Title :
Pseudo BER Based SNR Estimation for Energy Detection Scheme in Cognitive Radio
Author :
Tian, Tian ; Iwai, Hisato ; Sasaoka, Hideichi
Author_Institution :
Grad. Sch. of Eng., Doshisha Univ., Kyotanabe, Japan
Abstract :
In this paper, an energy detection scheme based on the pseudo bit error rate (BER) estimation is investigated. In the proposed scheme, the basic strategy is to use the pseudo BER to estimate the signal-noise-ratio (SNR) of primary signal for energy detection at the cognitive users. Threshold and sensing length are updated with the estimated SNR afterward. We have shown that this modified energy detector outperforms traditional energy detector with the noise uncertainty and reliably alleviate the SNR wall effect.
Keywords :
cognitive radio; error statistics; signal detection; SNR wall effect; cognitive radio; cognitive users; energy detection scheme; modified energy detector; noise uncertainty; primary signal; pseudoBER-based SNR estimation; pseudobit error rate estimation; sensing length; Bit error rate; Estimation; Sensors; Signal to noise ratio; Uncertainty;
Conference_Titel :
Vehicular Technology Conference (VTC Spring), 2012 IEEE 75th
Conference_Location :
Yokohama
Print_ISBN :
978-1-4673-0989-9
Electronic_ISBN :
1550-2252
DOI :
10.1109/VETECS.2012.6240226
