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Technical University of Crete
Technical University of Crete
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| URI: | http://purl.tuc.gr/dl/dias/79601B07-6637-4BD2-BC19-6236C167FF5A | ||
| Year | 2005 | ||
| Type of Item | Peer-Reviewed Journal Publication | ||
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| Bibliographic Citation | S. Gopalan, G. N. Karystinos, and D. A. Pados, “Capacity, throughput, and delay of slotted ALOHA DS-CDMA links with adaptive space-time auxiliary-vector receivers,” IEEE Transactions on Wireless Communications, vol. 4, no. 1, pp. 79-92, Jan. 2005. | ||
| Appears in Collections |
—We investigate the user capacity, throughput, anddelay characteristics of a mobile slotted ALOHA direct-sequencecode-division-multiple-access (DS-CDMA) link with dedicatedsignatures under multipath fading and packet-rate adaptive antennaarray signal reception. For a given system transmission bitrate, the packet size is designed to be sufficiently small to conformwith the coherence time of the channel. Then, on an individualpacket-by-packet basis, a phase-ambiguous spatial-temporalchannel estimate is produced by a blind (unsupervised) eigensubspaceprocedure. The space–time channel estimate is phasecorrected via a few pilot packet mid-amble bits and used forjoint spatial-temporal multiple-access-interference suppressionaccording to the principles of auxiliary-vector filtering. Subsequently,packet success probabilities are derived in the presenceor absence of forward error correction and are used to evaluatethe throughput and delay characteristics of the link
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