Effects of Satellite-Borne Transmitter Nonlinearities on FDM-AGIPA Systems

Masaharu FUJITA  

IEICE TRANSACTIONS (1976-1990)   Vol.E65   No.5   pp.229-233
Publication Date: 1982/05/25
Online ISSN: 
Print ISSN: 0000-0000
Type of Manuscript: PAPER
Category: Antenna and Propagation

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In Adaptive Ground-Implemented Phased Array (AGIPA) system, signals received with each element of the array on-board a satellite are transferred to the Earth station for further adaptive processing to form a radiation pattern. For transmission from the satellite to the Earth station, a certain signal multiplex method will be applied. Among the multiplex methods, the simplest one is a frequency-division-multiplex (FDM) technique. This paper deals with the effect of satellite-borne transmitter non-linearity when FDM technique is applied to the AGIPA system. Analysis, assuming a two-element array, shows that for the FDM-AGIPA sysmte, the nonlinearity causes spurious interferences which seriously affect the performance of AGIPA system for interference rejection.