基于声矢量自适应干扰抵消的逆波束形成

为得到目标清晰的时间方位历程图,提出了一种将基元域声矢量自适应抵消技术与逆波束形成(IBF)相结合的方法。IBF可以得到窄的主瓣,同时可以提高对邻近目标的方位分辨力,采用声压与振速分量组合(p+vc)作为基元域自适应抵消的参考信号,可避免端射方向不再是探测盲区。对算法进行了海试实验验证,结果表明该方法既能有效地将本艇的固定方位(本艇自噪声)干扰抵消,又可以降低目标的时间方位历程图干扰背景,使时间方位历程更加清晰,同时也可以提高p+vc的抗左右舷模糊性能。

Inverse Beamforming Based on Coherent Interference Vector Adaptive Canceling

A new method combining adaptive canceling using vector sensor and inverse beamforming (IBF) was proposed to obtain a bearing-time record with high quality. Inverse beamforming can get narrower mainlobe and increase the azimuth resolution of targets. p+v_c was regarded as the reference signal to avoid the detection blinding zone in the endfire direction. At last the new method's performance was verified by sea experiment data processing. The experiment results show that the new method can cancel the self-noise completely, decrease the interference background of target's track and improve p+v_c's ability of resolving port and starboard ambiguity.