Please use this identifier to cite or link to this item:
|Title:||Robust downlink beamforming in multiuser MISO cognitive radio networks with imperfect channel-state information||Authors:||Gharavol, E.A.
|Keywords:||Cognitive radio network (CR-Net)
imperfect channel-state information (CSI)
multiuser multiple-inputsingle-output (MISO) communication
|Issue Date:||Jul-2010||Citation:||Gharavol, E.A., Liang, Y.-C., Mouthaan, K. (2010-07). Robust downlink beamforming in multiuser MISO cognitive radio networks with imperfect channel-state information. IEEE Transactions on Vehicular Technology 59 (6) : 2852-2860. ScholarBank@NUS Repository. https://doi.org/10.1109/TVT.2010.2049868||Abstract:||This paper studies the problem of robust downlink beamforming design in a multiuser multiple-inputsingle-output (MISO) cognitive radio network (CR-Net) in which multiple secondary users (SUs) coexist with multiple primary users (PUs) of a single-cell primary radio network (PR-Net). It is assumed that the channel-state information (CSI) for all relevant channels is imperfectly known, and the imperfectness of the CSI is modeled using a Euclidean ball-shaped uncertainty set. Our design objective is to minimize the transmit power of the SU-Transmitter (SU-Tx) while simultaneously achieving a lower bound on the received signal-to-interference-plus-noise ratio (SINR) for the SUs and imposing an upper limit on the interference power (IP) at the PUs. The design parameters at the SU-Tx are the beamforming weights, and the proposed methodology to solve the problem is based on the worst-case design scenario through which the performance metrics of the design are immune to variations in the channels. The original problem is a separable homogeneous quadratically constrained quadratic problem (QCQP), which is an NP-hard problem, even for uncertain CSI. We reformulate our original design problem to a relaxed semidefinite program (SDP) and then investigate three different approaches based on convex programming. Finally, simulation results are provided to validate the robustness of the proposed methods. © 2006 IEEE.||Source Title:||IEEE Transactions on Vehicular Technology||URI:||http://scholarbank.nus.edu.sg/handle/10635/57299||ISSN:||00189545||DOI:||10.1109/TVT.2010.2049868|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Feb 23, 2020
WEB OF SCIENCETM
checked on Feb 14, 2020
checked on Feb 18, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.