Adaptive beamformer delay compensation for active sonar

James M. Alsup

doi:10.1117/12.190892

28 October 1994 Adaptive beamformer delay compensation for active sonar

James M. Alsup

Proceedings Volume 2296, Advanced Signal Processing: Algorithms, Architectures, and Implementations V; (1994) https://doi.org/10.1117/12.190892
Event: SPIE's 1994 International Symposium on Optics, Imaging, and Instrumentation, 1994, San Diego, CA, United States

Abstract

Delay compensation as a preliminary step to adaptive beamforming (ABF) is described. Such compensation can be used for linear or planar arrays whenever the temporal width of a signal's matched-filter output peak is significantly shorter than the propagation time across the array. Preliminary delay compensation is not normally used in passive ABF processing since the signals being processed are usually steady-state or can be regarded as such. However, when transient events much be processed, such as those associated with either impulsive echoes or with matched-filter outputs of large TW signals, then compensation prior to ABF may be required in order to obtain the full array gain for the signal of interest. Methods for achieving wide-band delay compensation are described, the parameters associated with defining the minimal compensation required are explained, and losses suffered when compensation is not used are discussed.

Citation Download Citation

James M. Alsup "Adaptive beamformer delay compensation for active sonar", Proc. SPIE 2296, Advanced Signal Processing: Algorithms, Architectures, and Implementations V, (28 October 1994); https://doi.org/10.1117/12.190892

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