Electronic warfare channelizer signal processing algorithms

ABSTRACT Passive direction finding is an integral function of EW and ELINT systems. The ability to produce direction-of-arrival information in a timely, curate manner is strongly influenced by both the direction finding techniques employed and theprocessing algorithms. The processing algorithms must detect a signal, classify it as being a signal of interest, extract the signal's parameters, including its direction-of-arrival, control the receiver, and interface with the system's mission computer.This paper describes a direction finding receiver that uses an optical processor to extract the direction-of-arrival information fromthe signal environment and the processing algorithms required to support the optical processor. Keywords: acousto-optics, channelizers, direction finding 1. INTRODUCTION Several optical processing systems have been developed under the ARPA Transition of Optical Processors into Systems (TOPS) initiative. The Precision Direction Finder (PDF) channelizer develOped by Harris under this initiative was