naa a22 4500 510792766 CHVBK 20180411083325.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11277-012-0855-4 doi (NATIONALLICENCE)springer-10.1007/s11277-012-0855-4 Farraj Abdallah Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX, USA aut Impact of Cognitive Communications on the Performance of the Primary Users [Elektronische Daten] [Abdallah Farraj] This article investigates how the performance of the primary user is affected by the presence of a spectrum-sharing cognitive user. The performance under both cooperative and non-cooperative cognitive schemes is considered. Primary user's transmission rate, average channel capacity, and average bit error rate are considered as the performance measures. Moreover, the performance is compared with that of a wireless user in a Rayleigh channel, and the gain in performance is found. In addition, a process on how the primary user can accommodate a cognitive user without sacrificing its own performance is explained. Results of this work indicate that the primary user experiences a very close performance in both non-cooperative cognitive and Rayleigh environments. However, the primary user enjoys a pronounced better performance in the cooperative cognitive mode. Springer Science+Business Media New York, 2012 Bit error rate nationallicence Cognitive communications nationallicence Cooperative systems nationallicence Outage probability nationallicence Spectrum sharing nationallicence Transmission rate nationallicence Wireless Personal Communications Springer US; http://www.springer-ny.com 71/2(2013-07-01), 975-985 0929-6212 71:2<975 2013 71 11277 https://doi.org/10.1007/s11277-012-0855-4 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-012-0855-4 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Farraj Abdallah Department of Electrical and Computer Engineering, Texas A&M University, College Station, TX, USA aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 71/2(2013-07-01), 975-985 0929-6212 71:2<975 2013 71 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer