Closed-form Outage and Diversity Analysis of Opportunistic Nulling for Secondary Spectrum Sharing

Title
Closed-form Outage and Diversity Analysis of Opportunistic Nulling for Secondary Spectrum Sharing
Authors
김동우
Keywords
Null-space projection; Opportunistic ing; Singular value decomposition; Channel state information; Cognitive radio; Communication channels (information theory); Radio transmission; Singular value decomposition; Closed-form expression; Diversity analysis; Null space; Nulling; Numerical results; Perfect channel state information; Secondary spectrums; Transmission diversity; Antennas
Issue Date
2015-05
Publisher
Institute of Electrical and Electronics Engineers Inc.
Citation
In: Proceedings of 21st European Wireless Conference, European Wireless 2015, Proceedings of 21st European Wireless Conference, European Wireless 2015
Abstract
In this paper, we study a cognitive radio (CR) communication system in which multiple antennas assist the secondary user to achieve transmission diversity, while the constraint of zero interference to the primary user is satisfied. In particular, by assuming perfect channel state information between a secondary transmitter (ST) and a primary receiver (PR) at ST, a closed form expression for a opportunistic ing scheme, which guarantees to meet zero interference between ST and PR, is obtained. Further, ns antennas of ST and np antennas of PR provide ns-np diversity order for one primary user. In addition, all primary users use the orthogonal spectrum. Finally, if there are M primary users, we can achieve ∑m=1 M(ns-np m ) diversity order. Numerical results regarding the effects of the number of the primary users, ST's antennas and PR's antennas are provided to evaluate the performances of the proposed scheme. © VDE Verlag GMBH, Berlin, Offenbach, Germany.
URI
https://www.scopus.com/record/display.uri?eid=2-s2.0-84979697123&origin=inward&txGid=05d9cf438cb56f2943787e4dd0091d1fhttp://hdl.handle.net/20.500.11754/34004
ISBN
9783800739769
Appears in Collections:
COLLEGE OF ENGINEERING SCIENCES[E](공학대학) > ELECTRICAL ENGINEERING(전자공학부) > Articles
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