Research Article
On Multiuser Switched Diversity Transmission for Spectrum Sharing Systems
@INPROCEEDINGS{10.4108/icst.crowncom.2012.249524, author={Marwa Qaraqe and Mohamed Abdallah and Erchin Serpedin and Mohamed-Slim Alouini}, title={On Multiuser Switched Diversity Transmission for Spectrum Sharing Systems}, proceedings={7th International Conference on Cognitive Radio Oriented Wireless Networks}, publisher={IEEE}, proceedings_a={CROWNCOM}, year={2012}, month={7}, keywords={multiuser diversity switched diversity spectrum sharing performance analysis}, doi={10.4108/icst.crowncom.2012.249524} }- Marwa Qaraqe
Mohamed Abdallah
Erchin Serpedin
Mohamed-Slim Alouini
Year: 2012
On Multiuser Switched Diversity Transmission for Spectrum Sharing Systems
CROWNCOM
IEEE
DOI: 10.4108/icst.crowncom.2012.249524
Abstract
In this paper, we develop multiuser access schemes for spectrum sharing systems whereby secondary users share the spectrum with primary users. In particular, we devise two schemes for selecting the user among those that satisfy the interference constraints and achieve an acceptable signal-to-noise ratio (SNR) level. The first scheme selects the user with the maximum SNR at the receiver, whereas in the second scheme the users are scanned in a sequential manner until an acceptable user is found. In addition, we consider two power adaptive settings. In the on/off power adaptive setting, the users transmit based on whether the interference constraint is met or not while in the full power adaptive setting, the users vary their transmission power to satisfy the interference constraint. Finally, we present numerical results of our proposed algorithms where we show the trade-off between the average spectral efficiency and average feedback load of both schemes.