KFU. Card publication. Experimental Study of Channel Frequency-Correlation in an Indoor Multipath Environment for Wireless Key Generation

KAZAN
FEDERAL UNIVERSITY

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EXPERIMENTAL STUDY OF CHANNEL FREQUENCY-CORRELATION IN AN INDOOR MULTIPATH ENVIRONMENT FOR WIRELESS KEY GENERATION

Form of presentation

Articles in international journals and collections

Year of publication

2021

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Authors, employees of KFU

Galiev Aydar Akhatovich, author

Karpov Arkadiy Vasilevich, author

Sulimov Amir Ildarovich, author

Bibliographic description in the original language

Galiev A.A, Sulimov A.I, Karpov A.V., Experimental Study of Channel Frequency-Correlation in an Indoor Multipath Environment for Wireless Key Generation // Proceedings of the 2021 International Conference Engineering and Telecommunication (En&T). - 2021. - pp. 1-5. DOI: 10.1109/EnT50460.2021.9681779

Annotation

Channel randomness in wireless communication systems can be employed for generating two copies of a key bits sequence in a given pair of nodes. Among others, the differential phase method that uses phase samples of two coherent frequency tones for generating high-entropy key bits sequence seems to be a promising technique. Unfortunately, implementation of the differential phase method relies on correct specification of the frequency separation of the probing tones, which requires additional study of the frequency-correlation properties of the propagation medium. This paper is devoted to experimental study of the channel frequency-correlation properties in a typical indoor environment. Frequency autocorrelation functions are experimentally determined for the signal envelope and carrier phase on four different indoor radio links. The estimates of the channel coherence bandwidth and multipath delay spread are performed, and the influence of the line-of-sight component (LOS) is considered. Our experiments showed that, depending on the LOS intensity, the coherence bandwidth on typical indoor radio links of 20-meters length varies from 8 MHz to 25 MHz (for the correlation level of 0.2), whereas for samples of the carrier phase, the coherence bandwidth is somewhat narrower and varies from 6 MHz to 19 MHz.

Keywords

Multipath propagation, indoor radio communication, channel estimation, frequency correlation, coherence bandwidth, multipath delay spread, differential phase

The name of the journal

Proceedings of the 2021 International Conference Engineering and Telecommunication (En&T)

URL

https://ieeexplore.ieee.org/document/9681779

Please use this ID to quote from or refer to the card

https://repository.kpfu.ru/eng/?p_id=264725&p_lang=2

Full metadata record

Field DC	Value	Language
dc.contributor.author	Galiev Aydar Akhatovich	ru_RU
dc.contributor.author	Karpov Arkadiy Vasilevich	ru_RU
dc.contributor.author	Sulimov Amir Ildarovich	ru_RU
dc.date.accessioned	2021-01-01T00:00:00Z	ru_RU
dc.date.available	2021-01-01T00:00:00Z	ru_RU
dc.date.issued	2021	ru_RU
dc.identifier.citation	Galiev A.A, Sulimov A.I, Karpov A.V., Experimental Study of Channel Frequency-Correlation in an Indoor Multipath Environment for Wireless Key Generation // Proceedings of the 2021 International Conference Engineering and Telecommunication (En&T). - 2021. - pp. 1-5. DOI: 10.1109/EnT50460.2021.9681779	ru_RU
dc.identifier.uri	https://repository.kpfu.ru/eng/?p_id=264725&p_lang=2	ru_RU
dc.description.abstract	Proceedings of the 2021 International Conference Engineering and Telecommunication (En&T)	ru_RU
dc.description.abstract	Channel randomness in wireless communication systems can be employed for generating two copies of a key bits sequence in a given pair of nodes. Among others, the differential phase method that uses phase samples of two coherent frequency tones for generating high-entropy key bits sequence seems to be a promising technique. Unfortunately, implementation of the differential phase method relies on correct specification of the frequency separation of the probing tones, which requires additional study of the frequency-correlation properties of the propagation medium. This paper is devoted to experimental study of the channel frequency-correlation properties in a typical indoor environment. Frequency autocorrelation functions are experimentally determined for the signal envelope and carrier phase on four different indoor radio links. The estimates of the channel coherence bandwidth and multipath delay spread are performed, and the influence of the line-of-sight component (LOS) is considered. Our experiments showed that, depending on the LOS intensity, the coherence bandwidth on typical indoor radio links of 20-meters length varies from 8 MHz to 25 MHz (for the correlation level of 0.2), whereas for samples of the carrier phase, the coherence bandwidth is somewhat narrower and varies from 6 MHz to 19 MHz.	ru_RU
dc.language.iso	ru	ru_RU
dc.subject	Multipath propagation	ru_RU
dc.subject	indoor radio communication	ru_RU
dc.subject	channel estimation	ru_RU
dc.subject	frequency correlation	ru_RU
dc.subject	coherence bandwidth	ru_RU
dc.subject	multipath delay spread	ru_RU
dc.subject	differential phase	ru_RU
dc.title	Experimental Study of Channel Frequency-Correlation in an Indoor Multipath Environment for Wireless Key Generation	ru_RU
dc.type	Articles in international journals and collections	ru_RU