Cooperative Spectrum Sensing with Optimal Sensing Ranges in Cognitive Radio Ad-Hoc Networks
نویسندگان
چکیده
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 prevent the hidden transmitter/receiver problems. Moreover, a secondary user may have unreliable detection of the existent primary users due to channel fading and/or shadowing. To overcome these problems, cooperative spectrum sensing may be adopted. In this paper, we propose a cooperative spectrum sensing scheme with adaptive sensing ranges in cognitive radio ad-hoc networks. We explain the adaptive sensing range of a local secondary user transmitter and analytically show that cooperative spectrum sensing with adaptive sensing ranges is better than that with a fixed sensing range.
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