Directional Modulation Design Based on Crossed-Dipole Arrays for Two Signals With Orthogonal Polarisations

Zhang, Bo; Liu, Wei; Lan, Xiang

doi:10.1049/cp.2018.0428

Cited by 9 publications

(14 citation statements)

References 18 publications

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“…In [21][22][23][24][25][26][27][28][29][30], phased arrays are employed to show that DM can be implemented by phase shifting the transmitted antenna signals properly, and DM also enables an array to send independent data in multiple directions. The radiation pattern of an arbitrarily-spaced…”

Section: Chaptermentioning

confidence: 99%

“…In the traditional DM technique, there is only a single signal transmitted at one carrier frequency to the desired direction. To increase channel capacity in the context of one carrier frequency, in this chapter the polarisation information of the electromagnetic signal is exploited and two orthogonal polarised signals can be transmitted to the same direction at the same frequency simultaneously, as demonstrated in the recent conference publication [29]. For the electromagnetic wave the polarization is the plane in which the electric wave vibrates effectively.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, compared to the ULA design [29], to further exploit the DOFs [5,6] in the spatial domain, the orthogonally polarised design for DM is applied to sparse antenna arrays. In this chapter, the CS-based formulation is applied to the design.…”

Section: Introductionmentioning

confidence: 99%

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Antenna Array Design for Directional Modulation

Zhang

Liu

Wang

2020

Lecture Notes in Electrical Engineering

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Directional modulation (DM) as a physical layer security technique to keep known constellation points in the desired directions, while making the points scrambled in other directions has been achieved. DM is normally applied on uniform linear arrays (ULAs) where the maximum spacing between adjacent antennas is a half wavelength of the frequency of interest in order to avoid spatial aliasing. In this thesis, to have a larger aperture and a higher spatial resolution given a fixed number of antennas, compressive sensing (CS) based sparse antenna array design for DM is formulated. Two practical scenarios are considered in the proposed design: robust design with model errors, and design with practical non-zero-sized antennas. To extend the frequency spectrum, multi-carrier based phased antenna array design for DM by using Inverse Discrete Fourier Transform (IDFT) is introduced. The modified Wideband Beampattern Formation via Iterative Techniques (modified WBFIT) method is proposed to reduce the peak to average power ratio (PAPR) to a given threshold for a given antenna array geometry. Moreover, polarisation states of signals are exploited on crossed-dipole array for DM to further increase the channel capacity. Based on a multi-path model, positional modulation design is proposed to make sure that only in desired locations the received signal can be recovered successfully, while in the positions around, the received modulation patterns are scrambled.

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Section: Chaptermentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Antenna Array Design for Directional Modulation

Zhang

Liu

Wang

2020

Lecture Notes in Electrical Engineering

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“…In order to increase the secure transmission performance of a dual-polarized satellite MIMO system, a directional PM scheme using a four-element array was put forward in [33], which can be viewed as the first amalgamation of DM and PM. Recently, a combination of DM and polarization design using crossed dipole arrays was put forward in [34]. Nevertheless, the polarization information was directionless for the works mentioned above.…”

Section: Introductionmentioning

confidence: 99%

“…Inspired by the pioneering researches, especially in [22] and [34], a multi-beam DM technique using directional polarization information based on a polarization sensitive array (PSA) is proposed in this paper. The spatial domain and polarization domain are simultaneously introduced into the proposed multi-beam DM system.…”

Section: Introductionmentioning

confidence: 99%

Directional Modulation Technique Using a Polarization Sensitive Array for Physical Layer Security Enhancement

Zhang¹,

Li²,

Le³

et al. 2019

Preprint

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Directional modulation (DM), as an emerging promising physical layer security (PLS) technique at the transmitter side with the help of an antenna array, has developed rapidly over decades. In this study, a DM technique using a polarization sensitive array (PSA) to produce the modulation with different polarization states (PSs) at different directions is investigated. PSA can be employed for more effective DM for an additional degree of freedom provided in the polarization domain. The polarization information can be exploited to transmit different data streams simultaneously at the same directions, same frequency, but with fixed different PSs in the desired directions to increase the channel capacity, and with random PSs off the desired directions to enhance PLS. The proposed method has the capability of concurrently projecting independent signals into different specified spatial directions while simultaneously distorting signal constellation in all other directions. Mathematical analysis and design examples for single-beam and multi-beam DM systems are presented. Simulation results demonstrate that the proposed method is more effective for PLS and the channel capacity is significantly improved compared with conventional antenna arrays.

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Positional Modulation Design Based on Multiple Phased Antenna Arrays

Zhang

Liu

2019

IEEE Access

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Traditional directional modulation designs are normally based on a single phased array, with the assumption that eavesdroppers and desired users are in different directions. However, it is not always the case, as it is possible that they are in the same direction. As a result, signals received by eavesdroppers will be approximately the same as desired users. To solve the problem, a multiple antenna array model is introduced, and the principle of the design is that the eavesdropper located in the same direction as the desired user for one antenna array may not be in the same direction for another antenna array. Based on such a model, in this paper, a power minimization constraint for the design is proposed, and an artificial noise component is included, resulting in a scrambled phase response for eavesdroppers. Beam pattern, phase pattern, and bit error rate are used as metrics to show the effectiveness of the designs based on multiple fixed antenna arrays and location optimized antenna arrays, respectively.

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Directional Modulation Design Based on Crossed-Dipole Arrays for Two Signals With Orthogonal Polarisations

Cited by 9 publications

References 18 publications

Antenna Array Design for Directional Modulation

Antenna Array Design for Directional Modulation

Directional Modulation Technique Using a Polarization Sensitive Array for Physical Layer Security Enhancement

Positional Modulation Design Based on Multiple Phased Antenna Arrays

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