，蚁群算法，粒子群算法的混合算法解决TSP问题的MATLAB程序(Collection of genetic algorithm, ant colony algorithm for hybrid particle swarm optimization algorithm to solve TSP MATLAB program)

加窗处理的信号分析，矩形窗与hamming窗的比较。DTFT，DFT等(The windowing processing of signal analysis)

归纳了基于WLAN和WSN的异构网络协同定位算法研究中的关键问题指出了如何根据终端位置环境同时搜索WLAN和无线传感器网络以及改进后的网络融合定位算法( The key problems of heterogeneous network based on WLAN and WSN in the study of collaborative localization algorithm were summarized. According to terminal location environment, the searching of WLAN and WSN at the same time and the improved network fusion localization algorithm were pointed out)

次程序是用MATLAB语言编写的高斯赛德尔迭代法，可用于求解线性微分方程组。(Second procedure is used MATLAB language high Sisaideer iterative method can be used to solve linear differential equations.)

Program to plot the BER of OFDM in Frequency selective channel