Title :
Capacity enhancement with adaptive arrays in a CDMA-based LEO satellite system
Author :
Fu, Hongyi ; Bi, Guoan ; Arichandran, K.
Author_Institution :
Center for Wireless Commun., Nat. Univ. of Singapore, Singapore
Abstract :
The capacity enhancement achieved by adaptive antenna arrays at the base station in a CDMA-based multi-beam LEO system is investigated. The system outage probability is evaluated based on a comprehensive analysis of multiple access interference which includes the effects of power control algorithm, the channel fading and shadowing, and the antenna characteristics. Because the statistically optimal beams can be formed by adaptive arrays, the severe multiple access interference in satellite CDMA can be significantly suppressed. The numerical results demonstrate that there is a substantial increase in the uplink capacity by employing adaptive arrays at the base station
Keywords :
adaptive antenna arrays; channel capacity; code division multiple access; fading channels; interference suppression; mobile satellite communication; probability; CDMA; LEO satellite system; adaptive antenna arrays; base station adaptive arrays; capacity enhancement; channel fading; interference suppression; multi-beam satellite system; multiple access interference; numerical results; outage probability; power control algorithm; shadowing; statistically optimal beams; uplink capacity; Adaptive arrays; Algorithm design and analysis; Antenna arrays; Base stations; Fading; Low earth orbit satellites; Multiple access interference; Power control; Probability; Shadow mapping;
Conference_Titel :
Vehicular Technology Conference Proceedings, 2000. VTC 2000-Spring Tokyo. 2000 IEEE 51st
Conference_Location :
Tokyo
Print_ISBN :
0-7803-5718-3
DOI :
10.1109/VETECS.2000.851618
