复化三点Gauss-lengend公式求pi，利用自然梯度算法，一个很有用的程序，非归零型差分相位调制信号建模与仿真分析 ，可以得到很精确的幅值、频率、相位估计，GPS和INS组合导航程序。- Complex of three-point Gauss-lengend the Formula pi, Use of natural gradient algorithm, A very useful program, NRZ type differential phase modulation signal modeling and simulation analysis, You can get a very accurate amplitude, frequency, phase estimation, GPS and INS navigation program.