Joint Robust Beamforming in Multi-Users Cognitive Radio System via Semidefinite Programming
50-55
30.Cnf-366 Paper View Page
Title
OPPORTUNISTIC INTERFERENCE ALIGNMENT FOR MIMO COGNITIVE NETWORKS WITH CHANNEL IMPERFECTION
Authors
Ms. Bassant Abdelhamid, Egypt-Japan University of Science and Technology, Alexandria, Egypt Prof. Maha Elsabrouty, Egypt-Japan University of Science and Technology, Alexandria, Egypt Prof. Masoud Alghoniemy, Egypt-Japan University of Science and Technology, Alexandria, Egypt Prof. Salwa Elramly, Egypt-Japan University of Science and Technology, Alexandria, Egypt
Abstract
Cognitive radio is a system which allows unlicensed user (secondary user) to transmit over the same band of the licensed user (primary user) simultaneously. This has to be done without affecting the licensed user’s performance. Different techniques are used for designing the unlicensed user’s transceiver. Interference alignment (IA) proves its superiority over these existing techniques. However, the challenge in using IA is its performance degradation with the existence of channel imperfection. In consequence, in this paper, an Interference Alignment (IA) scheme that addresses the uncertainty in the channel estimation is presented. The proposed scheme allows a secondary user equipped with multiple antennas (MIMO) to use the same frequency band already occupied by pre-existing primary user via aligning and minimizing the interference on the primary user even when no complete knowledge of the channel is available. The proposed algorithm minimizes the interference of the secondary user’s transmission on primary user. Numerical results prove the ability of the novel interference alignment scheme to preserve the primary user’s transmission rate in case of channel estimation imperfections.
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
44-49
Topics
Cognitive MIMO Radios Flexible Physical Layer Solutions
ISSN
2227-331X
DOI
BibTeX
@inproceedings{366MCWC2012,
title={OPPORTUNISTIC INTERFERENCE ALIGNMENT FOR MIMO COGNITIVE NETWORKS WITH CHANNEL IMPERFECTION},
author={Bassant Abdelhamid, and Maha Elsabrouty, and Masoud Alghoniemy, and Salwa Elramly},
booktitle={2012 Global Congress on Mobile Computing and Wireless Communications (GC-MCWC 2012)},
year={2012},
pages={44-49},
doi={}},
organization={Mosharaka for Research and Studies}
}
