Imperfect full duplex spectrum sensing in cognitive radio networks

Authors:
Wenchi Cheng;Xi Zhang;Hailin Zhang
Affiliations:
Texas A&M University & Xidian University, College Station, TX, USA;Texas A&M University, College Station, TX, USA;Xidian University, Xi'an, China
Venue:
CoRoNet '11 Proceedings of the 3rd ACM workshop on Cognitive radio networks
Year:
2011

Citing 4
Cited 1

Zigzag decoding: combating hidden terminals in wireless networks

Proceedings of the ACM SIGCOMM 2008 conference on Data communication
Achieving single channel, full duplex wireless communication

Proceedings of the sixteenth annual international conference on Mobile computing and networking
Sensing-Throughput Tradeoff for Cognitive Radio Networks

IEEE Transactions on Wireless Communications
Cross-Layer Based Opportunistic MAC Protocols for QoS Provisionings Over Cognitive Radio Wireless Networks

IEEE Journal on Selected Areas in Communications

Reconnection Analysis for a Cognitive Radio Network with Unreliable Sensing

Wireless Personal Communications: An International Journal

Quantified Score

Hi-index	0.00

Visualization

Abstract

Time-slotted, which means that primary users only change their status (active or not active) at the start of each secondary frame, has been considered as a common assumption in cognitive radio networks (CRNs). However, in realistic cases, primary users are non-time-slotted, which means primary users can be active or not active at any time during the whole secondary frame duration. In not-time-slotted CRNs, it is difficult to obtain good performance by using the traditional half duplex spectrum sensing scheme. In this paper, we propose a novel full duplex spectrum sensing scheme for non-time-slotted CRNs. We derive the probability of detection and the probability of false alarm with random arrival/departure of primary users' traffic and develop a continuous time Markov chain model for non-time-slotted CRNs. We analyze the effect of bandwidth, antennas placement error, and transmit signal amplitude difference on the performance of non-time-slotted CRNs. Numerical results show that the bandwidth, which is the most unavoidable imperfect factor, has little impact on performance of non-time-slotted CRNs. Therefore, the full duplex spectrum sensing scheme can be effectively used in wideband CRNs.