cross_layer

仿真实现调制解调的过程,使用此程序需要MATLAB开发工具(Simulation of the process of modulation and demodulation, using this program requires MATLAB development tools)

说明：  这是一个基于GUI系统。该软件已经过测试，并基于MATLAB版本6.0与信号处理和通信工具箱选项以上。(This is a GUI-based system. The software has been tested and based on MATLAB version 6.0 with signal processing and communication over the toolbox option.)

结构体在matlab中的应用，matlab教程，word格式(structure used in matlab)

Pattern search (also known as direct search, derivative-free search, or black-box search) is a family of numerical optimization methods that does not require a gradient. As a result, it can be used on functions that are not continuous or differentiable. One such pattern search method is "convergence" (see below), which is based on the theory of positive bases. Optimization attempts to find the best match (the solution that has the lowest error value) in a multidimensional analysis space of possibilities.

计算时间序列的熵信号，用以获取信号统计分析(Calculate the entropy of the signal time series, statistical analysis to obtain the signal)

本源码为使用遗传算法解决函数极值问题的简单的小例子，新手一看就能懂(The source function for the use of genetic algorithm to solve the problem of the simple little extreme example, the novice can understand a look)

ce programme permet de calculer la transformer en ondelette sous matlab

OFDM信号在无线通信中会受到多普勒频移的影响，从而影响了OFDM信号的正交性，引起载波间的干扰和OFDM信号符号间的干扰，本代码先形成含有N个二进制码元的信号，而这个信号的前半部分和后半部分的信号是一样的，然后根据把这个信号调制成OFDM信号，最后接收端根据这个OFDM信号估计出多普勒因子(OFDM signal in a wireless communication will be subject to Doppler shift of influence, thus affecting the OFDM signal orthogonality, causing interference and interference between the OFDM signal symbol between carriers, the code first formed comprising N binary symbols signal, and the first and second halves of this signal is the same signal, and then the OFDM signal according to the estimated Doppler factor modulates the signal to the OFDM signal received, the last side)

建立了基于MATLAB语言的七段译码器的仿真模型，通过了系统验证。(MATLAB language is established based on the seven-segment decoder simulation model validation by the system.)

使用mat2huff进行编码，进一步说明霍夫曼编码的压缩性能！显示其压缩比例，以及其图像的对比！(Encoded using mat2huff to further clarify the Huffman coding compression performance! Shows the compression ratio and the image contrast!)