MATLAB-gui-voice-

万哲先的经典版本《代数和编码》，对于编码方面学习具有重要意义。(Zhe-Xian Wan classic version algebra and coding, for the coding to learn of great significance.)

说明：  该程序包括了通信系统的相关仿真程序（matlab），并给出了QPSK、MPSK、BPSK等调制方式的相关matlab仿真程序。(The procedures include the communications system simulation related procedures (Matlab), and gives a QPSK, MPSK, such as BPSK modulation of Matlab simulation program.)

说明：  FM调制模型,用simulink做的，希望与大家交流，共同进步。(fm modulation model in matlab/simulink)

最速下降法求解非线性方程组，此程序求解了【6x-sin（y）-50=0 cos（x）-4y-70=0】这一方程的解，大家可以把方程组改换，应用于自己的题目，例子。(Steepest descent method for solving nonlinear equations, this procedure solved 【6x-sin (y)-50 = 0 cos (x)-4y-70 = 0】 solution of this equation, we can change the equations, applications in their own subject, example.)

Matlab中虽然有很多解方程的函数，但对于一般线性方程，有无穷个解时，却不能算出一个特解和基础解系，这几个函数可以实现这个功能。(Matlab Although there are many solutions to the equation function, but for the general linear equations, Infinite Solutions months, they can not penetrate a special solution and infrastructure solutions, which have several functions to achieve this function.)

通过读取GPS RINEX格式观测和星历文件，实现了GPS伪距单点定位，经过数据验证，该算法定位结果有效。(By reading the GPS RINEX format observation and ephemeris file, the GPS pseudorange single point positioning is realized, and the positioning result is valid through data verification.)

Encryption algorithms are becoming more necessary to ensure data is securely transmitted over insecure communication channels. FOX is a recently developed algorithm and its structure is based on the already proven IDEA (International Data Encryption Algorithm) cipher. FOX is a symmetric (private key) block cipher. Its top-level structure uses the Lai-Massey scheme and the round functions used in the scheme are substitution permutation networks (SPN). Its flexibility lies in the fact that it can be efficiently implemented in hardware and software. We report some of the first results of implementing the cipher on an FPGA

首先分析了瑞利衰落信道统计特性，并在此基础上给出了clarke模型，然后提出仿真方法，包括成形滤波法、jakes仿真模型及其多种改进方法，接着阐述了上述仿真模型的软件实现过程，并利用matlab进行了计算机仿真，然后给出衰落信号的仿真信号和分析结果，仿真结果证明了提出的仿真模型与理论曲线匹配度高，可以很好地模拟无线衰落信道(First analyze the statistical properties of the Rayleigh fading channel, and clarke model is given on this basis, and then asked the simulation methods, including the forming of the filter method, the the jakes simulation model and a variety of improvement, then described the simulation model of the software implementationprocess, and using matlab computer simulation, and then gives the simulated signals and analysis results of the fading signals, simulation results show the proposed simulation model with the theoretical curve to match high, can simulate the wireless fading channel)

This code is to compress an image using DCT algorithm in matlab

本程序是应用ｍａｔｌａｂ程序编写的计算火箭发动机压力对应时间变化程序，程序中的公式和参数可以根据计算时间情况进行修改。(use matlab code to build a function to calculate the presure- time , the equation and paremeter in the code can be modified depended on your need)