naa a22 4500 510795919 CHVBK 20180411083336.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11277-011-0469-2 doi (NATIONALLICENCE)springer-10.1007/s11277-011-0469-2 Performance of Primary Users in Spectrum Sharing Cognitive Radio Environment [Elektronische Daten] [Abdallah Farraj, Eman Hammad] This paper investigates the performance of the primary user in a multiuser cognitive radio environment. Using spectrum sharing method, multiple cognitive users compete to share a channel dedicated to the primary user in order to transmit their data to a common receiver unit. Only one cognitive user is scheduled to share the channel, and to do so, its transmit power should not increase the primary user's outage probability above a certain limit. The average bit error rate and the average channel capacity of the primary user are derived in this setup for different cognitive scheduling schemes. The performance measures of the primary user are found to depend on the cognitive user's scheduling criterion and on the parameters of the communication environment. Springer Science+Business Media, LLC., 2011 Cognitive communications nationallicence User scheduling nationallicence Spectrum sharing nationallicence Outage probability nationallicence Bit error rate nationallicence Channel capacity nationallicence Farraj Abdallah Department of Electrical and Computer Engineering, Texas A&M University, 77843, College Station, TX, USA aut Hammad Eman Department of Electrical and Computer Engineering, Texas A&M University, 77843, College Station, TX, USA aut Wireless Personal Communications Springer US; http://www.springer-ny.com 68/3(2013-02-01), 575-585 0929-6212 68:3<575 2013 68 11277 https://doi.org/10.1007/s11277-011-0469-2 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-011-0469-2 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Farraj Abdallah Department of Electrical and Computer Engineering, Texas A&M University, 77843, College Station, TX, USA aut NATIONALLICENCE 700 1- Hammad Eman Department of Electrical and Computer Engineering, Texas A&M University, 77843, College Station, TX, USA aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 68/3(2013-02-01), 575-585 0929-6212 68:3<575 2013 68 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer