Spatial Data Encryption Using Phase Conjugating Lenses

Spatial encryption of a BPSK modulated signal radiated by a dipole-like antenna and transmitted through a phase conjugating lens (PCL) or through a system of PC lenses in free space is theoretically studied using a time domain electromagnetic (EM) formulation. The PC lenses are composed of antenna e...

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Bibliographic Details
Published in:IEEE transactions on antennas and propagation 2012-06, Vol.60 (6), p.2913-2920
Main Authors: Malyuskin, O., Fusco, V.
Format: Article
Language:English
Subjects:
Antenna array
Antennas
Applied classical electromagnetism
Applied sciences
Arrays
Binary phase shift keying
Bit error rate
bit error rate analysis
communication system security
Demodulation
Electromagnetic wave propagation, radiowave propagation
Electromagnetism
electron and ion optics
Encryption
Exact sciences and technology
Fundamental areas of phenomenology (including applications)
Lenses
Modulation
phase conjugation
phase detection
phase shift keying
Physics
Polycarbonates
Pumps
Radiocommunications
Secret
Signal detection
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
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Summary:Spatial encryption of a BPSK modulated signal radiated by a dipole-like antenna and transmitted through a phase conjugating lens (PCL) or through a system of PC lenses in free space is theoretically studied using a time domain electromagnetic (EM) formulation. The PC lenses are composed of antenna elements interconnected via phase conjugating circuitry. It is shown that when the PCLs are modulated with a phase encoded pump sequence at the same rate as the BPSK information signal, spatial encryption in the space between the two PCLs is possible, while the signal can only be decoded in well defined spatial regions after passing a second PCL. The effect that phase offset between PCL modulation signals has on viable spatial demodulation regions is also discussed. We show also that the signal detection area can be further confined using a third phase encoded pumped PCL located behind the second lens and modulated by an arbitrary BPSK pump sequence. The considered spatial encryption mechanism can find applications in secure communications.
ISSN:0018-926X
1558-2221
DOI:10.1109/TAP.2012.2194661