Line-of-Sight Millimeter-Wave Communications Using Orbital Angular Momentum Multiplexing Combined With Conventional Spatial Multiplexing

Ren, Yongxiong; Li, Long; Xie, Guodong; Yan, Yan; Cao, Yinwen; Huang, Hao; Ahmed, Nisar; Zhao, Zhe; Liao, Peicheng; Zhang, Chongfu; Caire, Giuseppe; Molisch, Andreas F.; Tur, Moshe; Willner, Alan E.

doi:10.1109/twc.2017.2675885

Cited by 169 publications

(73 citation statements)

References 47 publications

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“…Moreover, as described in Section III, radio OAM can be generated not only by employing antenna arrays, but also by using SPPs or spiral parabolic antennas or other single transmit antennas. Combining OAM with traditional MIMO technology can result in higher capacity gains [154], [155] or provide a more flexible system design [156], [157]. A 2 × 2 antenna aperture architecture, where each aperture multiplexes two OAM modes, is implemented in the 28 GHz band to achieve a 16 Gbit/s transmission rate.…”

Section: Radio Oam Communicationsmentioning

confidence: 99%

“…A 2 × 2 antenna aperture architecture, where each aperture multiplexes two OAM modes, is implemented in the 28 GHz band to achieve a 16 Gbit/s transmission rate. At the receiving end, MIMO signal processing is employed to mitigate inter-channel interference [157]. Such a system architecture incorporating OAM multiplexing and MIMO technology can also be used for free-space optical communication links [158].…”

Section: Radio Oam Communicationsmentioning

confidence: 99%

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Orbital Angular Momentum Waves: Generation, Detection, and Emerging Applications

Chen

Zhou

Moretti

et al. 2020

IEEE Commun. Surv. Tutorials

265

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Orbital angular momentum (OAM) has aroused a widespread interest in many fields, especially in telecommunications due to its potential for unleashing new capacity in the severely congested spectrum of commercial communication systems. Beams carrying OAM have a helical phase front and a field strength with a singularity along the axial center, which can be used for information transmission, imaging and particle manipulation. The number of orthogonal OAM modes in a single beam is theoretically infinite and each mode is an element of a complete orthogonal basis that can be employed for multiplexing different signals, thus greatly improving the spectrum efficiency. In this paper, we comprehensively summarize and compare the methods for generation and detection of optical OAM, radio OAM and acoustic OAM. Then, we represent the applications and technical challenges of OAM in communications, including free-space optical communications, optical fiber communications, radio communications and acoustic communications. To complete our survey, we also discuss the state of art of particle manipulation and target imaging with OAM beams.

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Section: Radio Oam Communicationsmentioning

confidence: 99%

Section: Radio Oam Communicationsmentioning

confidence: 99%

Orbital Angular Momentum Waves: Generation, Detection, and Emerging Applications

Chen

Zhou

Moretti

et al. 2020

IEEE Commun. Surv. Tutorials

265

View full text Add to dashboard Cite

show abstract

“…The high SNR in the narrow region can increase capacity of radio transmission system by using arrays of OAM antennas as in [15][16][17].…”

Section: Condition For Increased Coveragementioning

confidence: 99%

Indoor Propagation of Electromagnetic Waves with Orbital Angular Momentum at 5.8 GHz

Jeong

Kim

Lee

2018

International Journal of Antennas and Propagation

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Propagation of electromagnetic waves with orbital angular momentum (OAM) is investigated in indoor environments. The OAM modes generated by circular patch array antennas are used. With proper alignment and suppressed multipath, the OAM modes can transport multiple wireless data stream at the same time. Through measurements and ray-tracing simulations, it is found that the advantages of OAM modes are limited if those two conditions are not satisfied. It is also found that multipath effect can be enervated by using narrow beam antennas.

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“…These filters extract useful information from noisy data and employ recursive algorithms for continuous adjustment within a changing environment for example when signal statistics are not defined priori, and also when there is a spectral overlap between the signal of interest and noisy signal. Equalizers that have been used thus far in MDM include least-mean-square algorithm which reduce the mean square error between the received and target channel impulse response [25], recursive least-squares which recursively finds the coefficients that minimize a weighted linear least squares cost function relating to the received and target channel impulse response [26], space-time block coding exploiting space and delay diversity [27], constant modulus algorithm [28] and multi-modulus blind equalization [29]. RLS is preferable for next-generation MDM systems with faster convergence time compared to LMS.…”

Section: Related Workmentioning

confidence: 99%

Effect of decision feedback equalizer taps on 3×6- channel mode-wavelength division multiplexing system performance in multimode fiber

2017

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Abstract. In this paper, the effect of tap configurations in a decision feedback equalizer is investigated for controlling modal dispersion in a 60Gb/s 18-channel mode division multiplexing -wavelength division multiplexing system in a 2.5km multimode fiber on three Laguerre-Gaussian modes and six wavelengths centered at 1550nm. Spectrum analyser diagrams and bit error rate measurements show satisfactory performance for feed forward -feedback tap combinations (10,5), (14,0), (15,6) and (15,10) by effectively suppressing higher order modes.

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Line-of-Sight Millimeter-Wave Communications Using Orbital Angular Momentum Multiplexing Combined With Conventional Spatial Multiplexing

Cited by 169 publications

References 47 publications

Orbital Angular Momentum Waves: Generation, Detection, and Emerging Applications

Orbital Angular Momentum Waves: Generation, Detection, and Emerging Applications

Indoor Propagation of Electromagnetic Waves with Orbital Angular Momentum at 5.8 GHz

Effect of decision feedback equalizer taps on 3×6- channel mode-wavelength division multiplexing system performance in multimode fiber

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