On the diversity gains of user scheduling in the cognitive radio parallel access channel

C. Masouros; F. Khan; T. Ratnarajah; M. Sellathurai

doi:10.1109/GLOCOM.2011.6133630

On the diversity gains of user scheduling in the cognitive radio parallel access channel

C. Masouros, F. Khan, T. Ratnarajah, M. Sellathurai

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

2 Citations (Scopus)

Abstract

This paper investigates the multiuser diversity introduced by opportunistic user selection in the cognitive radio parallel access channel (CR-PAC), where multiple cognitive users request to access the spectral resources of the licensed user. Assuming a simple cognitive user selection strategy based on maximizing the received signal-to-interference-plus- noise ratio (SINR), we study the statistics of the SINR at the cognitive receiver. We then use this to analytically calculate the diversity gains introduced in the system due to the selection of one cognitive user amongst multiple candidates, compared to the case when only one cognitive user exists in the network and no selection occurs. Finally, we investigate potential gains for the primary network from this user selection. The results show a close match between analytical expressions and simulation results, while a tight lower bound for the multiuser gain is derived in closed form.

Original language	English
Title of host publication	2011 IEEE Global Telecommunications Conference, GLOBECOM 2011
DOIs	https://doi.org/10.1109/GLOCOM.2011.6133630
Publication status	Published - 19 Jan 2012
Externally published	Yes
Event	54th Annual IEEE Global Telecommunications Conference: Energizing Global Communications - Global Communications Conference, Exhibition & Industry Forum, Houston, United States Duration: 5 Dec 2011 → 9 Dec 2011 Conference number: 54 http://globecom2011.ieee-globecom.org/about.html

Conference

Conference	54th Annual IEEE Global Telecommunications Conference
Abbreviated title	GLOBECOM 2011
Country/Territory	United States
City	Houston
Period	5/12/11 → 9/12/11
Internet address	http://globecom2011.ieee-globecom.org/about.html

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10.1109/GLOCOM.2011.6133630Licence: Unspecified

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title = "On the diversity gains of user scheduling in the cognitive radio parallel access channel",

abstract = "This paper investigates the multiuser diversity introduced by opportunistic user selection in the cognitive radio parallel access channel (CR-PAC), where multiple cognitive users request to access the spectral resources of the licensed user. Assuming a simple cognitive user selection strategy based on maximizing the received signal-to-interference-plus- noise ratio (SINR), we study the statistics of the SINR at the cognitive receiver. We then use this to analytically calculate the diversity gains introduced in the system due to the selection of one cognitive user amongst multiple candidates, compared to the case when only one cognitive user exists in the network and no selection occurs. Finally, we investigate potential gains for the primary network from this user selection. The results show a close match between analytical expressions and simulation results, while a tight lower bound for the multiuser gain is derived in closed form.",

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author = "C. Masouros and F. Khan and T. Ratnarajah and M. Sellathurai",

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AU - Masouros, C.

AU - Khan, F.

AU - Ratnarajah, T.

AU - Sellathurai, M.

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N2 - This paper investigates the multiuser diversity introduced by opportunistic user selection in the cognitive radio parallel access channel (CR-PAC), where multiple cognitive users request to access the spectral resources of the licensed user. Assuming a simple cognitive user selection strategy based on maximizing the received signal-to-interference-plus- noise ratio (SINR), we study the statistics of the SINR at the cognitive receiver. We then use this to analytically calculate the diversity gains introduced in the system due to the selection of one cognitive user amongst multiple candidates, compared to the case when only one cognitive user exists in the network and no selection occurs. Finally, we investigate potential gains for the primary network from this user selection. The results show a close match between analytical expressions and simulation results, while a tight lower bound for the multiuser gain is derived in closed form.

AB - This paper investigates the multiuser diversity introduced by opportunistic user selection in the cognitive radio parallel access channel (CR-PAC), where multiple cognitive users request to access the spectral resources of the licensed user. Assuming a simple cognitive user selection strategy based on maximizing the received signal-to-interference-plus- noise ratio (SINR), we study the statistics of the SINR at the cognitive receiver. We then use this to analytically calculate the diversity gains introduced in the system due to the selection of one cognitive user amongst multiple candidates, compared to the case when only one cognitive user exists in the network and no selection occurs. Finally, we investigate potential gains for the primary network from this user selection. The results show a close match between analytical expressions and simulation results, while a tight lower bound for the multiuser gain is derived in closed form.

KW - Cognitive radio

KW - multiuser gain

KW - multiuser selection

KW - spectrum sharing

KW - user scheduling

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ER -

On the diversity gains of user scheduling in the cognitive radio parallel access channel

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