复化三点Gauss-lengend公式求pi，LDPC码的完整的编译码，matlab开发工具箱中的支持向量机，搭建OFDM通信系统的框架，仿真效率很高的，利用自然梯度算法，在MATLAB中求图像纹理特征，车牌识别定位程序的部分功能。- Complex of three-point Gauss-lengend the Formula pi, Complete codec LDPC code, matlab development toolbox support vector machine, Build a fr a mework OFDM communication system, High simulation efficiency, Use of natural gradient algorithm, In the MATLAB image texture feature, Part of the license plate recognition locator feature.