一种低复杂度的相关干涉仪测向算法

A Low Complexity Direction Finding Algorithm Based on Correlative Interferometer

摘要:

针对传统相关干涉仪测向系统相位差参考数据库的采集工作时间周期长、工作量大的问题,提出了使用理论相位差代替采集相位差的测向方法。针对实际测向系统中由遮挡引起的个别阵元接收信号弱、相位差估计偏差大的问题,提出了一种相位差测量误差大的阵元检测和相位差替代方法,利用接收信号较强的阵元估计的相位差推算并替代接收信号弱的阵元对应的相位差。通过仿真和测试,在单通道相关干涉仪的系统上验证了所提算法的有效性。

Abstract:

In order to solve the problem that it takes traditional correlationinterferometer direction finding system long time and large work to collect phase differencereference database, a method of theoretical phase difference instead of collecting phasedifference is proposed, Some antenna array elements may receive weak radio frequency signa.because of occlusion, leading to a large deviation of phase difference estimation. A detectionand phase difference substitution method for large phase difference measurement error isproposed, The phase difference estimated by the array elements which receive strong signal isused to calculate and replace the phase difference of the elements which receive weak signalThe proposed algorithm is validated on a single-channel correlation interferometer system bysimulation and test.