Pre-filter Design for Sum Secrecy Rate Optimization in Time-reversal Multiuser Systems

Weijia LEI; Miaomiao YANG

doi:10.11999/JEIT190339

Volume 42 Issue 5

Jun. 2020

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Article Navigation > Journal of Electronics & Information Technology > 2020 > 42(5): 1253-1260

Weijia LEI, Miaomiao YANG. Pre-filter Design for Sum Secrecy Rate Optimization in Time-reversal Multiuser Systems[J]. Journal of Electronics & Information Technology, 2020, 42(5): 1253-1260. doi: 10.11999/JEIT190339

Citation:

Weijia LEI, Miaomiao YANG. Pre-filter Design for Sum Secrecy Rate Optimization in Time-reversal Multiuser Systems[J]. Journal of Electronics & Information Technology, 2020, 42(5): 1253-1260. doi: 10.11999/JEIT190339

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Pre-filter Design for Sum Secrecy Rate Optimization in Time-reversal Multiuser Systems

doi: 10.11999/JEIT190339

Weijia LEI,
Miaomiao YANG^,

School of Communication and Information Engineering, Chongqing University of Posts and Telecommunication, Chongqing 400065, China

Funds: The National Natural Science Foundation of China (61971080,61471076), The Chongqing Research Program of Basic Research and Frontier Exploration (cstc2017jcyjAX0204, cstc2018jcyjAX0432), The Key Project of Science and Technology Research of Chongqing Education Commission (KJZD-K201800603)

Received Date: 2019-05-16
Rev Recd Date: 2019-09-26

Available Online: 2020-01-20

Publish Date: 2020-06-04

Abstract

Abstract

Utilizing the characteristics of the wireless channel to achieve secure transmission of information through physical layer technology is a way to realize security communications. The time-reversed transmission has natural anti-jamming and anti-eavesdropping capability due to its unique spatial and temporal focusing property, so a good secrecy performance can be obtained even when the transmitter is equipped with single transmitting antenna. This paper studies the optimization of the transmit filter impulse response in a two-user time-reversed downlink multiple access secure transmission system. The joint optimization problem of two transmitting filters is transformed into the independent optimization problem of each filter based on reciprocity principles. This problem is further converted into the problem of finding the largest eigenvalue and its corresponding eigenvector which is solved by iterative algorithm. The simulation results show that by optimizing the pre-filter for sum secrecy rate, the system's sum secrecy rate is promoted and is obviously higher than that of the conventional time-reversed pre-processing filter system and direct transmission system.
- Physical layer security,
- Time reversal,
- Sum secrecy rate,
- Pre-processing filter

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References(14)

References

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