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强干扰是制约中远程声呐性能的主要因素。对于大型声呐来说,由于过长的延时量以及过高的运算速率,抗强干扰问题始终未能解决,本文提出一种适用于大型基阵的全方位抗强干扰系统。它是自适应噪声抵消系统与一个可编程迪卡诺(DICANNE)系统的结合,在干扰与信号入射角之间的夹角比较小时,采用低采样速率的自适应噪声抵消系统;在此角度较大时,采用高采样率的DICANNE系统,从而使整个系统具有全方位抗干扰的性能。本方案在采用高性能的DSP器件时,易于实现。文中给出设计框图与硬件实施方法。
Strong interference is the main factor restricting the performance of long-range sonar. For large-scale sonar, due to the long delay and high computing speed, anti-strong interference problem has not been solved. In this paper, a comprehensive anti-interference system for large-scale array is proposed. It is a combination of an adaptive noise cancellation system and a programmable DICANNE system that uses a low sampling rate adaptive noise cancellation system when the angle between interference and the angle of incidence of the signal is relatively small. Large, the use of high sampling rate DICANNE system, so that the entire system has a full range of anti-jamming performance. The program in the use of high-performance DSP devices, easy to implement. The article gives the design of block diagram and hardware implementation.