Accession Number:

ADA261983

Title:

Modified Acousto-Optic Adaptive Processor (Mod-AOAP)

Descriptive Note:

Final rept. Feb 1989-Jun 1992

Corporate Author:

ROME LAB ROME NY

Report Date:

1992-12-01

Pagination or Media Count:

35.0

Abstract:

Multipath jamming noise introduced into a radar antennas sidelobes effectively reduces the radars target detection capability. The acousto-optic adaptive processor AOAP was developed to demonstrate an optical implementation of the least mean square LMS algorithm for adaptively cancelling noise jamming. The AOAP system demonstrated 30 dB cancellation of monotone CW signals, with degraded performance as the bandwidth increased. The liquid crystal light valve LCLV, used as the integrator spatial light modulator in the AOAP, has been identified as limiting system performance. In this report we report on modifications to the AOAP. Specifically, the LCLV has been replaced with a photorefractive crystal. Cancellation performance and cancellation speed of the mod-AOAP are presented and compared to the original results.

Subject Categories:

  • Acoustooptic and Optoacoustic Devices
  • Radar Countermeasures

Distribution Statement:

APPROVED FOR PUBLIC RELEASE