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Analysis of Key Generation Rate from Wireless Channel in In-Band Full-Duplex Communications

Sadeghi, Alireza and Zorzi, Michele and Lahouti, Farshad (2016) Analysis of Key Generation Rate from Wireless Channel in In-Band Full-Duplex Communications. In: 2016 IEEE International Conference on Communications Workshops (ICC). IEEE , Piscataway, NJ, pp. 104-109. ISBN 978-1-5090-0448-5.

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In this paper, the impact of in-band full-duplex (IBFD) wireless communications on secret key generation via physical layer channel state information is investigated. A key generation strategy for IBFD wireless devices to increase the rate of generated secret keys over multipath fading channels is proposed. Conventionally, due to the half-duplex (HD) constraint on wireless transmissions, sensing simultaneous reciprocal channel measurements is not possible, which leads to a degraded key generation rate. However, with the advent of IBFD wireless devices, the legitimate nodes can sense the shared wireless link simultaneously at the possible cost of a self-interference (SI) channel estimation and some residual self-interference (RSI). As we demonstrate, with HD correlated observations the key rate is upper bounded by a constant, while with IBFD the key rate is only limited by the SI cancellation performance and is in general greater than that of its HD counterpart. Our analysis shows that with reasonable levels of SI cancellation, in the high SNR regime the key rate of IBFD is much higher, while in low SNRs, the HD system performs better. Finally, the key rate loss due to the overhead imposed by the SI channel estimation phase is discussed.

Item Type:Book Section
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URLURL TypeDescription Paper
Zorzi, Michele0000-0003-2870-4678
Lahouti, Farshad0000-0002-8729-873X
Additional Information:© 2016 IEEE. Date Added to IEEE Xplore: 07 July 2016.
Record Number:CaltechAUTHORS:20161117-085510422
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Official Citation:A. Sadeghi, M. Zorzi and F. Lahouti, "Analysis of key generation rate from wireless channel in in-band full-duplex communications," 2016 IEEE International Conference on Communications Workshops (ICC), Kuala Lumpur, 2016, pp. 104-109. doi: 10.1109/ICCW.2016.7503772
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:72101
Deposited By: Ruth Sustaita
Deposited On:17 Nov 2016 17:30
Last Modified:11 Nov 2021 04:56

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