EP 0000038 B1 19811014 - METHOD AND APPARATUS FOR CANCELLING INTERFERENCE BETWEEN AREA COVERAGE AND SPOT COVERAGE ANTENNA BEAMS
Title (en)
METHOD AND APPARATUS FOR CANCELLING INTERFERENCE BETWEEN AREA COVERAGE AND SPOT COVERAGE ANTENNA BEAMS
Publication
Application
Priority
US 80315177 A 19770603
Abstract (en)
[origin: EP0000038A1] The present invention relates to method and apparatus for substantially cancelling interference between signals using the same frequency spectrum which are received via overlapping area coverage (12) and spot coverage (e.g. 14a) antenna beams. At the transmitter where the overlapping area and spot coverage beams are concurrently transmitted, a predetermined portion of the area coverage signal is coupled into each of the spot beam signals which will be overlapped at the associated spot beam receiver area by the area coverage beam. <??>The predetermined portion coupled into each spot beam signal will have a magnitude and phase to substantially cancel the area coverage signal at the associated spot beam receiver area.
IPC 1-7
IPC 8 full level
H04B 7/15 (2006.01); H04B 7/204 (2006.01)
CPC (source: EP US)
H04B 7/2041 (2013.01 - EP US)
Designated contracting state (EPC)
BE DE FR GB NL SE
DOCDB simple family (publication)
EP 0000038 A1 19781220; EP 0000038 B1 19811014; CA 1105091 A 19810714; DE 2861149 D1 19811224; JP S542613 A 19790110; US 4145658 A 19790320
DOCDB simple family (application)
EP 78100062 A 19780601; CA 303121 A 19780511; DE 2861149 T 19780601; JP 6585878 A 19780602; US 80315177 A 19770603