Abstract
In a recent paper [J. Acoust. Soc. Am. Suppl. 1 82, S73 (1987)], the effect of realistic ambient noise on narrow‐band matched‐field processing in both hydrophone space and mode space was examined. A significant result of that study was that correlated noise degraded the performance of the matched‐field processor in hydrophone space much more than it did in mode space. In this paper, the previous work is extended to broadband in both hydrophone space and mode space. Using computer simulations, the performance of broadband conventional and broadband modal matched‐field processing is compared at various bandwidths and various mixtures of correlated and white components in the ambient noise field. Since the averaging of correlated noise (which causes the modal processor to perform better than the conventional processor in realistic noise fields) depends on the number of propagating modes, the effect of varying the center frequency of these processors is also examined.
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