Modified Acousto-Optic Adaptive Processor (Mod-AOAP)
Abstract
Multipath jamming noise introduced into a radar antenna's sidelobes effectively reduces the radar's 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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1992
- Accession Number
- ADA261983
Entities
People
- Christopher W. Keefer
- John E. Malowicki
- Paul M. Payson
Organizations
- Rome Laboratory