DMCA
Cognitive code-division links with blind primary-system identification
| Venue: | IEEE Trans. Wireless Commun |
| Citations: | 8 - 6 self |
BibTeX
@ARTICLE{Li_cognitivecode-division,
author = {Ming Li and Stella N. Batalama and Dimitris A. Pados and Tommaso Melodia and Michael J. Medley and Senior Member and John D. Matyjas},
title = {Cognitive code-division links with blind primary-system identification},
journal = {IEEE Trans. Wireless Commun},
year = {},
pages = {3743--3753}
}
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Abstract
Abstract—We consider the problem of cognitive code-division channelization (simultaneous power and code-channel allocation) for secondary transmission links co-existing with an unknown primary code-division multiple-access (CDMA) system. We first develop a blind primary-user identification scheme to detect the binary code sequences (signatures) utilized by primary users. To create a secondary link we propose two alternative procedures –one of moderate and one of low computational complexity – that optimize the secondary transmitting power and binary codechannel assignment in accordance with the detected primary code channels to avoid “harmful ” interference. At the same time, the optimization procedures guarantee that the signalto-interference-plus-noise ratio (SINR) at the output of the maximum SINR linear secondary receiver is no less than a certain threshold to meet secondary transmission quality of service (QoS) requirements. The extension of the channelization problem to multiple secondary links is also investigated. Simulation studies presented herein illustrate the theoretical developments. Index Terms—Blind user identification, code-channel allocation, code-division multiple-access, cognitive radio, dynamic spectrum access, power allocation, signal-to-interference-plusnoise ratio. I.
Keyphrases
blind primary-system identification cognitive code-division link code-channel allocation secondary link harmful interference theoretical development unknown primary code-division multiple-access power allocation dynamic spectrum access secondary transmission link low computational complexity certain threshold alternative procedure signal-to-interference-plusnoise ratio maximum sinr binary codechannel assignment secondary transmitting power index term blind user identification primary user binary code sequence simultaneous power cognitive radio cognitive code-division channelization code-division multiple-access blind primary-user identification scheme secondary transmission quality simulation study secondary receiver channelization problem signalto-interference-plus-noise ratio detected primary code channel
