ACM SIGMOBILE Mobile Computing and Communications Review
Burst-Error Correction Strategies in a Slotted DS-CDMAMobile Satellite Channel
Wireless Personal Communications: An International Journal
Adaptive Retransmission Diversity with Packet Combining for Slotted DS/CDMA Packet Radio Networks
Wireless Personal Communications: An International Journal
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The throughput and delay characteristics of a land-mobile satellite channel are analyzed for both slotted ALOHA. And slotted direct-sequence CDMA (code division multiple access), using binary phase shift keying (BPSK) modulation and forward error correction coding (FEC). In the case of CDMA, the application of path diversity techniques-maximal ratio combining and selection diversity-is also taken into account. Packet success probabilities are derived for both slow and fast fading, in order to evaluate the throughput and delay. Numerical results are presented for arbitrary code lengths and for specific values of the number of resolvable paths. It is shown that CDMA can offer a substantial improvement over slotted ALOHA, especially when the chip time is less than the delay spread