Optimum Beamforming Subject to Multiple Linear Constraints.

Abstract

Optimum beamformers with a single look direction constraint can suffer from signal suppression problems when the optimum weights are calculated from the inverse of the signal-plus-noise cross-spectral matrix. Signal suppression occurs when the beam steer direction does not exactly correspond to the signal direction and this can occur if the number of fixed beams is small. The use of multiple linear constraints upon the optimum weights reduces this signal suppression. Multiple directional constraints can lead to ill-conditioned equations. However it is shown that the limiting solutions of multiple directional constraints are multiple derivative contraints and these do not lead to ill-conditioned equations. The ability of various derivative constraints to prevent signal suppression is analysed quantitatively. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1980
Accession Number
ADA102322

Entities

People

  • A. K. Steele

Tags

Communities of Interest

  • Electronic Warfare
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Antennas
  • Arrays
  • Beam Steering
  • Classification
  • Computer Programs
  • Department Of Defense
  • Detectors
  • Directional
  • Electrical Engineering
  • Equations
  • Frequency
  • Mathematics
  • Plane Waves
  • Security
  • Signal Processing
  • Steering
  • Technical Information Centers

Fields of Study

  • Engineering

Readers

  • Applied Combinatorial Optimization and Logic Circuit Design.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Phased Array Antenna Design.