Title :
Performance of DS-CDMA with imperfect power control operating over a low earth orbiting satellite link
Author :
Vojcic, Branimir R. ; Pickholtz, Raymond L. ; Milstein, Laurence B.
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., George Washington Univ., Washington, DC, USA
fDate :
5/1/1994 12:00:00 AM
Abstract :
The analysis of both the performance and capacity of direct sequence CDMA in terrestrial cellular systems has been addressed in the technical literature. It has been suggested that CDMA be used as a multiple access method for satellite systems as well, in particular for multispot beam low Earth orbit satellites (LEOS). One is tempted to argue that since CDMA works well on terrestrial links, it will nominally work as well on satellite links. However, because there are fundamental differences in the characteristics of the two channels, such as larger time delays from the mobile to the base station and smaller multipath delay spreads on the satellite channels, the performance of CDMA on satellite links cannot always be accurately predicted from its performance on terrestrial channels. In the paper, the authors analytically derive the performance of a CDMA system which operates over a low Earth orbiting satellite channel. They incorporate such effects as imperfect power control and dual-order diversity to obtain the average probability of error of a single user
Keywords :
code division multiple access; delays; diversity reception; mobile radio systems; power supplies to apparatus; satellite relay systems; telecommunication channels; DS-CDMA; LEOS; average probability of error; capacity; dual-order diversity; imperfect power control; low earth orbiting satellite link; multipath delay spreads; multiple access method; multispot beam low Earth orbit satellites; performance; satellite channels; satellite link; time delays; Base stations; Delay effects; Interleaved codes; Lasers and Electro-Optics Society; Low earth orbit satellites; Mobile communication; Multiaccess communication; Performance analysis; Power control; Propagation delay;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
