DocumentCode :
1707165
Title :
Sensing-throughput tradeoff for OFDM-based cognitive radio under outage constraints
Author :
Sharkasi, Youssif Fawzi ; Ghogho, Mounir ; McLernon, Des
Author_Institution :
Sch. of Electron. & Electr. Eng., Univ. of Leeds, Leeds, UK
fYear :
2012
Firstpage :
66
Lastpage :
70
Abstract :
Sensing-throughput tradeoff under outage constraints has been studied before with an energy detector (ED). However, the ED does not work well in the presence of noise power uncertainty. So we study sensing-throughput tradeoff by using an autocorrelation detector (AD) for an OFDM signal. In this paper, we derive a closed form expression for the false alarm probability over both Nakagami-m and Rician fading channels. This false alarm probability relies upon a new threshold which takes into account an outage constraint on the probability of detection due to fading environments. The results show that the throughput improves with an increase in the Nakagami-m fading parameter and the Rician factor. In addition, the throughput improves dramatically with an initial increase of the number of multipath and then levels out.
Keywords :
Nakagami channels; OFDM modulation; Rician channels; AD; Nakagami-m channels; Nakagami-m fading parameter; OFDM signal; OFDM-based cognitive radio; Rician factor; Rician fading channels; autocorrelation detector; energy detector; fading environments; false alarm probability; outage constraints; sensing-throughput tradeoff;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Wireless Communication Systems (ISWCS), 2012 International Symposium on
Conference_Location :
Paris
ISSN :
2154-0217
Print_ISBN :
978-1-4673-0761-1
Electronic_ISBN :
2154-0217
Type :
conf
DOI :
10.1109/ISWCS.2012.6328331
Filename :
6328331
Link To Document :
بازگشت