Reconfigurable Intelligent Surface Based Orbital Angular Momentum: Architecture, Opportunities, and Challenges

Yang, Zhaohui; Hu, Ye; Zhang, Zhaoyang; Xu, Wei; Zhong, Caijun; Wong, Kai-Kit

doi:10.1109/mwc.001.2100223

Cited by 11 publications

(8 citation statements)

References 16 publications

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“…Sebelum memecahkan masalah diatas, https://doi.org/10.33998/processor.2024. 19 perlu diketahui analisis performa dari komunikasi sinyal ini sehingga dapat diketahui batasan teknologi untuk penerapan komunikasi jarak dekat.…”

Section: Pendahuluanunclassified

Analisis Performa Orbital Angular Momentum-Index Modulation Komunikasi Jarak Dekat 6G Waveform

Sutanto,

Teguh Yoga Putra

2024

processor

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Saat ini, komunikasi nirkabel sedang bermigrasi dari 5G ke 6G. Hal ini berlangsung dikarenakan penerapan baru dari teknologi Sensory Transmission, Intelligent Transportation System (ITS), dan Digital Twin. Masalah yang muncul dari penerapan migrasi ini adalah batasan pita yang diacu pada peraturan diatas, reliable link range atau berapa jarak bahwa komunikasi berhasil dilakukan, dan peningkatan jumlah pengguna yang akan dilayani. Penelitian ini menggunakan hasil performa Orbital Angular Momentum-Index Modulation (OAM-IM) yang dibandingkan dengan Orthogonal Frequency Division (OFDM) untuk komunikasi jarak dekat untuk tiap Bit Error Rate (BER) pada jarak yang telah disebutkan pada gambaran umum. Metode OAM-IM dapat menghasilkan nilai BER yang lebih rendah dibanding dengan metode OFDM melalui analisis statistik deskriptif. Hasil simulasi dijabarkan dalam bentuk tabel dan bagan dan dibandingkan BER dari kedua metode tersebut yang lebih rendah. Rata-rata BER OFDM adalah 0.486818 sedangkan BER yang lebih rendah tercatat pada metode OAM-IM sebesar 0.314013 untuk simulasi yang diajukan. Kata Kunci: Orbital Angular Momentum-Index Modulation; OAM-IM; Orthogonal Frequency Division; OFDM; Bit Error Rate; BER; Sensory Transmision; Intelligent Transportation System; ITS; Digital Twin; 5G; 6G

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Section: Pendahuluanunclassified

Analisis Performa Orbital Angular Momentum-Index Modulation Komunikasi Jarak Dekat 6G Waveform

Sutanto,

Teguh Yoga Putra

2024

processor

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“…1). The large number of scatterers with a controllable phase of RIS can be utilised to overcome the disadvantages of traditional methods to generate OAM beams [10]. Here, directed beams with unique OAM modes are produced by three RMTSs in the band between 90 and 110 GHz.…”

Section: Motivation and Contributionsmentioning

confidence: 99%

“…This screw dislocation of phase can be expressed mathematically by e jlϕ , where l denotes the mode's number or the changes of the wavefront around the intensity null and ϕ represents the azimuthal angle [8], [9]. By that, no additional resources, such as power, time, and frequency, will be required to deliver services to users [10]. Employing OAM beams means that a new generation of transceivers will begin, since these beams depend on the angular momentum compared to the linear momentum of traditional devices, which is restricted to one-dimensional motion.…”

Section: Introductionmentioning

confidence: 99%

Reflective Metasurface With Steered OAM Beams for THz Communications

et al. 2023

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The abundant spectrum resources and low beam divergence of the terahertz (THz) band, can be combined with the orthogonal propagation property of orbital angular momentum (OAM) beams to multi-fold the capacity of wireless communication systems. Here, a reflective metasurface (RMTS) is utilized to enhance the coverage of the high gain THz OAM beams by enabling the non-line-of-sight (NLoS) component by reshaping the planar wavefront of the incident wave into the helical wavefront, so that it is re-directed towards the direction of interest. This can contribute to alleviating the concern of the small aperture size, since improving the channel capacity can be achieved at the low spectrum blocks of the THz band (larger aperture size). For validation, three 90 × 90 mm RMTSs are simulated, fabricated, and tested in the frequency range 90-110 GHz, to re-direct single and dual OAM beams towards the desired location.INDEX TERMS Sixth-generation (6G), orbital angular momentum (OAM), reflective metasurface (RMTS), terahertz (THz).

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“…Furthermore, multiple users can be provided by OAM-based wireless communications in contrast with traditional multi-antenna beam-shaping. Since different OAM modes do not interfere with each other, the networks are simultaneously available for each users [72]. In wireless communication networks, obtaining OAM beams with traditional methods can deduct the transmission distance of OAM waves.…”

Section: B Orbital Angular Momentummentioning

confidence: 99%

“…In wireless communication networks, obtaining OAM beams with traditional methods can deduct the transmission distance of OAM waves. This problem arises from beam divergence and misalignment, which reduces the efficiency under non-lineof-sight situations [72]. By adding IRS to wireless communication systems, the non-line-of-sight conditions of mobile signals have been solved to a large extent.…”

Section: B Orbital Angular Momentummentioning

confidence: 99%

Multifunctional Automatic Metasurface Design Using Deep Learning Approach

Mahdi¹,

Ghorbani²,

Beyraghi³

et al. 2022

Preprint

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<p>This paper presents a new efficient and robust method for the automatic design of Metasurface (MS) by using a Deep Neural Network (DNN), which has less complexity and design time compared to conventional MS design methods. The main contribution of the present method is its ability the design reflective/transmissive MS for wave manipulation in a wide range of frequencies (12 GHz - 18 GHz). To this end, several multi-bit encoded MSs are provided that are of potential interest in single/multi-beam, Orbital Angular Momentum (OAM), and Phase Gradient Metasurface (PGM) antenna applications. In each case, the proposed DNN provides the required unit cell in two transmission and reflection modes from 12 GHz to 18 GHz for different targets. In order to demonstrate the performance of the proposed DNN method, the following steps are implemented: (i) first, the architecture of the DNN method and the creation of pixelated unit cells by DNN are discussed. This step presents 3-bit coded unit cells to design Intelligent Reflective Surfaces (IRS) in wireless communication systems. (ii) several single/multibeam reflective OAM and transmissive PGM high gain antenna structures are presented. (iii) In order to validate the proposed design concept, a Transmissive PGM lens antenna prototype with 22.6 dBi gain and Aperture Efficiency (AE) of 40% is experimentally tested at 14 GHz. Simulation and measurement results are in good agreement, which confirms the accuracy of the proposed method. The proposed DNN method can be considered a new reliable approach for designing reflective/transmissive MSs in applications of antenna and microwave with their highly demanding market.</p>

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Reconfigurable Intelligent Surface Based Orbital Angular Momentum: Architecture, Opportunities, and Challenges

Cited by 11 publications

References 16 publications

Analisis Performa Orbital Angular Momentum-Index Modulation Komunikasi Jarak Dekat 6G Waveform

Analisis Performa Orbital Angular Momentum-Index Modulation Komunikasi Jarak Dekat 6G Waveform

Reflective Metasurface With Steered OAM Beams for THz Communications

Multifunctional Automatic Metasurface Design Using Deep Learning Approach

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