OFDMSystemSmulation

it is a software ti localize wireless sensor network

说明：  利用matlab软件完成OFDM应用在数字水印的应用研究(OFDM using matlab software applications to complete the application in digital watermarking)

维特比(aqui_cdma acqui fft cdma)

turbo码高码率2/3码率的matlab编码实现，译码方式为log-MAP算法，删除矩阵为[1 1 1 0](achieve high rate of turbo codes)

通信系统中实现残留边带调制，用matlab实现。调制解调过程(Communication systems to achieve VSB modulation, with the realization of matlab. The process of modulation and demodulation)

说明：  熟悉matlab环境 熟悉MATLAB的主要操作命令； （2） 学会简单的矩阵输入和数据读写； （3） 掌握简单的绘图命令； （4） 学习用MATLAB编程。 (Familiar environment, familiar with the MATLAB matlab major operating commands (2) Institute of simple matrix input and data read and write (3) to master a simple drawing commands (4) learn to use MATLAB programming.)

说明：  本文阐述了扩展频谱通信技术的理论基础和实现方法，利用MATLAB 提供的可视化 工具Simulink 建立了扩频通信系统仿真模型，详细讲述了各模块的设计，并指出了仿真建模 中要注意的问题。在给定仿真条件下，运行了仿真程序，得到了预期的仿真结果。同时，利 用建立的仿真系统，研究了扩频增益与输出端信噪比的关系，结果表明，在相同误码率下， 增大扩频增益，可以提高系统输出端的信噪比，从而提高通信系统的抗干扰能力。 (This paper describes the theory of spread-spectrum communication technology and implementation methods based on the use of visualization tools provided by MATLAB Simulink to establish a spread spectrum communication system simulation model, described in detail the design of each module, and pointed out that the simulation modeling to note problem. In the given simulation conditions, running a simulation program to obtain the desired simulation results. Meanwhile, the use of the simulation system to study the spreading gain and the relationship between the output signal to noise ratio, results show that the same bit error rate, increased spreading gain can increase the system output signal to noise ratio, thereby enhancing communication system disturbance.)

图像处理，在WORD中写有区域生长算法的matlab代码，可直接用，也可以改进。(Image processing, written in WORD region growing algorithm matlab code, can be directly used, it can be improved.)

基于FrFT的时变幅度LFM信号参数估计，采用二维峰值搜索算法，后用一维曲线拟合，大大减少了计算量。(The parameter estimation of LFM signal based on FrFT is based on two dimensional peak search algorithm and one dimension curve fitting, which greatly reduces the computation.)

WCDMA单蜂窝网的路径损耗 cost231-hata模型(WCDMA single cellular network model of path loss cost231-hata)