Joseph E Marquis

US Patent:

62950177, Sep 25, 2001

Filed:

Jun 27, 1988

Appl. No.:

7/211728

Inventors:

Alex Ivanov - Acton MA
Joseph E. Marquis - Londonderry NH
Robert M. Girard - Hudson NH
Wesley T. Dull - Chelmsford MA

Assignee:

Raytheon Company - Lexington MA

International Classification:

G01S 736
G01S 1300

US Classification:

342 17

Abstract:

A radar receiver adapted to detect and track a narrow band jammer is shown to include logic circuitry adapted successively to sense jamming signals from such a jammer to determine the extant frequency of the speed gate when the amplitude of the automatic gain control signal increases and to determine whether or not the received signals are coherent, and, finally, if the received signals are not coherent, to produce a tracking control signal effective to cause tracking of the narrow band jammer.