Title :
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
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;
Conference_Titel :
Military Communications Conference, 1994. MILCOM '94. Conference Record, 1994 IEEE
Conference_Location :
Fort Monmouth, NJ
Print_ISBN :
0-7803-1828-5
DOI :
10.1109/MILCOM.1994.473991
