Wideband interference cancellation using dsp algorithms

Abstract

A method and system is provided for detecting and characterizing pulsed threat radar emitters through heavy in-band interference. System includes an advanced digital signal processing method provides spatial and temporal interference cancellation, super-resolution direction-finding, and high resolution spectrum analysis techniques. The system receives the digitized output of a discriminator bank and produces highly accurate threat pulse radio frequency estimates. The invention further provides a two-channel configuration for a DF subsystem, to perform adjacent-beam direction-finding through severe interference environments. The invention provides increased sensitivity, increased frequency accuracy, and up to 40 dB of increased interference look-through capability in ES system but remains transparent to ES system functioning and to ES system operators.

1 . A system for extracting signals of interest from interference, comprising:
 an input comprising at least one signal of interest and interference;   a plurality of discriminators configured to generate a series of digitized vectors of an autocorrelation function from the input;   one or more dominant mode prediction (“DMP”) processors adapted to cancel the interference; and   a plurality of signal processing algorithms including algorithms which, when executed by the one or more DMP processors, are operative to identify presence of the at least one signal of interest and algorithms for cancelling the interference using the digitized vectors.