Power control error in a CDMA satellite communication system

Author

Monk, Anton M. ; Milstein, Laurence B.

Author_Institution

Dept. of Electr. & Comput. Eng., California Univ., San Diego, La Jolla, CA, USA

fYear

1994

fDate

2-5 Oct 1994

Firstpage

495

Abstract

An adaptive power control (APC) scheme is essential to overcome shadowing and distance losses in a land mobile satellite system. Such a scheme, implemented on the uplink, ensures that all users´ signals arrive at the base station with equal average power as they move within the satellite spot beam-an important requirement in a CDMA system. Because of the lengthy round-trip delay on a satellite link, closed-loop power control systems are only of marginal benefit. Monk et al (1994) proposed an open-loop APC scheme to counteract the effects of large scale losses. A model was developed to characterize the performance of the APC. In this paper, we use the model to derive the overall system performance of shadowed users on the uplink of a coherent, asynchronous, coded CDMA system, on a land mobile satellite link

Keywords

adaptive control; code division multiple access; land mobile radio; mobile satellite communication; power control; telecommunication control; CDMA; adaptive power control; coherent asynchronous system; land mobile satellite system; open-loop power control error; round-trip delay; satellite communication system; satellite link; shadowing; uplink; Adaptive control; Adaptive systems; Base stations; Error correction; Multiaccess communication; Power control; Power system modeling; Programmable control; Satellite communication; Shadow mapping;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference, 1994. MILCOM '94. Conference Record, 1994 IEEE

Conference_Location

Fort Monmouth, NJ

Print_ISBN

0-7803-1828-5

Type

conf

DOI

10.1109/MILCOM.1994.473991

Filename

473991