Diffractal Spatial Multiplexing for Free-space Communication with Roving Transceivers

Weng, Xiaojing; Muminov, Baurzhan; Vuong, Luat T.

doi:10.1364/fio.2020.fth5e.5

Cited by 3 publications

(2 citation statements)

References 4 publications

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“…The unique property of diffractal redundancy enables misaligned or non-coaxial roaming transceiver 30,31 . The proposed DSDM system involves: multiplexing (where the transmitted data is a fractal from kernel data), diffraction encoding (when the beam propagates to the receiver), and demultiplexing (which is hybrid system, composed of an optical receiver and a software reconstruction) [Fig.…”

Section: Introductionmentioning

confidence: 99%

Fractal, Diffraction-encoded Space-Division Multiplexing for FSO with Misalignment-Robust, Roaming Transceivers

Weng

Vuong

2021

Preprint

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With free space optical (FSO) communication systems, information is generally transmitted to minimize diffraction. Here, we demonstrate an alternate paradigm, "diffractal space-division multiplexing" (DSDM), in which the diffraction of fractals enable a wider cone for reception to support roaming transceiver. As a result, DSDM is robust to misalignment over longer-distance links. We examine the consequence of mid-field, non-far-field propagation and the result on kernel bit error rates. The sparse and redundant encoding of information in DSDM may be relevant to other FSO acquisition, pointing, and tracking.

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Section: Introductionmentioning

confidence: 99%

Fractal, Diffraction-encoded Space-Division Multiplexing for FSO with Misalignment-Robust, Roaming Transceivers

Weng

Vuong

2021

Preprint

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“…1. The unique properties of diffractal redundancy enable the simultaneous transmission of multiple independent bit streams; 36,37 in the far field, arbitrary parts of a diffractal contain sufficient information to recreate the entire original (sparse) signal. 38,39 Transmitted beams with higher fractal orders achieve higher reconstruction accuracy [see right column of Fig.…”

Section: Introductionmentioning

confidence: 99%

Fractal, Diffraction-encoded Space-Division Multiplexing for Free Space Optical Communication

Weng¹,

Vuong²

2021

Preprint

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With free space optical (FSO) systems, information is generally transmitted to minimize diffraction. Here, we demonstrate an alternate paradigm in which multiple spatial bit streams are diffraction-encoded, an approach that enables a wider cone for reception and is especially robust to noise. We leverage the fact that diffracted fractal patterns or diffractals redundantly encode information over large areas as they propagate to the far field. This scheme enables a roving receiver to capture multiple spatial bits simultaneously when sampling a portion of the far-field beam. Our numerical FSO studies with and without atmospheric turbulence are a basis for new design considerations governing roaming area, beam divergence, and proper diffraction encoding. Concepts related to the sparse complexity of fractal, diffracted patterns show promise for diffractal space division multiplexing and may also be applied to channel marking, sensing, imaging, and other FSO systems.

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Fractal, diffraction-encoded space-division multiplexing for FSO with misalignment-robust, roaming transceivers

Weng

Vuong

2022

Sci Rep

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For free space optical (FSO) communication, a small misalignment of the transceivers may result in link failure or severe performance degradation. It can be difficult to track the narrow optical beams over long distances. Here, we propose “diffractal space-division multiplexing” (DSDM), an FSO transmission system capable of supporting misaligned roaming transceivers. This system enables spatial multiplexing for enhanced data capacity with partial off-axis beam reception. We numerically simulate and analyze the performance of the DSDM system with a particular focus on the divergence angle, roaming area, kernel bit-error-rate (K-BER), and fractal order. Our simulation results achieve K-BERs of 10$$^{-3}$$ - 3 with $$81\times 81$$ 81 × 81 -pixel fractal beams at link distances of 2.5 km when the receiver sizes are 30$$\%$$ % of the effective beam diameter.

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Diffractal Spatial Multiplexing for Free-space Communication with Roving Transceivers

Abstract: We demonstrate diffractal spatial multiplexing for wireless communication for moving transceivers. The approach leverages free-space diffraction with optical demodulation schemes. Exponentially-enhanced data rates are achieved without tracking.

Cited by 3 publications

References 4 publications

Fractal, Diffraction-encoded Space-Division Multiplexing for FSO with Misalignment-Robust, Roaming Transceivers

Fractal, Diffraction-encoded Space-Division Multiplexing for FSO with Misalignment-Robust, Roaming Transceivers

Fractal, Diffraction-encoded Space-Division Multiplexing for Free Space Optical Communication

Fractal, diffraction-encoded space-division multiplexing for FSO with misalignment-robust, roaming transceivers

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