Relay-assisted cross-channel gain estimation for spectrum sharing

Zhao, G. , Huang, B., Li, L. and Zhou, X. (2016) Relay-assisted cross-channel gain estimation for spectrum sharing. IEEE Transactions on Communications, 64(3), pp. 973-986. (doi: 10.1109/TCOMM.2016.2517160)

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In cognitive radio networks, the cross-channel gain from a cognitive transmitter (CT) to a primary receiver (PR) is critical for spectrum sharing and obtaining the cross-channel gain is very difficult. Even though proactive estimation allows the CT to autonomously estimate the cross-channel gain, it may cause severe interference to the PR. This raises a new issue for spectrum sensing, called spectrum sensing interference. In this paper, we deal with the sensing interference and propose a relay-assisted method to conduct the proactive estimation, which obtains the cross-channel gain with much less interference to the PR. In our method, we let the CT act as a full-duplex amplify-and-forward relay to probe the close-loop power control between primary transceivers. By measuring the power adjustment of the primary signal, the CT estimates the cross-channel gain. Simulation results indicate that our method can reduce the sensing interference to an extremely low level.

Item Type:Articles
Glasgow Author(s) Enlighten ID:Zhao, Dr Guodong and Li, Dr Emma
Authors: Zhao, G., Huang, B., Li, L., and Zhou, X.
College/School:College of Science and Engineering > School of Engineering
College of Science and Engineering > School of Engineering > Systems Power and Energy
Journal Name:IEEE Transactions on Communications
ISSN (Online):1558-0857
Published Online:12 January 2016

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