A wireless communication scheme based on space- and frequency-division multiplexing using digital metasurfaces

Zhang, Lei; Chen, Ming Zheng; Tang, Wankai; Dai, Jun; Miao, Long; Zhou, Xiao; Jin, Shi; Cheng, Qiang; Cui, Tie Jun

doi:10.1038/s41928-021-00554-4

Cited by 313 publications

(177 citation statements)

References 54 publications

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“…Measured results show that two different pictures are directly transmitted to two users simultaneously in real time with a high transmission rate (see the inset in Figure 12(b)), validating the feasibility of the space-and frequency-multiplexed information encoding scheme. More results of the dualchannel system with arbitrary user locations as well as the three-channel system can be found in [118]. The STC digital metasurface simultaneously plays the role of information modulation and energy radiation.…”

Section: Space-and Frequency-division Multiplexing Wirelessmentioning

confidence: 99%

“…The STC digital metasurfaces with simultaneous controls of the spatial and spectral characteristics can be used to overcome the aforementioned limitations and challenges, which have the advantages of low cost, simple structures, and easy fabrications. In [ 118 ], a new information encoding scheme based on the STC digital metasurface was proposed to implement both the space- and frequency-division multiplexing techniques in a multichannel wireless communication system. By encoding the optimized STC matrices (see Figure 2 in [ 118 ]), different digital messages can be directly transmitted to multiple users simultaneously and independently.…”

Section: Recent Advances and Representative Applicationsmentioning

confidence: 99%

“…In [ 118 ], a new information encoding scheme based on the STC digital metasurface was proposed to implement both the space- and frequency-division multiplexing techniques in a multichannel wireless communication system. By encoding the optimized STC matrices (see Figure 2 in [ 118 ]), different digital messages can be directly transmitted to multiple users simultaneously and independently. As illustrated in Figure 12(a) , a multichannel wireless communication system of direct data transmission is established by using an STC digital metasurface.…”

Section: Recent Advances and Representative Applicationsmentioning

confidence: 99%

“…That is to say, one can simultaneously manipulate the harmonic distribution and propagation direction of reflected waves [ 110 ]. The STC digital metasurfaces extend and generalize the concepts of “phase-switched screens” [ 111 ] and “time-modulated arrays” [ 112 ] and have been applied successfully to harmonic beam control [ 110 ], scattering reduction [ 110 ], nonreciprocal effect [ 113 ], multibit phase generation [ 114 ], terahertz harmonic manipulations [ 115 ], spread-spectrum camouflaging [ 116 ], analog computing [ 117 ], and wireless communications [ 118 ].…”

Section: Introductionmentioning

confidence: 99%

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Space-Time-Coding Digital Metasurfaces: Principles and Applications

Zhang

Cui

2021

Research

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Space-time-modulated metastructures characterized by spatiotemporally varying properties have recently attracted great interest and become one of the most fascinating and promising research fields. In the meantime, space-time-coding digital metasurfaces with inherently programmable natures emerge as powerful and versatile platforms for implementing the spatiotemporal modulations, which have been successfully realized and used to manipulate the electromagnetic waves in both the spectral and spatial domains. In this article, we systematically introduce the general concepts and working principles of space-time-coding digital metasurfaces and provide a comprehensive survey of recent advances and representative applications in this field. Specifically, we illustrate the examples of complicated wave manipulations, including harmonic beam control and programmable nonreciprocal effect. The fascinating strategy of space-time-coding opens the door to exciting scenarios for information systems, with abundant applications ranging from wireless communications to imaging and radars. We summarize this review by presenting the perspectives on the existing challenges and future directions in this fast-growing research field.

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Section: Space-and Frequency-division Multiplexing Wirelessmentioning

confidence: 99%

Section: Recent Advances and Representative Applicationsmentioning

confidence: 99%

Section: Recent Advances and Representative Applicationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Space-Time-Coding Digital Metasurfaces: Principles and Applications

Zhang

Cui

2021

Research

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“…Diffractive phase gratings are commonly empolyed for OAM mode generation and multiplexing. Recently, digitally programmable metasurfaces are successfully used for OAM-based MDM communications 19 , 20 . In addition to MDM, the vortex beams carrying OAM can also be regarded as symbols to realize data coding/decoding transmission, which also called OAM shift-keying.…”

Section: Introductionmentioning

confidence: 99%

Experimental demonstration of multiple dimensional coding decoding for image transfer with controllable vortex arrays

Zhu

Wang

Deng

et al. 2021

Sci Rep

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Vortex beams carrying orbital angular momentum (OAM), which featuring helical phase front, have been regarded as an alternative spatial degree of freedom for optical mode coding and multiplexing. For most reported OAM-based mode coding schemes, data information is only encoded by different OAM mode states. In this paper, we introduce a novel design technique to construct vortex array phase grating (VAPGs) for the flexible generation of vortex arrays, and employ the proposed VAPGs to realize multi-dimensional space/mode/amplitude coding/decoding. By designing VAPGs with different parameters and loading them on to a single spatial light modulator (SLM), we successfully generate vortex array with different mode states and relative power in the experiments. Moreover, a 10-bit multi-dimensional space/mode/amplitude data coding/decoding scheme for image transfer in free-space link with a zero bit-error-rate is experimentally demonstrated, which confirm the feasibility of our proposed VAPG-based coding/decoding scheme.

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