Adaptive-Adaptive Narrowband Subarray Beamforming

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.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Feb 10, 1994
Accession Number
ADA634246

Entities

People

  • James A. Nuttall

Organizations

  • Naval Undersea Warfare Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Adaptive Filters
  • Algorithms
  • Angle Of Arrival
  • Bandpass Filters
  • Bandwidth
  • Beam Forming
  • Beam Steering
  • Detectors
  • Electrical Engineering
  • False Alarms
  • Floating Point Operations
  • Frequency
  • High Resolution
  • Integrals
  • Narrowband
  • Signal Processing
  • Two Dimensional

Fields of Study

  • Engineering

Readers

  • Military History
  • Phased Array Antenna Design.
  • Regression Analysis.