( 5 ) mfpic ( matched field postbeamformer interference canceller ) is proposed to cancel tow ship ' s noise . the advantage of mfpic is that it can be used to cancel the tow ship ' s noise for all arrival directions . furthermore , this new approach can be used to detect weak target , which has the same bearing angle of a strong interference ( 5 )将平面波波束形成后干扰抵消与匹配场处理技术进行有机结合，探索性地提出了拖线阵声纳本舰干扰的匹配场抵消方法和匹配场处理后的干扰抵消方法，为本舰多途干扰抵消、水面强干扰抑制和水下弱目标检测提供了新的技术途径。
Results rectify that matched field processing based on ray travel time delay is insensitive to the mismatch of sound speed proflle , although the mismatch of ocean bottom depth and receiver location is bad to matched field processing , different forms of cost fimctions could decline the sensitivity 计算结果表明，基于声传播时延的匹配场定位对声速分布失配是不敏感的。虽然接收基阵位置倾斜和海洋深度误差对匹配场处理影响较大，但只要选择适当的代价函数，可以得到克服。
