Title :
Secret key extraction based on uplink CFR estimation for OFDM-FDD system
Author :
Xiaohua Wu ; Chunjing Hu ; Yuexing Peng ; Hui Zhao ; Hongtao Duan
Author_Institution :
Beijing Univ. of Posts & Telecommun., Beijing, China
Abstract :
Channel reciprocity is limited in frequency division duplex (FDD) system, and thus those channel reciprocity-based secret key extraction methods which are widely adopted in time division duplex (TDD) systems can hardly be implemented in FDD systems. In this paper, a novel secret key extraction method in OFDM-FDD system is proposed to achieve physical-layer security, by which the channel frequency response (CFR) in the uplink at the same time is estimated by the communication pair with the aid of a specially designed forwarding strategy based on confidential probing signal, and then the secret key is extracted from the CFR estimates. The effectiveness of the proposed method is verified by numerical simulations.
Keywords :
OFDM modulation; channel estimation; frequency division multiplexing; frequency estimation; frequency response; telecommunication security; time division multiplexing; OFDM-FDD system; channel frequency response; channel reciprocity; confidential probing signal; forwarding strategy; frequency division duplex; numerical simulation; physical layer security; secret key extraction mehtod; time division duplex; uplink CFR estimation; Channel estimation; Estimation; OFDM; Security; Uplink; Vehicles; Wireless communication; FDD system; Physical-layer security; channel frequency response; secret key extraction;
Conference_Titel :
Communication Technology (ICCT), 2013 15th IEEE International Conference on
Conference_Location :
Guilin
DOI :
10.1109/ICCT.2013.6820347
