A secret key generation method based on CSI in OFDM-FDD system

Author

Xiaohua Wu ; Yuexing Peng ; Chunjing Hu ; Hui Zhao ; Lei Shu

Author_Institution

Key Lab. of Universal Wireless Commun., Beijing Univ. of Posts & Telecommun., Beijing, China

fYear

2013

fDate

9-13 Dec. 2013

Firstpage

1297

Lastpage

1302

Abstract

Channel reciprocity is an inherent feature of time division duplex (TDD) system while in frequency division duplex (FDD) system it is limited due to different frequencies being used for the uplink and the downlink. As a consequence, channel reciprocity-based secret generating methods used in TDD systems cannot be applied directly to FDD systems. In this paper, we present a novel secret key generation method for FDD system, for which the communication pair estimate the channel state information (CSI) of the same time in the uplink by a specially designed forwarding strategy and generate the secret key from the CSI estimates. Numerical simulations are implemented to verify the effectiveness of the proposed method.

Keywords

OFDM modulation; channel estimation; cryptography; telecommunication security; OFDM-FDD system; channel reciprocity; channel state information; frequency division duplex system; secret key generation method; time division duplex system; Downlink; OFDM; Physical layer; Probes; Security; Uplink; Vehicles; FDD system; Physical-layer security; channel state information; secret key generation;

fLanguage

English

Publisher

ieee

Conference_Titel

Globecom Workshops (GC Wkshps), 2013 IEEE

Conference_Location

Atlanta, GA

Type

conf

DOI

10.1109/GLOCOMW.2013.6825173

Filename

6825173