一个解决声纳系统同频干扰的新思路

多平台联合作战将是未来海上作战的重要形式之一,多部主动声纳的同时存在使声兼容问题十分突出。由于友舰直达波经历的是单程传播,其强度往往比经历了双程传播的目标回波大的多。通过波形设计可以获得相关系数小的声纳波形,虽然可以从一定程度上缓解声兼容问题,但由于获得的增益有限,并不能从根本上解决这一问题。本文通过对常规检测器的修正,引入能量归一化的概念,有效地消除了能量对检测器的影响,从而解决了这一问题。同时本文还提出了与现有声纳信号处理体系相兼容的频域实现方法,使该算法在工程上的实现成为可能。计算机仿真证明,这一方法是正确有效的。

A Novel method to cope with the acoustic compatibility problem

Joint operation of multiple platforms is an importance in naval warfare,which makes the acoustic compatibility a problem that must be seriously considered and carefully resolved.Due to the fact that the direct blast of the same frequency from friendly vessels undergoes one-way propagation transmission loss,its strength is much greater than that of the true target echoes which suffer from two-way propagation.Signals with relatively small correlations can be acquired through waveform design technique,but the obtained gains are limited,and cannot resolve the acoustic problems entirely.In this paper,an energy normalized new detector is proposed to eliminate the effect of the signal energy.At the same time,an implementation scheme compatible with the present sonar signal processing system is proposed,which facilitates the practical engineering realization of the algorithm.Computer simulation proves the validity of the proposed method.