Detection of narrowband sources by an array
D.R. Farrier, T.J. Hicks · IEE Proceedings F Communications Radar and Signal Processing · 1983
Adaptive array techniques which seek to optimise the passive detection of an acoustic narrowband source under ideal conditions are well established. The paper gives details of a frequency-domain technique which has modest hardware requirements and yet is capable of operation in a highly nonstationary environment. In addition, the algorithm enhances both signal/noise gain and detectability when mismatch occurs, particularly for the important case of low input signal/noise ratio. The suggested technique includes linear interpolation, and yet is shown to give near-optimal performance.