用Matlab仿真turbocode的算法，即编码结构-using Matlab turbocode algorithm, namely coding structure

可以接受原始GPS信号的数据，以便于下一步进行差分编码，实现精确定位的算法，是一个快速精准的方法。-Can accept raw GPS signal data, so that in the next step to differential coding, to achieve precise positioning of the algorithm is a fast and accurate method.

介绍了LDPC编码中的PEG算法和DE(Density Evolution)算法。(The PEG algorithm and DE (Density Evolution) algorithm in LDPC coding are introduced.)