Title :
Log-likelihood ratio based signal sensing strategy for cognitive radios
Author :
Waadt, Andreas ; Viessmann, A. ; Kocks, Christian ; Spiegel, Christoph ; Burnic, Admir ; Jung, Peter ; BRUCK, Guido H. ; Lim, Euntaek ; Lee, Hyeon Woo
Author_Institution :
Lehrstuhl fur Kommunikations Tech., Univ. Duisburg-Essen, Duisburg, Germany
Abstract :
Cognitive radios require spectrum sensing. IEEE 802.22 defines constraints on conceivable spectrum sensing techniques. In order to fulfill theses constraints on the required detection probability and allowed false alarm probability, the signal sensing requires a certain sensing time period and an appropriately adjusted decision threshold. This manuscript presents a novel dynamic spectrum sensing scheme which is based on soft outputs. The novel scheme allows the reduction of the sensing time in order to save calculation and power effort.
Keywords :
cognitive radio; signal processing; statistical analysis; alarm probability; cognitive radios; log-likelihood ratio; signal sensing strategy; Bandwidth; Cognitive radio; Frequency; Hydrogen; Signal detection; Signal to noise ratio; Standards development; TV; Testing; Timing; Cognitive Radio; IEEE 802.22; Log-Likelihood Ratio; Soft Output; Spectrum Sensing;
Conference_Titel :
Applied Sciences in Biomedical and Communication Technologies, 2009. ISABEL 2009. 2nd International Symposium on
Conference_Location :
Bratislava
Print_ISBN :
978-1-4244-4640-7
Electronic_ISBN :
978-1-4244-4641-4
DOI :
10.1109/ISABEL.2009.5373691
