Title :
Cooperative spectrum sensing for cognitive radio with multiple secondary users
Author_Institution :
Sch. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA
Abstract :
Spectrum sensing is a key component in cognitive radio networks, where secondary users are able to use the frequency bands when they sense that no primary users are using those bands. In this paper, we investigate an energy detector scheme used to deal with the issues related to spectrum sensing and interference avoidance for multinode cognitive radio networks. Then, an extensive analysis on cooperative diversity, which uses randomized space time codes (RSTC) over asynchronous dispersive channels, is discussed. Numerical results are provided in order to demonstrate the effectiveness of the proposed energy detector and randomization schemes.
Keywords :
cognitive radio; interference suppression; radio spectrum management; space-time codes; asynchronous dispersive channels; cognitive radio networks; cooperative diversity; cooperative spectrum sensing; energy detector; energy detector scheme; frequency bands; interference avoidance; randomized space time codes; Cognitive radio; Detectors; Frequency; Interference; Matched filters; OFDM; Radio transmitters; Signal analysis; Space time codes; Wireless networks; Cooperative diversity; Cooperative spectrum sensing; Multinode wireless networks; Randomized space time code;
Conference_Titel :
Radio and Wireless Symposium (RWS), 2010 IEEE
Conference_Location :
New Orleans, LA
Print_ISBN :
978-1-4244-4725-1
Electronic_ISBN :
978-1-4244-4726-8
DOI :
10.1109/RWS.2010.5434108
