A Digital Beamformer for Narrowband Sonar Systems.
TEXAS UNIV AUSTIN APPLIED RESEARCH LABS
Pagination or Media Count:
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
- Acoustic Detection and Detectors