Downlink beamforming design for cognitive cellular systems

Conference paper

Le, T. and Navaie, K. 2014. Downlink beamforming design for cognitive cellular systems. 2014 IEEE Wireless Communications and Networking Conference (WCNC). Istanbul, Turkey 06 - 09 Apr 2014 IEEE. pp. 1188-1193 https://doi.org/10.1109/WCNC.2014.6952318
TypeConference paper
TitleDownlink beamforming design for cognitive cellular systems
AuthorsLe, T. and Navaie, K.
Abstract

We propose a novel scheme to design downlink beamforming vectors in a cognitive cellular network which shares radio spectrum with a primary communication system. We formulate an optimization problem which minimizes the cognitive base station transmit power and the induced interference on the primary users and keeps them below predefined system thresholds. This is subject to providing a certain level of signal-to-interference-plus-noise ratio to the secondary users. We propose an iterative algorithm to solve the optimization problem. The convergence of the proposed iterative algorithm is analytically proved. Simulation results verify that the proposed algorithm quickly converges to the optimal solution. Results also indicate that the proposed algorithm guarantees the transmit power and interference constraints. We then compare the proposed scheme with a benchmark system based on the previous methods. Comparisons show significant reduction in the total interference at reasonable cost of the cognitive base station transmit power.

Conference2014 IEEE Wireless Communications and Networking Conference (WCNC)
Page range1188-1193
Proceedings Title2014 IEEE Wireless Communications and Networking Conference (WCNC)
SeriesIEEE Wireless Communications and Networking Conference
ISSN1525-3511
Electronic1558-2612
ISBN
Electronic9781479930838
PublisherIEEE
Publication dates
Print09 Apr 2014
Online20 Nov 2014
Publication process dates
Deposited05 Jun 2015
Accepted18 Dec 2013
Output statusPublished
Digital Object Identifier (DOI)https://doi.org/10.1109/WCNC.2014.6952318
Web of Science identifierWOS:000392912400207
Web address (URL) of conference proceedingshttps://ieeexplore.ieee.org/xpl/conhome/6923023/proceeding
LanguageEnglish
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