Joint Robust Beamforming in Multi-Users Cognitive Radio System via Semidefinite Programming
50-55
30.Cnf-367 Paper View Page
Title
Joint Robust Beamforming in Multi-Users Cognitive Radio System via Semidefinite Programming
Authors
Mrs. Betty Nagy, Ain Shams University, Cairo, Egypt Prof. Maha Elsabrouty, Egypt-Japan University of Science and Technology, Alexandria, Egypt Prof. Salwa Elramly, Egypt-Japan University of Science and Technology, Alexandria, Egypt
Abstract
In cognitive radio (CR) networks with multi-antenna links, secondary users (SUs) can transmit over the same spectrum as primary users (PUs) on the condition that the SUs interference must not exceed a certain level on PUs. Our target is to provide the SUs with a minimum acceptable quality-of-service (QoS), while keeping the interference to the PUs below a given threshold with exploiting multi antennas at the PUs. However, it is not easy to know the channel state information on the links to PUs, thus uncertainty should be considered on those links.
In this paper we present a study of the optimal transmit beamforming weights of the SUs network in the presence of uncertainty on multiple-input multiple-output (MIMO) PU links that is modeled by two different methods. Moreover the two models of the problem are solved using semidefinite programming (SDP) optimization technique and they are both compared to a previous model using computer simulations.
3rd Mosharaka International Conference on Mobile Computing and Wireless Communications (MIC-MCWC 2012)
Congress
2012 Global Congress on Mobile Computing and Wireless Communications (GC-MCWC 2012), 15-17 June 2012, Palma de Mallorca, Spain
Pages
50-55
Topics
Interference Modeling and Mitigation Adaptive Antennas and Beamforming
ISSN
2227-331X
DOI
BibTeX
@inproceedings{367MCWC2012,
title={Joint Robust Beamforming in Multi-Users Cognitive Radio System via Semidefinite Programming},
author={Betty Nagy, and Maha Elsabrouty, and Salwa Elramly},
booktitle={2012 Global Congress on Mobile Computing and Wireless Communications (GC-MCWC 2012)},
year={2012},
pages={50-55},
doi={}},
organization={Mosharaka for Research and Studies}
}
