An Improved Two-Element Almost Omnidirectional Receiver

摘要

The sum of spectra has been suggested as a method for providing improved signal detectability from a plurality of sensors while retaining omnidirectionality. This report describes an alternative procedure for the two-element case that, while not quite omnidirectional, offers a decided advantage in detection performance over the power sum scheme. It involves taking the logical union of the spectrum of the sum of the hydrophone outputs and the spectrum of the difference of the hydrophone outputs. A comparison of the two systems is presented and it is shown that the latter scheme is almost always better than the former. (Author)