Abstract:

A new cooperative spectrum sensing scheme is proposed to reduce the cooperation overhead. After comparing the local observation with the threshold, the user cou ld decide, whether or not, to transmit local decision to the base station. Two f usion rules, counting rule and NeymanPearson rule, are investigated for the pr oposed sensing scheme. Analysis and simulation show that the proposed scheme gua rantees sensing reliability without any performance loss and reduces the communi cation overhead significantly to achieve high energy efficiency in sensing cooperation.

Key words: cognitive radio network, cooperative spectrum sensing, counting rule, NeymanPearson rule