Accession Number:

ADA634246

Title:

Adaptive-Adaptive Narrowband Subarray Beamforming

Descriptive Note:

Technical memo.

Corporate Author:

NAVAL UNDERSEA WARFARE CENTER NEWPORT DIV NEW LONDON CT NEW LONDON DETACHMENT

Personal Author(s):

• Nuttall, James A.

Report Date:

1994-02-10

Pagination or Media Count:

137.0

Abstract:

A two-stage adaptive narrowband beamformer is introduced. Adaptive beamformers give high-resolution angle-of-arrival estimates, but at considerable computational cost. To reduce the computational cost, Abraham and Owsley have introduced a two-stage beamformer -- conventional first-stage, adaptive second-stage -- which gives near full adaptive resolution. This beamformer, however, can produce spatial aliases, or false alarms, in the presence of dominant interferers. This memorandum introduces an adaptive-adaptive beamformer which does not produce false alarms, while maintaining near full adaptive resolution and low computational cost.

Descriptors:

• *BEAM FORMING
• *NARROWBAND
• ADAPTIVE SYSTEMS
• ARRIVAL
• FALSE ALARMS
• HIGH RESOLUTION

Subject Categories:

• Optics
• Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE