Accession Number:

ADA517994

Title:

Generalized FFT Beamsteering

Descriptive Note:

Journal article

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC RADAR DIV

Personal Author(s):

Report Date:

2008-01-01

Pagination or Media Count:

4.0

Abstract:

A receive antennas beam, the direction of maximum gain or sensitivity, need not be rigidly oriented to the physical antenna. An array antenna, hundreds or thousands of small antenna elements laid out along a line or, more usefully, on a 2D lattice, offers an electronically controlled, agile beam or even multiple beams associated with multiple antenna outputs, a technology that can enable a military radar to precisely track many objects in flight simultaneously. The classic approach to efficiently realizing many simultaneous beams uses fast Fourier transforms FFTs for computational efficiency but severely restricts choices of system parameters. Generalized FFT beamsteering as described here loosens those restrictions to give system designers a larger tradeoff space and therefore opportunities for cost savings and performance gains, particularly for large digital radar arrays.

Subject Categories:

  • Electrical and Electronic Equipment
  • Numerical Mathematics
  • Computer Programming and Software
  • Active and Passive Radar Detection and Equipment
  • Electricity and Magnetism
  • Radiofrequency Wave Propagation

Distribution Statement:

APPROVED FOR PUBLIC RELEASE