Title :
Agilize Spectrum Sensing for Cognitive Radios
Author :
Qun Pan ; Xin Zhang ; Qiu Yue ; Tao Lin ; Dacheng Yang
Author_Institution :
Wireless Theor. & Technol. Lab., Beijing Univ. of Posts & Telecommun., Beijing
Abstract :
In cognitive radio (CR) networks, cognitive users need to continuously monitor spectrum to detect the presence of primary users, yet attain a reasonable throughput. In this paper, we exploit a scheme to detect the primary transmitting signal as quickly as possible using energy detection, besides a necessary transmission rate of CR networks is sustained. Also the relationship between time and frequency sensitivity in spectrum detection is given, whose product is a function of effective receive signal to noise ratio (SNR) of CR user.
Keywords :
cognitive radio; signal detection; agilize spectrum sensing; cognitive radio networks; cognitive users; energy detection; frequency sensitivity; signal to noise ratio; spectrum detection; transmitting signal detection; AWGN; Additive white noise; Bandwidth; Chromium; Cognitive radio; FCC; Frequency; Radio spectrum management; Signal to noise ratio; Throughput;
Conference_Titel :
Wireless Communications, Networking and Mobile Computing, 2008. WiCOM '08. 4th International Conference on
Conference_Location :
Dalian
Print_ISBN :
978-1-4244-2107-7
Electronic_ISBN :
978-1-4244-2108-4
DOI :
10.1109/WiCom.2008.288
