信号处理中的旋转不变子空间法，LDPC码的完整的编译码，对于初学matlab的同学会有帮助，GPS和INS组合导航程序，考虑雨衰 阴影 和多径影响，预报误差法参数辨识-松弛的思想。- Signal Processing ESPRIT method, Complete codec LDPC code, Matlab for beginner students will help, GPS and INS navigation program, Consider shadow rain attenuation and multipath effects Prediction Error Method for Parameter Identification- the idea of relaxation.