分解传统波束形成的反卷积

Deconvolution of decomposed conventional beamforming.

作者信息

Yang T C

机构信息

College of Information Science and Electronic Engineering, Zhejiang University, Hangzhou, 310058,

出版信息

J Acoust Soc Am. 2020 Aug;148(2):EL195. doi: 10.1121/10.0001764.

DOI:10.1121/10.0001764

PMID:32873045

Abstract

A recently proposed deconvolution method applied to conventional beamforming (CBF) shows a much higher array gain (AG) than CBF in theory, thereby providing the possibility for detecting a weak signal with a much lower signal-to-noise ratio (SNR). However, simulated data processing shows an effective AG that decreases with decreasing SNR. The reason for the performance loss is analyzed. A method based on deconvolution of the signal subspace of the CBF outputs is shown to recover most of the AG loss. It is used to trace a weak signal in bearing and time.

摘要

最近提出的一种应用于传统波束形成（CBF）的反卷积方法在理论上显示出比CBF高得多的阵列增益（AG），从而为检测信噪比（SNR）低得多的弱信号提供了可能性。然而，模拟数据处理表明，有效AG会随着SNR的降低而减小。分析了性能损失的原因。一种基于对CBF输出的信号子空间进行反卷积的方法被证明可以恢复大部分AG损失。它被用于在方位和时间上追踪弱信号。