一种基于有限记忆算法的干涉仪解模糊纠错方法

An Ambiguity-Resolving Error Correctiion Method of Interferometer Based on Limited Memory Algorithm

针对在通道相位误差较大时常规干涉仪测角解模糊算法频繁出错的问题,提出了一种基于有限记忆算法的干涉仪解模糊检测与纠错方法。利用干涉仪逐次递推测角算法解模糊的结果估计出角度和整周模糊值的初始值,在此基础上进行角度和整周模糊值的有限记忆递推,识别并纠正逐次递推测角算法中出错的解模糊测角数据,期望得到正确的解模糊结果,以保证后续角度数据的处理精度。仿真结果表明,有限记忆纠错算法能够有效地识别并纠正逐次递推解模糊测角算法中存在的模糊值出错问题,降低干涉仪解模糊的出错概率。此方法对其它体制的相位干涉仪测角解模糊纠错也具有一定指导意义。

A limited memory algorithm-based ambiguity error correction method for solving ihe frequent error of ambiguity-resolving algorithm in phase interferometer under large phase error between channels is proposed. In this method, results of successive recursive ambiguity-resolving algorithm are used to estimate the initial value of angle and the integer cycle ambiguity value, and to recure the angle and the integer cycle ambiguity value with limited memory. The method can identify and correct the ambiguity-resolving error of angle-measuring data, thus ensuring the processing accuracy of following angle data. Simulation results show that the limited memory error correction algorithm can effectively solve the problem of fuzzy angle error and reduce the interferometer ambiguity-resolving error probability. This method also has certain guiding significance for the other phase interferometer systems.