Performance Analysis of Cooperative Spectrum Sensing under Constrained Scheme
In cognitive radio networks, cooperative spectruM sensing is employed to detect the presence of primary user quickly. In this paper, we study the improvement on sensing performance for a cognitive user U1 by allowing another cognitive radio user U2 to act as its relay, when there is transmit power constraint for the relay U2.We first propose a novel numerical model for sensing performance analysis, the feasibility of our model is well explained and supported by extensive simulations. We then discuss impacts of different parameters on the improvement of sensing performance. We find that the value of α2/α1 impacts the improvement on sensing performance significantly (α2 and α1 are, respectively, the path loss exponent in the channel from a cognitive user to another cognitive user and the path loss exponent in the channel from the primary user to a cognitive user). Additionally, it is difficult for U1 to achieve the improvement on sensing performance if transmission power of cognitive users is much smaller than that of primary user.
cognitive radio cooperative realy cooperative sensing
Yunxue Liu Dongfeng Yuan Mingyan Jiang Hui Yu Chunyuan Xu Riwei Sun
School of Information Science and Engineering, Shandong University Jinan, 250100, P. R. Chia School School of Information Science and Engineering, Shandong University Jinan,250100, P. R. Chia School of Information Science and Engineering, Shandong University Jinan, 250100, P. R. Chia Yantai Vocational College Yantai, 264000, P. R. China School of Science and Technology for Opto-electronic Information, Yantai University Yantai,264005, P
国际会议
The International Conference on Communication Software and Networks(2009 IEEE通信软件与网络国际会议 ICCSN 2009)
成都
英文
737-741
2009-02-20（万方平台首次上网日期，不代表论文的发表时间）