Cochannel Interference in Nonlinear QPSK Satellite Systems

Author

Kennedy, David J. ; Shimbo, Osamu

Author_Institution

INTELSAT, 409 L´´Enfant Plaza, SW, Washington, D.C., USA

Volume

29

Issue

5

fYear

1981

fDate

5/1/1981 12:00:00 AM

Firstpage

582

Lastpage

592

Abstract

Increased frequency reuse in satellite systems will result in increased levels of cochannel interference. Such interference can in fact become the limiting factor affecting system performance. In this paper, the effects of cochannel interference on the bit error rate (BER) of a QPSK satellite system are analyzed. A nonlinear satellite transponder having a specified AM-AM and AM-PM transfer characteristic is assumed. An arbitrary number of up- and downlink interferers is considered. The theoretical results are compared with results obtained from time-domain computer simulations. Two facets of the cochannel interference problem which are of particular interest are investigated: the non-Gaussian nature of the interference and the small-signal suppression which may occur for uplink interferers.

Keywords

Cochannel interference; PSK communication; Satellite communications; Bit error rate; Computer simulation; Downlink; Frequency; Interchannel interference; Quadrature phase shift keying; Satellites; System performance; Time domain analysis; Transponders;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOM.1981.1095033

Filename

1095033