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Rank-Constrained Beamforming for MIMO Cognitive Interference Channel
Joint Authors
Zhang, Duoying
Zhang, Yao
Wu, Zujian
Du, Huiqin
Source
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-11, 11 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-05-24
Country of Publication
Egypt
No. of Pages
11
Main Subjects
Telecommunications Engineering
Abstract EN
This paper considers the spectrum sharing multiple-input multiple-output (MIMO) cognitive interference channel, in which multiple primary users (PUs) coexist with multiple secondary users (SUs).
Interference alignment (IA) approach is introduced that guarantees that secondary users access the licensed spectrum without causing harmful interference to the PUs.
A rank-constrained beamforming design is proposed where the rank of the interferences and the desired signals is concerned.
The standard interferences metric for the primary link, that is, interference temperature, is investigated and redesigned.
The work provides a further improvement that optimizes the dimension of the interferences in the cognitive interference channel, instead of the power of the interference leakage.
Due to the nonconvexity of the rank, the developed optimization problems are further approximated as convex form and are solved via choosing the transmitter precoder and receiver subspace iteratively.
Numerical results show that the proposed designs can improve the achievable degree of freedom (DoF) of the primary links and provide the considerable sum rate for both secondary and primary transmissions under the rank constraints.
American Psychological Association (APA)
Zhang, Duoying& Zhang, Yao& Wu, Zujian& Du, Huiqin. 2016. Rank-Constrained Beamforming for MIMO Cognitive Interference Channel. Mobile Information Systems،Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1111380
Modern Language Association (MLA)
Zhang, Duoying…[et al.]. Rank-Constrained Beamforming for MIMO Cognitive Interference Channel. Mobile Information Systems No. 2016 (2016), pp.1-11.
https://search.emarefa.net/detail/BIM-1111380
American Medical Association (AMA)
Zhang, Duoying& Zhang, Yao& Wu, Zujian& Du, Huiqin. Rank-Constrained Beamforming for MIMO Cognitive Interference Channel. Mobile Information Systems. 2016. Vol. 2016, no. 2016, pp.1-11.
https://search.emarefa.net/detail/BIM-1111380
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1111380