Priority-Based Zero-Forcing in Spectrum Sharing Cognitive Systems

We consider a spectrum sharing scenario between cognitive radio (CR) users and a licensed primary user (PU), in which the PU is not able to successfully transmit data to its destined receiver. The cognitive base station (CBS) in the vicinity of the primary network, offers its help to transmit the pr...

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Bibliographic Details
Published in:IEEE communications letters 2013-02, Vol.17 (2), p.313-316
Main Authors: Hamdi, K., Hasna, M. O., Ghrayeb, A., Letaief, K. B.
Format: Article
Language:English
Subjects:
Applied sciences
Array signal processing
Cognitive radio
Detection, estimation, filtering, equalization, prediction
Exact sciences and technology
Information, signal and communications theory
Interference
Operation, maintenance, reliability
Quality of service
Radiocommunication specific techniques
Radiocommunications
relaying
Resource management
Signal and communications theory
Signal, noise
spectrum sharing
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Throughput
Transmission and modulation (techniques and equipments)
Vectors
zero-forcing beamforming
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Summary:We consider a spectrum sharing scenario between cognitive radio (CR) users and a licensed primary user (PU), in which the PU is not able to successfully transmit data to its destined receiver. The cognitive base station (CBS) in the vicinity of the primary network, offers its help to transmit the primary data. In return, the CR system is able to share the spectrum with the primary system. We formulate an opportunistic spectrum sharing approach that determines the transmit beamforming weights in order to maximize the overall throughput of the CRs while guaranteeing the quality-of-service (QoS) of the PU. By applying algorithms based on zero-forcing beamforming (ZFB) along with optimal power allocation, the proposed approach is able to achieve cognitive and primary systems requirements.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2013.010313.122195