Title :
Performance of multi-beam CDMA-based LEO satellite systems in a Rice-lognormal channel
Author :
Fu, Hongyi ; Bi, Guoan ; Arichandran, K.
Author_Institution :
Center for Wireless Commun., Nat. Univ. of Singapore, Singapore
fDate :
4/1/1999 12:00:00 AM
Abstract :
The performance of multi-beam code-division multiple-access (CDMA)-based low Earth orbit (LEO) systems with convolutional coding and soft decision Viterbi decoding is analyzed. The multiple access interference due to all visible interferers of the given satellite is taken into account. The results show that the interference coming from the users located outside the footprint but still seen by the given satellite has a nontrivial effect on the system capacity. The multiple access interference, though, can be reduced by increasing the elevation restraint of each satellite footprint. Estimates on this reduction are given.
Keywords :
Rician channels; Viterbi decoding; antenna radiation patterns; code division multiple access; convolutional codes; error statistics; interference suppression; log normal distribution; mobile satellite communication; multibeam antennas; personal communication networks; phase shift keying; radiofrequency interference; satellite antennas; spread spectrum communication; BER; BPSK; DS-CDMA; PCN; Rice-lognormal channel; code-division multiple-access; convolutional coding; elevation restraint; low Earth orbit; multi-beam CDMA-based LEO satellite systems; multiple access interference reduction; perfect power control; performance; personal communication services; satellite antenna radiation; satellite footprint; soft decision Viterbi decoding; system capacity; Bismuth; Bit error rate; Convolutional codes; Decoding; Low earth orbit satellites; Multiaccess communication; Multiple access interference; Performance analysis; System performance; Viterbi algorithm;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/4234.757197
