ASLC系统时间域干扰技术研究

A Study on the Attack Technology on ASLC in Time Domain

从ASLC系统的时间域特性出发,深入研究了对ASLC的时间域干扰技术。首先,针对闭环ASLC系统响应时间特点及权值收敛特性,分析了脉冲干扰情况下系统收敛时间和稳态权值,得到了闭环ASLC对脉冲干扰的对消性能,理论分析和仿真结果表明,脉冲干扰对闭环ASLC系统是有效的;其次,根据信号在主辅通道间存在固有时间延迟的特点,设计了针对ASLC系统的主辅通道去相关干扰,这种干扰对于闭环和开环ASLC系统均是有效的。

In this article,the interference for adaptive side-lobe canceller( ASLC) in time domain is analyzed. Firstly,based on the characteristic of time response and weight convergence,the low duty-cycle pulse train interference performance on ASLC with closed loop is presented with the analysis of the convergence time and steady state weights. Secondly,the decorrelation interference between the main and auxilary channel is presented based on the coherent delay between the main and auxiliary channel. This interference is effective for both the open loop and closed loop ASLC.