一种机载单站相位干涉仪解模糊算法

Algorithm of Solving Interferometer Phase Difference Ambiguity by Airborne Single Position

在机载单站无源定位系统中,相位干涉仪测向解模糊的实现方式通常有两种:长、短基线相结合的方法以及基于双基线系统余数定理算法.双基线系统余数定理算法不需要限制最短基线长度小于半波长、只需选择基线长度互质,天线数量适中,易于实现.文章对该算法的基本原理及算法实现进行了详细论述,并对正确解模糊对附加相位干涉仪测量精度要求给出了理论分析,最后通过仿真验证了该算法的有效性,为机载单站无源定位的工程实现提供了一定的理论依据.

There are two main methods for solving interferometer phase difference ambiguity in systems of passive localization by airborne single position. One is based on combination of long baseline and short baseline, and the other is based on remainder theorem of bi-baseline system. Because the algorithm based on remainder theorem of bi-baseline system just requires that the lengths of baselines are relatively prime and it is unnecessary to confine the lowest limit of baseline length less than half a wavelength, and the number of antennas are moderate, so it is easy to carry out. The principles and the realization procedure are discussed, and the precision request for measurement of the additive phase interferometer to solve ambiguity correctly is analyzed theoretically. Then the validity of the algorithm is proved by simulation. So this algorithm as the theory basis for engineering realization of passive localization by airborne single position is effective.