Title :
Cooperative sensing with adaptive sensing ranges in cognitive radio ad-hoc networks
Author :
Shim, Jongwon ; Cheng, Qi ; Sarangan, Venkatesh
Author_Institution :
Dept. of Comput. Sci., Oklahoma State Univ., Stillwater, OK, USA
Abstract :
Cognitive radio has been proposed as an innovative and effective technology to exploit the efficient reuse of the precious radio spectrum. In spectrum sensing which is a crucial step in cognitive radio networks, an adequate sensing range needs to be defined to avoid the hidden transmitter/receiver problems. Moreover, a secondary user may have unreliable detection of the existent primary users due to multipath fading and/or shadowing. To solve these issues, we propose a cooperative spectrum sensing scheme with adaptive sensing ranges, especially for the hidden receiver problem. We explain the idea of using the adaptive sensing range at a secondary user transmitter and show with the simulation results that cooperative spectrum sensing with adaptive sensing ranges achieves a higher detection accuracy than that with a fixed sensing range.
Keywords :
access protocols; cognitive radio; multipath channels; radio spectrum management; wireless mesh networks; wireless sensor networks; adaptive sensing ranges; cognitive radio ad-hoc networks; cooperative sensing; multipath fading; radio spectrum; secondary user transmitter; shadowing; Ad hoc networks; Chromium; Cognitive radio; Interference; Radio transmitters; Receivers; Sensors;
Conference_Titel :
Cognitive Radio Oriented Wireless Networks & Communications (CROWNCOM), 2010 Proceedings of the Fifth International Conference on
Conference_Location :
Cannes
Print_ISBN :
978-1-4244-5885-1
Electronic_ISBN :
978-1-4244-5886-8