How much time is needed for wideband spectrum sensing?

Authors:
Yiyang Pei;Ying-Chang Liang;Kah Chan Teh;Kwok Hung Li
Affiliations:
School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore;Institute for Infocomm Research, Connexis, Singapore;School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore;School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore
Venue:
IEEE Transactions on Wireless Communications
Year:
2009

Citing 6
Cited 6

Elements of information theory

Elements of information theory
Optimal multiband joint detection for spectrum sensing in cognitive radio networks

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Optimal power allocation for fading channels in cognitive radio networks: ergodic capacity and outage capacity

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Opportunistic spectrum access for energy-constrained cognitive radios

IEEE Transactions on Wireless Communications
Sensing-Throughput Tradeoff for Cognitive Radio Networks

IEEE Transactions on Wireless Communications
Cognitive radio: brain-empowered wireless communications

IEEE Journal on Selected Areas in Communications

A review on spectrum sensing for cognitive radio: challenges and solutions

EURASIP Journal on Advances in Signal Processing - Special issue on advanced signal processing for cognitive radio networks
Cooperative spectrum sensing in cognitive radio networks with weighted decision fusion schemes

IEEE Transactions on Wireless Communications
Cross-layer optimal spectrum sensing duration and scheduling in cognitive networks

CoRoNet '11 Proceedings of the 3rd ACM workshop on Cognitive radio networks
Power and Time Allocation Between Multiple Channels in Cognitive Radio Networks

Wireless Personal Communications: An International Journal
Spatial Spectrum Reuse for Opportunistic Spectrum Access in Infrastructure-Based Systems

Wireless Personal Communications: An International Journal
An efficient hybrid spectrum access algorithm in OFDM-based wideband cognitive radio networks

Neurocomputing

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Abstract

In this paper, we consider a wideband cognitive radio network (CRN) which can simultaneously sense multiple narrowband channels and thus aggregate the perceived available channels for transmission. We study the problem of designing the optimal spectrum sensing time and power allocation schemes so as to maximize the average achievable throughput of the CRN subject to the constraints of probability of detection and the total transmit power. The optimal sensing time and power allocation strategies are developed under two different total power constraints, namely, instantaneous power constraint and average power constraint. Finally, numerical results show that, under both cases, for a CRN with three 6MHz channels, if the frame duration is 100ms and the target probability of detection is 90% for the worst case signal-to-noise ratio of primary users being -12dB, -15dB and -20dB, respectively, the optimal sensing time is around 6ms and it is almost insensitive to the total transmit power.