应用于拖线阵声呐的一种自适应旁瓣干扰抵消器的性能分析

拖线阵声呐要求在全方位上对强干扰进行抑制,但当强干扰是宽带并与信号方向偏离较大时,自适应干扰抵消器的性能会受到限制。本文对一种具有抽头延迟线结构的部分自适应旁瓣抵消器(PASC)在用于抑制大角度宽带干扰时的性能进行了分析。数值结果表明,在合理选取参数和结构的情况下,这种PASC在用来抵消一定带宽和偏离角的强干扰时,具有较好的抵消性能。

Performance analysis of a wideband adaptive interference canceller used in towed linear array sonar

For the long range performance of towed linear array sonar and its requirement about restraining rehicle noise,the problem that several strong interferences in all the bearing should be suppressed is raised.When strong interferances have wideband and deviate from signal direction,the performance of adaptive interference canceller is limited by a large Fractional Dispersion.This paper discusses the perpormance of a partially adaptive sidelobe canceller which is used to suppress,wideband and large bearing interference in towed linear array sonar.The results of numerical method state that the partially adaptive sidelobe canceller provided witheproper parameter and construction has good cancelling performance for interference with suitable band and bearing.