Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

International Conference on Wireless Communications and Signal Processing (WCSP)

A unified mathematical model for spatial scrambling based secure wireless transmission and its wiretap method

Feilong Wu, Wenjie Wang, Hui‐Ming Wang, Qinye Yin

Published Nov 1, 2011• 6 citations
Publisher

Abstract

The spatial scrambling based secure wireless transmission methods, such as artificial noise and antenna array weighted randomly, can secure wireless transmission at the physical layer. They have a common physical essence, that is, the private message is transmitted in the desired direction while deliberate interference is transmitted in other orthogonal directions. Unfortunately, the interference is not white in spatial domain due to the limitation of the transmit antenna number. A eavesdropper can eliminate the directional interferences by the aid of multiple antennas. In this paper, a unified mathematical model for the above physical-layer methods is established, based on which, a MUSIC-like wiretap algorithm is proposed by exploiting the finite alphabet property of communication symbols. Simulation results show that if the eavesdropper has more antennas than that of the transmitter, the proposed algorithm can intercept information effectively.

DOI
10.1109/wcsp.2011.6096860

Related papers

Artificial noise aided secure communication and its eavesdropping method

Yang Pen

The broadcast nature of wireless network leads to significant challenges to its information security. Recently,artificial noise(AN) is proposed to be injected into the wiretap channel to interfere the eavesdropper for secret communication at the physical-layer. In this paper,we investigate the necessary condition for this AN-aided scheme to ensure communication security,and further propose an effective wiretap algorithm to counteract such a security scheme. When the eavesdropper equips more antennas than the transmitter,it is able to cancel artificial interference and extract the secret information by complex-valued independent component analysis(ICA). Numerical simulation results verify that our proposed algorithm can defeat the AN-aided security scheme and implement eavesdropping effectively.

Journal of Chongqing University of Posts and Telecommunications•Jan 1, 2014•0 citations

A Space Hopping Secure Transmission Method with Masked Characteristic of Finite Alphabets

Bo Cui

Addressing the wireless digital communication system,a sufficient condition to ensure the physical-layer security transmission is derived from the viewpoint of information theory,and a space hopping secure transmission method is proposed,which can mask the characteristic of finite alphabets. First,since the multi-antenna eavesdropper in the finite-alphabetinput system possesses the architecture of Discrete Noisy Lossless Channel( DNLC),it can reconstruct the secret signal and invalidate the artificial noise method. As a result,destroying the eavesdropper's DNLC architecture becomes a sufficient condition for ensuring the security of system transmission. Then,utilizing the diversity and uniqueness of wireless channel characteristics,a space hopping secure transmission method based on the Multiple Input Multiple Output( MIMO) system is proposed.It switches receiver / transmitter antennas and transmits spatial scrambling during the information transmission,which can mask the finite alphabet characteristic of the secret signal and destroy the eavesdropper's DNLC architecture. Finally,theoretical analysis and simulation results demonstrate the efficacy of the secure method.

Dianzi xuebao•Jan 1, 2015•0 citations

Effective eavesdropping in the Artificial noise aided security scheme

Feilong Wu, Wenjie Wang, Bobin Yao +1 more

The Artificial noise (AN) injection scheme is recently proposed to secure wireless transmissions. By simultaneously transmitting data symbols and artificial interference, it prevents the eavesdropper from decoding the secret message intended for the legitimate receiver. In this paper, we mainly focus on weakness of the AN security scheme. First, we analyze the necessary condition for such a scheme to guarantee that the legitimate transmitter-receiver pair can achieve a positive secrecy communication rate. And then, we further propose an effective eavesdropping strategy to counteract such a security scheme once the condition does not hold up in some wireless systems. Our proposed wiretap method involves complex-valued independent component analysis (ICA) and requires the antenna number of the eavesdropper's is larger or equal to that of the transmitter's. Simulation results demonstrate the effectiveness of this wiretap method.

IEEE/CIC International Conference on Communications in China (ICCC)•Aug 1, 2013•8 citations

Physical-layer security based on joint scrambling with spatial and frequency resource

Mingliang Li, Kaizhi Huang, Zhong Zhou

The projection of the random multi-antenna weighted vector structured with spatial scrambling is of constant modulus on the main channel, Eavesdropper can take the advantage of multi-antenna to intercept private information. To solve this problem, we design a kind of physical-layer secrecy method based on the joint scrambling with spatial and frequency resource. Based on the parallel transmission nature of OFDM, we construct a random multiple antenna weighted vector in the each subcarrier, the projection of which on the main channel is equal to a dynamic reference variable. The legitimate user can correctly demodulate the receive signal by this reference variable obtained from the estimation of the reference subcarrier. Meanwhile, because of the difference between the main channel and eavesdropper channel, eavesdropper can't obtain the useful information. The simulation results show that, when the legitimate users can correctly demodulate the received signal, the eavesdropper can't intercept the private information using whether blind equalization or MUSIC-like method.

IEEE International Conference on Information Science and Technology (ICIST)•Mar 1, 2013•0 citations

Physical-layer security transmission method based on spatial modulation with finite alphabet inputs

Bo Cui

Addressing the problem of wireless physical layer security transmission for finite alphabet input systems,a spatial modulation secure transmission method is proposed.On the basis of information theory,the method utilizes the receive antenna indices of multiple-input multiple-output (MIMO) system to bear information,and randomizes the eavesdropper’s equivalent channel by switching the receive antennas,which can guarantee physical layer security transmission.First,the different receiving performances of the legitimate user and eavesdropper are analyzed in the spatial modulation secure transmission system.Second,the mutual information and secrecy mutual information of the transmission system are calculated,and two sufficient conditions that ensure positive secrecy mutual information are pointed out.Finally,an estimation algorithm of mutual information is provided.Moreover,the symmetry of finite alphabet set is exploited to decrease the computational complexity.Theoretical analysis and numerical simulation results verify the availability of the security transmission method.

Journal of Communications•Jan 1, 2015•0 citations

Information-guided randomization for wireless physical layer secure transmission

Qiao-long Li

Security capacity improvement is always the implementation goal of physical layer security, which can be achieved by deliberate randomization based on differentia and uniqueness of wireless channels through signal processing method. An information-guided randomization secure transmission scheme is proposed combined with a spatial modulation system in which information can be carried by receiving antennas index but actually by channel differentia. Randomization is generated along with channel modulation procedure realized by corresponding preprocessing to transmitting signals. We provide three approaches for designing preprocessing weights under different constraint conditions. The former two can only be used when the number of receiving antennas is less than transmitting and have a tradeoff with varying degrees between receiving performance and security. The third one then relaxes the limits via generalized spatial modulation and can be used for arbitrary antennas configuration but with a receiving performance compromise. Lastly, results of performance analysis and numerical evaluation show that the proposed secure scheme is effective to prohibit the eavesdropper from intercepting information.

IEEE Military Communications Conference (MILCOM)•Oct 1, 2012•7 citations
The spatial scrambling based secure wireless transmission methods, such as artificial noise and antenna array weighted randomly, can secure wireless transmission at the physical layer. They have a common physical essence, that is, the private message is transmitted in the desired direction while deliberate interference is transmitted in other orthogonal directions. Unfortunately, the interference is not white in spatial domain due to the limitation of the transmit antenna number. A eavesdropper can eliminate the directional interferences by the aid of multiple antennas. In this paper, a unified mathematical model for the above physical-layer methods is established, based on which, a MUSIC-like wiretap algorithm is proposed by exploiting the finite alphabet property of communication symbols. Simulation results show that if the eavesdropper has more antennas than that of the transmitter, the proposed algorithm can intercept information effectively.
The broadcast nature of wireless network leads to significant challenges to its information security. Recently,artificial noise(AN) is proposed to be injected into the wiretap channel to interfere the eavesdropper for secret communication at the physical-layer. In this paper,we investigate the necessary condition for this AN-aided scheme to ensure communication security,and further propose an effective wiretap algorithm to counteract such a security scheme. When the eavesdropper equips more antennas than the transmitter,it is able to cancel artificial interference and extract the secret information by complex-valued independent component analysis(ICA). Numerical simulation results verify that our proposed algorithm can defeat the AN-aided security scheme and implement eavesdropping effectively.
Addressing the wireless digital communication system,a sufficient condition to ensure the physical-layer security transmission is derived from the viewpoint of information theory,and a space hopping secure transmission method is proposed,which can mask the characteristic of finite alphabets. First,since the multi-antenna eavesdropper in the finite-alphabetinput system possesses the architecture of Discrete Noisy Lossless Channel( DNLC),it can reconstruct the secret signal and invalidate the artificial noise method. As a result,destroying the eavesdropper's DNLC architecture becomes a sufficient condition for ensuring the security of system transmission. Then,utilizing the diversity and uniqueness of wireless channel characteristics,a space hopping secure transmission method based on the Multiple Input Multiple Output( MIMO) system is proposed.It switches receiver / transmitter antennas and transmits spatial scrambling during the information transmission,which can mask the finite alphabet characteristic of the secret signal and destroy the eavesdropper's DNLC architecture. Finally,theoretical analysis and simulation results demonstrate the efficacy of the secure method.
The Artificial noise (AN) injection scheme is recently proposed to secure wireless transmissions. By simultaneously transmitting data symbols and artificial interference, it prevents the eavesdropper from decoding the secret message intended for the legitimate receiver. In this paper, we mainly focus on weakness of the AN security scheme. First, we analyze the necessary condition for such a scheme to guarantee that the legitimate transmitter-receiver pair can achieve a positive secrecy communication rate. And then, we further propose an effective eavesdropping strategy to counteract such a security scheme once the condition does not hold up in some wireless systems. Our proposed wiretap method involves complex-valued independent component analysis (ICA) and requires the antenna number of the eavesdropper's is larger or equal to that of the transmitter's. Simulation results demonstrate the effectiveness of this wiretap method.
The projection of the random multi-antenna weighted vector structured with spatial scrambling is of constant modulus on the main channel, Eavesdropper can take the advantage of multi-antenna to intercept private information. To solve this problem, we design a kind of physical-layer secrecy method based on the joint scrambling with spatial and frequency resource. Based on the parallel transmission nature of OFDM, we construct a random multiple antenna weighted vector in the each subcarrier, the projection of which on the main channel is equal to a dynamic reference variable. The legitimate user can correctly demodulate the receive signal by this reference variable obtained from the estimation of the reference subcarrier. Meanwhile, because of the difference between the main channel and eavesdropper channel, eavesdropper can't obtain the useful information. The simulation results show that, when the legitimate users can correctly demodulate the received signal, the eavesdropper can't intercept the private information using whether blind equalization or MUSIC-like method.
Addressing the problem of wireless physical layer security transmission for finite alphabet input systems,a spatial modulation secure transmission method is proposed.On the basis of information theory,the method utilizes the receive antenna indices of multiple-input multiple-output (MIMO) system to bear information,and randomizes the eavesdropper’s equivalent channel by switching the receive antennas,which can guarantee physical layer security transmission.First,the different receiving performances of the legitimate user and eavesdropper are analyzed in the spatial modulation secure transmission system.Second,the mutual information and secrecy mutual information of the transmission system are calculated,and two sufficient conditions that ensure positive secrecy mutual information are pointed out.Finally,an estimation algorithm of mutual information is provided.Moreover,the symmetry of finite alphabet set is exploited to decrease the computational complexity.Theoretical analysis and numerical simulation results verify the availability of the security transmission method.
Security capacity improvement is always the implementation goal of physical layer security, which can be achieved by deliberate randomization based on differentia and uniqueness of wireless channels through signal processing method. An information-guided randomization secure transmission scheme is proposed combined with a spatial modulation system in which information can be carried by receiving antennas index but actually by channel differentia. Randomization is generated along with channel modulation procedure realized by corresponding preprocessing to transmitting signals. We provide three approaches for designing preprocessing weights under different constraint conditions. The former two can only be used when the number of receiving antennas is less than transmitting and have a tradeoff with varying degrees between receiving performance and security. The third one then relaxes the limits via generalized spatial modulation and can be used for arbitrary antennas configuration but with a receiving performance compromise. Lastly, results of performance analysis and numerical evaluation show that the proposed secure scheme is effective to prohibit the eavesdropper from intercepting information.