Accession Number : ADD006701

Title :   Communication System Beamport Sidelobe Canceller,

Corporate Author : DEPARTMENT OF THE AIR FORCE WASHINGTON DC

Personal Author(s) : Masak ,Raymond J ; Baurle,Herbert F

Report Date : 09 Oct 1979

Pagination or Media Count : 4

Abstract : Multiple interference signals in an electromagnetic wave communication system are individually discriminated against by a beamport sidelobe canceller comprising a multichannel auxiliary system in which spatial filtering of the angular sectors of interest is performed prior to sidelobe cancellation. Each spatial filter of the auxiliary system has its own adaptive control and only those interfering signals appearing in its assigned sector are operated on by that loop. The output of the main communication system receiver is summed with the outputs of the auxiliary system channels to produce a system output and an adaptive control loop feedback signal. The feedback signal initiates the generation of a cancellation signal in any adaptive control loop in which correlation of interference signals occur in both the main communication system received signal and the signal received by the auxiliary system channel to which that loop is connected. (Author)

Descriptors :   *Patents, *Electromagnetic wave filters, *Adaptive CONTROL SYSTEMS, Radio interference, Sidelobes, Cancellation, Multichannel communications, Feedback, Loops, Spatial filtering, Radio equipment, Circuit analysis

Subject Categories : Electrical and Electronic Equipment
      Non-radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE