Asymmetrically Routed Phased Arrays as an Enabler for Analog Directional Encoding
Delfini, Duccio; Tervo, Nuutti; Javed, Muhammad Y.; Leinonen, Marko E.; Pärssinen, Aarno (2025-05-21)
IEEE
21.05.2025
D. Delfini, N. Tervo, M. Y. Javed, M. E. Leinonen and A. Pärssinen, "Asymmetrically Routed Phased Arrays as an Enabler for Analog Directional Encoding," 2025 19th European Conference on Antennas and Propagation (EuCAP), Stockholm, Sweden, 2025, pp. 1-5, doi: 10.23919/EuCAP63536.2025.11000014.
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© 2025 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works.
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:oulu-202505263907
https://urn.fi/URN:NBN:fi:oulu-202505263907
Tiivistelmä
Abstract
This paper introduces the concept of analog directional encoding as a new approach for delivering an encoded signal towards specific targets only while providing white noise to most of the other directions. The proposed method exploits the directional dependency of the group delay between each pair of adjacent antennas in series-fed asymmetrically routed phased arrays to generate “beams of correlation”, which have analogous behaviors of the power beam patterns in classical analogical beam-forming methods. This strategy allows two additional security layers to the communication, consisting in the necessary knowledge of the encoding scheme and of the steering direction of the transmitter in order to correctly decode the received message. Moreover, the received message can be compared with the sent message, if it is a priori known, to estimate the angle-of-arrival of the signal.
This paper introduces the concept of analog directional encoding as a new approach for delivering an encoded signal towards specific targets only while providing white noise to most of the other directions. The proposed method exploits the directional dependency of the group delay between each pair of adjacent antennas in series-fed asymmetrically routed phased arrays to generate “beams of correlation”, which have analogous behaviors of the power beam patterns in classical analogical beam-forming methods. This strategy allows two additional security layers to the communication, consisting in the necessary knowledge of the encoding scheme and of the steering direction of the transmitter in order to correctly decode the received message. Moreover, the received message can be compared with the sent message, if it is a priori known, to estimate the angle-of-arrival of the signal.
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