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Asymptotic Optimality of Random PSK Signature Ensembles

Alexey Dudkov, Valery Ipatov, Asymptotic Optimality of Random PSK Signature Ensembles. In: Proceedings of the IEEE 6th International Symposium on Electromagnetic Compatibility and Electromagnetic Ecology, 90-93, 2005.

Abstract:

Selection of a proper signature ensemble is the point of a special care in designing code division multiple access (DS CDMA) systems. When the receiver complexity beyond that of a single user algorithm is not affordable, Welch-bound ensembles minimizing intensity of the multiple access interference (MAI) are optimal. In this paper we show that for random signature sets the mean square deviation of MM power from the Welch bound drops in nearly inverse proportion with growth of K/N, where K is number of users and N is the spreading factor. Thereby, the fact of asymptotic (K/spl Gt/N) convergence in probability of random sets to the Welch-bound ones is demonstrated.

BibTeX entry:

@INPROCEEDINGS{inpDuIp05a,
  title = {Asymptotic Optimality of Random PSK Signature Ensembles},
  booktitle = {Proceedings of the IEEE 6th International Symposium on Electromagnetic Compatibility and Electromagnetic Ecology},
  author = {Dudkov, Alexey and Ipatov, Valery},
  pages = {90-93},
  year = {2005},
}

Belongs to TUCS Research Unit(s): Communication Systems (ComSys)

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