Physical layer security performance analysis of the time reversal transmission system

Lei, Weijia; Yang, Miaomiao; Li, Yao; Lei, Hongjiang

doi:10.1049/iet-com.2019.0872

Cited by 7 publications

(6 citation statements)

References 27 publications

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“…In [33], a symbol waveform optimization technique in time-domain (TD) is proposed to reach a desired SINR at Bob with AN injection, under power constraint, when eavesdropper's CSI is not known. Another approach to increase the SINR in SISO systems is time reversal (TR) pre-filtering, [34]. This has the advantage to be implemented with a simple precoder at the transmitter.…”

Section: B State Of the Artmentioning

confidence: 99%

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Physical Layer Security in an OFDM Time Reversal SISO Communication With Imperfect Channel State Information

et al. 2022

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A frequency domain time-reversal (TR) precoder is proposed to perform physical layer security in single-input single-output (SISO) systems using orthogonal frequency-division multiplexing (OFDM) and artificial noise (AN) injection. This scheme guarantees the secrecy of a communication towards a legitimate user, Bob, by exploiting the frequency diversity selective behaviour in multipath channels. The transmitter, Alice, has imperfect channel state information (CSI) of the legitimate link thanks to the channel reciprocity in time division duplex systems and does not know the instantaneous CSI of a potential eavesdropper, Eve. Three optimal decoding structures at Eve are considered in a block fading environment depending on the handshake procedure between Alice and Bob. Closed-form approximations of the signal-to-noise ratio required at Bob and the maximal CSI error that can be made at Alice, in order to guarantee a communication ergodic secrecy rate (ESR), are derived. Furthermore, the optimal amount of AN energy to inject, considering imperfect CSI, is also given as a closed-form expression. A trade-off on the choice of the spreading factor of the TR precoder is established between maximizing the ESR and decreasing the −achievable secrecy rate. Finally, thanks to these results, Alice can be a priori aware of the ESR over which she can establish a secure communication.INDEX TERMS Artificial noise, block-fading, eavesdropper, ergodic secrecy rate, physical layer security, −achievable secrecy rate , SISO-OFDM, time division duplex , time-reversal.

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Section: B State Of the Artmentioning

confidence: 99%

“…TR is achieved by up/downsampling the signal in the TD. While the impact of the back-off rate (BOR), defined as the up/downsampling rate [43], was studied in [8], [34], limited non-optimal decoding capabilities were attributed to Eve, which led to too optimistic secrecy performance.…”

Section: B State Of the Artmentioning

confidence: 99%

Physical Layer Security in an OFDM Time Reversal SISO Communication With Imperfect Channel State Information

et al. 2022

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“…The left part of Fig. 6 illustrates the values of 𝛼 opt given by ( 36), (38), and (40) that maximize the ergodic SR determined from the closed-form approximations (35), (37), and (39), as well as obtained from the numerical simulations, as a function of the BOR. There is a slight discrepency between the analytical estimations of the optimal amount of data energy to inject using (36), (38), and (40), and its numerical estimation.…”

Section: A Model Performancesmentioning

confidence: 99%

“…This has the advantage to be implemented with a simple precoder at the transmitter. TR achieves a focusing gain at the intended receiver position only, thereby naturally offering intrinsic antieavesdropping capabilities, [35], [43]. TR is achieved by up/downsampling the signal in the TD.…”

Section: Introductionmentioning

confidence: 99%

“…TR is achieved by up/downsampling the signal in the TD. While the impact of the back-off rate (BOR), defined as the up/downsampling rate [44], was studied in [9], [35], limited non-optimal decoding capabilities were attributed to Eve. Another approach to provide security at the physical layer is the use of orthogonal frequency-division multiplexing (OFDM) scheme which can be implemented in time or frequency domain (FD).…”

Section: Introductionmentioning

confidence: 99%

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Physical Layer Security in a SISO Communication using Frequency-Domain Time-Reversal OFDM Precoding and Artificial Noise Injection

Golstein,

Rottenberg,

Horlin

et al. 2020

Preprint

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A frequency domain (FD) time-reversal (TR) precoder is proposed to perform physical layer security (PLS) in single-input single-output (SISO) systems using orthogonal frequency-division multiplexing (OFDM) and artificial noise (AN) signal injection. The AN signal does not corrupt the data transmission to the legitimate receiver but degrades the decoding performance of the eavesdropper. This scheme guarantees the secrecy of a communication towards a legitimate user when the transmitter knows the instantaneous channel state information (CSI) of the legitimate link thanks to the channel reciprocity in time division duplex (TDD) systems, but does not know the instantaneous CSI of a potential eavesdropper. Three optimal decoding structures at the eavesdropper are considered in a fast fading (FF) environment depending on the handshake procedure between Alice and Bob. Closed-form approximations of the AN energy to inject in order to maximize the SR of the communication are derived. In addition, the required conditions at the legitimate receiver's end to guarantee a given SR are determined when Eve's signal-to-noise ratio (SNR) is infinite. Furthermore, a waterfilling power allocation strategy is presented to further enhance the secrecy of the scheme. Simulation results are presented to demonstrate the security performance of the proposed secure system.

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Optimization of pre-equalized time reversal security transmission systems assisted with artificial noise

et al. 2022

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Time reversal (TR) transmission technology can focus the power of a signal in both time and space domains and reduce signal energy leakage to unintended receivers, making it suitable for physical layer security systems. By adding a pre-equalizer to the transmitter and optimizing it, the performance of multi-antenna TR transmission system can be improved obviously with an acceptable optimization complexity. In this paper, the pre-equalizer and artificial noise (AN) are jointly optimized to enhance the security performance of pre-equalized TR (ETR) systems when eavesdropping channel state information (ECSI) is unknown or known. When ECSI is unknown, null-space AN is adopted, and the pre-equalizer is optimized to minimize the signal power under the constraint of the minimum signal-to-interference-plus-noise ratio (SINR) of the legitimate receiver. When ECSI is known, under the minimum SINR constraint of the legitimate receiver, the pre-equalizer and AN's covariance matrix are jointly optimized to minimize the SINR of the eavesdropper. The optimization problem is non-convex and is transformed into a convex problem, which can be solved using the CVX toolbox. Simulation results demonstrate that compared with TR systems, by optimizing the pre-equalizer, the security performance of ETR multi-antenna systems can be significantly improved, and the optimization complexity is acceptable.

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Physical layer security performance analysis of the time reversal transmission system

Cited by 7 publications

References 27 publications

Physical Layer Security in an OFDM Time Reversal SISO Communication With Imperfect Channel State Information

Physical Layer Security in an OFDM Time Reversal SISO Communication With Imperfect Channel State Information

Physical Layer Security in a SISO Communication using Frequency-Domain Time-Reversal OFDM Precoding and Artificial Noise Injection

Optimization of pre-equalized time reversal security transmission systems assisted with artificial noise

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