Accession Number:

AD0745302

Title:

A Digital Beamformer for Narrowband Sonar Systems.

Descriptive Note:

Technical rept.,

Corporate Author:

TEXAS UNIV AUSTIN APPLIED RESEARCH LABS

Report Date:

1972-04-03

Pagination or Media Count:

115.0

Abstract:

Near the end of 1968, the study of geometric quantization of input data for digital replica correlation led to the concept of a digital beamformer using the same technique. Geometric AD GAD provides a wide digital dynamic range with a small number of bits. Such a beamformer was proposed, using quadrature sampling and digital phase shifting to approximate desired time delays. A computer simulation was used to determine feasibility and, as a result, a particular version applicable to narrowband systems using cylindrical arrays was implemented and tested. Results show that such a system provides a good approximation to a fully linear, phase shift beamformer. Author

Subject Categories:

  • Acoustic Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE