scholarly journals Secure Wireless Communications Based On Antenna Array Elements

2020 ◽  
Vol 2 (2) ◽  
pp. 18-24
Author(s):  
Shaddrack Yaw Nusenu
Keyword(s):  
Wireless Communications ◽  
Antenna Array ◽  
Physical Layer Security ◽  
Physical Layer ◽  
Modulation Scheme ◽  
Security Level ◽  
Transmission Period ◽  
Frequency Diverse Array ◽  
Point To Point ◽  
Intended Receiver

Configuration of antenna array system to offer directional dependent modulation has the capability of enhancing the security level of data transmission against eavesdroppers’ attacks. In this paper, Frequency diverse array (FDA) antenna for physical–layer security in wireless communications has been proposed. The proposed method provide a range and angle dependent directional modulation scheme using FDA with frequency increments to improve physical-layer security point-to-point communications. It maintains the objective of changing the progressive phase shifts at each symbol transmission. Thus the emitted pattern at each symbol transmission period will be range and angle dependent. Consequently, the proposed method offers a robust physical-layer security for wireless transmission, as the transmitted signal will be deliberately distorted along the undesired positions, but can be successfully decoded by the intended receiver position. Numerical results are presented to validate the effectiveness of the proposed method. Keywords: Frequency diverse array; Physical-layer security; Directional antenna modulation; Wireless communication; Range and angle dependent.

scholarly journals On the Implementation of a Dynamic Direction Modulation System with Vector Modulators

2019 ◽  
Vol 2019 ◽  
pp. 1-13 ◽  
Author(s):  
Edith Annette Cabrera-Hernández ◽  
Josep Parron ◽  
Alan Tennant
Keyword(s):  
Wireless Communications ◽  
Physical Layer Security ◽  
Physical Layer ◽  
Efficient Technique ◽  
Synthesis Methods ◽  
System Architectures ◽  
Flexible Framework ◽  
Communications System ◽  
Nonideal Behavior ◽  
Directional Modulation

Dynamic directional modulation (DDM) has already proven to be an efficient technique to achieve physical layer security in wireless communications. System architectures based on vector modulators provide a flexible framework to implement synthesis methods that allow us to obtain increased security and/or independent multichannel transmissions. However, the implementation of DDM with vector modulators requires an accurate calibration (amplitude and phase) of every component in the RF path. In this contribution, we study the sensitivity of the response of a DDM system based on commercial vector modulators showing how to correct the nonideal behavior of all the components thanks to the flexibility provided by the vector modulator.

scholarly journals A Review of Antenna Array Technologies for Point-to-Point and Point-to-Multipoint Wireless Communications at Millimeter-Wave Frequencies

2021 ◽  
Vol 2021 ◽  
pp. 1-18
Author(s):  
G. Federico ◽  
D. Caratelli ◽  
G. Theis ◽  
A. B. Smolders
Keyword(s):  
Wireless Communications ◽  
Antenna Array ◽  
Antenna Arrays ◽  
Communication Systems ◽  
High Gain ◽  
Multimedia Services ◽  
Ongoing Research ◽  
Array Technology ◽  
Point To Point ◽  
Technical Solutions

With the introduction of 5G communication systems operating in the mm-wave frequency range, new opportunities in terms of multimedia services and applications will become available. For this to happen, several technical challenges from an antenna standpoint need to be addressed. The achievements of high-gain characteristics and agile beamforming with wide-scan capabilities are the main targets of the ongoing research on mm-wave antenna arrays. In this paper, an up-to-date overview of antenna array technology for wireless communications at mm-wave frequencies is given. Particular focus is put on the review of the state-of-the art and most advanced antenna array concepts for point-to-point and point-to-multipoint radio links at said frequencies. Various figures of merit are assessed for a comprehensive analysis and bench marking of the technical solutions investigated in the presented survey.

scholarly journals RECONFIGURABLE INTELLIGENT SURFACES FOR WIRELESS COMMUNICATIONS: BEYOND 5G

2021 ◽  
Vol 6 (4) ◽  
Author(s):  
Chandrala M S ◽  
Dr. Kiran V
Keyword(s):  
Wireless Communications ◽  
Critical Analysis ◽  
Physical Layer ◽  
Reliable Transmission ◽  
Wireless Environment ◽  
Intended Receiver ◽  
Reflecting Surfaces

The advancement in the technology has led to the tremendous variance in the 5G domain. Development in some of the physical layer technologies would help think beyond 5G. One such technology is Intelligent Reflecting Surfaces (IRS). IRS caters to focusing the reception of the signal, only to the intended receiver, without loss of power. This otherwise termed as beamforming. In this a new and vast dimension, the wireless environment, in which signal propagates, to be tuned, for reliable transmission. The paper deals about what are Intelligent Reflecting Surfaces, features, false ideas, and critical analysis of how IRS can be a part of future beyond 5G.

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