Title :
Acoustic Vector-Sensor FFH "Blind" Beamforming & Geolocation
Author :
Wong, Kainam Thomas
Author_Institution :
Dept. of Electron. & Inf. Eng., Hong Kong Polytech. Univ., Kowloon, China
Abstract :
An acoustic direction-finding and blind interference rejection algorithm for up to three noncooperative wideband, fast frequency-hop (FFH) spread spectrum signals of unknown hop sequences and unknown arrival angles is presented. This algorithm avoids the need to adjust beamforming weights to accommodate frequency variations in the frequency-hopping signals. This approach deploys one acoustic vector-sensor (a.k.a. vector-hydrophone), which is composed of two or three spatially collocated, but orthogonally oriented, acoustic velocity-sensors plus an optional collocated pressure-sensor. The spatial collocation of all component sensors comprising such an acoustic vector-sensor frees the beamforming weights of any dependence on the signals´ hopping frequencies.
Keywords :
array signal processing; blind source separation; spread spectrum communication; FFH; acoustic direction-finding; acoustic vector sensor; acoustic vector-sensor; acoustic velocity-sensors; beamforming weights; blind beamforming; blind interference rejection algorithm; component sensors; fast frequency-hop; frequency variations; frequency-hopping signals; geolocation; noncooperative wideband; optional collocated pressure-sensor; spatial collocation; spread spectrum signals; unknown arrival angles; unknown hop sequences; vector-hydrophone; Acoustic sensors; Acoustic waves; Array signal processing; Direction of arrival estimation; Frequency; Interference; Navigation; Spread spectrum communication; Underwater acoustics; Wideband;
Journal_Title :
Aerospace and Electronic Systems, IEEE Transactions on
DOI :
10.1109/TAES.2010.5417173
