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
- Author
- 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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