Title :
Spectrum sensing over Nakagami-m/Gamma composite fading channel with noise uncertainty
Author :
De Alvarenga Silva, Wanessa ; Moraes Mota, Kim ; Silva Dias, Ugo
Author_Institution :
Dept. of Electr. Eng., Univ. of Brasilia, Brasilia, Brazil
Abstract :
In this paper, the performance analysis of energy detection-based cognitive radio systems operating over Gamma shadowed Nakagami-m fading channels are presented and investigated. The composite multipath/shadowing model provide remarkably accurate statistical characterization due considering both small-scale and large-scale fading in their physical model. In this way, admitting the noise power estimation error and noise uncertainty, the worst case of the miss detection and false-alarm probabilities are derived for cooperative and non-cooperative spectrum sensing systems. Field measurements are used to investigate in practice the usefulness of the Nakagami-m/Gamma composite fading in cooperative spectrum sensing scenarios and an excellent fitting is found. Comparisons are performed against Rayleigh/Gamma fading model, in which it is possible to notice advantage in using the Nakagami-m/Gamma distribution.
Keywords :
Nakagami channels; cognitive radio; cooperative communication; gamma distribution; multipath channels; Nakagami-m fading channel; composite multipath model; cooperative spectrum sensing systems; energy detection-based cognitive radio systems; false-alarm probabilities; field measurements; gamma composite fading channel; gamma distribution; large-scale fading; miss detection; noise power estimation error; noise uncertainty; noncooperative spectrum sensing systems; physical model; shadowing model; small-scale fading; Cognitive radio; Fading; Sensors; Signal to noise ratio; Uncertainty; Cognitive radio; Nakagami-m/Gamma distribution; noise uncertainty; spectrum sensing;
Conference_Titel :
Radio and Wireless Symposium (RWS), 2015 IEEE
Conference_Location :
San Diego, CA
DOI :
10.1109/RWS.2015.7129759