naa a22 4500 510795684 CHVBK 20180411083335.0 cr unu---uuuuu 180411e20130201xx s 000 0 eng 10.1007/s11277-011-0468-3 doi (NATIONALLICENCE)springer-10.1007/s11277-011-0468-3 A Comparison of Energy Detectability Models for Cognitive Radios in Fading Environments [Elektronische Daten] [Selami Ciftci, Murat Torlak] In this work, we first analyze the accuracy of different energy detector models in approximating the exact solution in AWGN. These models motivate us to develop approximation analysis to address energy detection for fading channels. Our analysis develops approximation that has almost the same performance as the exact solution in Rayleigh channels. Our new model is simple enough to derive the relationship between the required number of samples (N) and the signal-to-noise ratio for a single Rayleigh channel similar to the one obtained for AWGN channels. We also define a fading margin for link budget calculations that relates N in fading channels to AWGN channels. Furthermore, we analyze the impact of multiple antennas for cognitive radios considering two receiver diversity schemes and quantify the improvement in performance regarding this margin. All the analytical results derived in this paper are verified by simulations. Finally, we have implemented and verified energy detection models in our multiple antenna wireless testbed. Springer Science+Business Media, LLC., 2012 Cognitive radios nationallicence Spectrum sensing nationallicence Energy detector nationallicence Rayleigh fading nationallicence Receiver diversity nationallicence Ciftci Selami R & D Department, Turk Telekom, AS, Ankara, Turkey aut Torlak Murat Department of Electrical Engineering, The University of Texas at Dallas, 75080, Richardson, TX, USA aut Wireless Personal Communications Springer US; http://www.springer-ny.com 68/3(2013-02-01), 553-574 0929-6212 68:3<553 2013 68 11277 https://doi.org/10.1007/s11277-011-0468-3 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11277-011-0468-3 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Ciftci Selami R & D Department, Turk Telekom, AS, Ankara, Turkey aut NATIONALLICENCE 700 1- Torlak Murat Department of Electrical Engineering, The University of Texas at Dallas, 75080, Richardson, TX, USA aut NATIONALLICENCE 773 0- Wireless Personal Communications Springer US; http://www.springer-ny.com 68/3(2013-02-01), 553-574 0929-6212 68:3<553 2013 68 11277 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer