An Experimental Demonstration of 28 GHz Band Wireless OAM-MIMO (Orbital Angular Momentum Multi-Input and Multi-Output) Multiplexing

Lee, Doohwan; Sasaki, Hirofumi; Fukumoto, Hisao; Yagi, Yasunori; Takano, Kunihiko; Shibata, Hiroyuki; Shimizu, Takashi

doi:10.1109/vtcspring.2018.8417790

Cited by 69 publications

(34 citation statements)

References 13 publications

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“…Following the signal model in (10), the detection matrix D(k p ) can be designed as the cascade of the beam steering matrix B(k p ), the despiralization matrix F U and the amplitude detection matrix Γ −1 (k p ), i.e., Fig. 8: The prototype of an uniform concentric circular array with 64 elements for OAM-MIMO multiplexing in [19].…”

Section: Multi-mode Oam Signal Receptionmentioning

confidence: 99%

“…However, radiating multi-mode OAM beams from a single aperture still has big challenges. So far, a few antenna structures have been proposed to generate multi-mode OAM waves by SPPs [4], solid cylinder dielectric resonator antenna [15], a tri-mode concentric circularly polarized patch antenna [16], metallic traveling-wave ring-slot structure [17], time-switched array structure [18], the uniform concentric circular array (UCCA) [19] and metasurface [20], [21]. Since antenna array is popular in modern wireless communication systems (e.g., 4G, 5G and Beyond 5G) and easy to steer the beam direction of OAM [22], [23], we focus on the UCA instead of other complicated antenna structures for OAM generation and reception in this paper.…”

Section: Introductionmentioning

confidence: 99%

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Multi-Mode OAM Radio Waves: Generation, Angle of Arrival Estimation and Reception With UCAs

Chen

Long

Wang

et al. 2020

IEEE Trans. Wireless Commun.

119

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Orbital angular momentum (OAM) at radio frequency (RF) provides a novel approach of multiplexing a set of orthogonal modes on the same frequency channel to achieve high spectrum efficiencies. However, there are still big challenges in the multi-mode OAM generation, OAM antenna alignment and OAM signal reception. To solve these problems, we propose an overall scheme of the line-of-sight multi-carrier and multi-mode OAM (LoS MCMM-OAM) communication based on uniform circular arrays (UCAs). First, we verify that UCA can generate multi-mode OAM radio beam with both the RF analog synthesis method and the baseband digital synthesis method. Then, for the considered UCA-based LoS MCMM-OAM communication system, a distance and AoA estimation method is proposed based on the two-dimensional ESPRIT (2-D ESPRIT) algorithm. A salient feature of the proposed LoS MCMM-OAM and LoS MCMM-OAM-MIMO systems is that the channel matrices are completely characterized by three parameters, namely, the azimuth angle, the elevation angle and the distance, independent of the numbers of subcarriers and antennas, which significantly reduces the burden by avoiding estimating large channel matrices, as traditional MIMO-OFDM systems. After that, we propose an OAM reception scheme including the beam steering with the estimated AoA and the amplitude detection with the estimated distance. At last, the proposed methods are extended to the LoS MCMM-OAM-MIMO system equipped with uniform concentric circular arrays (UCCAs). Both mathematical analysis and simulation results validate that the proposed OAM reception scheme can eliminate the effect of the misalignment error of a practical OAM channel and approaches the performance of an ideally aligned OAM channel. Index Terms-Orbital angular momentum (OAM), uniform circular array (UCA), angle of arrival (AoA) estimation, OAM detection, multiple-input multiple-output (MIMO).

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Section: Multi-mode Oam Signal Receptionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multi-Mode OAM Radio Waves: Generation, Angle of Arrival Estimation and Reception With UCAs

Chen

Long

Wang

et al. 2020

IEEE Trans. Wireless Commun.

119

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“…At the receiver end, sometimes hardware analogues to the transmitter radio is used to successfully decode the transmitted signal, for example in circular array-based OAM reception in [14]- [17] and in the planar array system [18]. Receive-side methods for OAM signal recovery are problematical.…”

Section: Introductionmentioning

confidence: 99%

Physical Layer Secure Communication Using Orbital Angular Momentum Transmitter and a Single-Antenna Receiver

Abbasi

Fusco

Naeem

et al. 2020

IEEE Trans. Antennas Propagat.

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Orbital Angular Momentum (OAM) for radio communications has the potential of simultaneously transmitting multiple signals at the same frequency and time resources. This multiplies the achievable channel capacity at a given bandwidth by increasing the available number of simultaneous data streams. One downside of OAM radio communication is the requirement of multi-mode radio frequency (RF) hardware at both ends of a link i.e. transmitter as well as the receiver. This is not always practically viable, especially as we move towards low profile receivers in future communication devices. In this work, we present a novel method of OAM-based radio communication with enhanced physical layer security that requires only a single antenna receiver. We first present the system architecture, then we design and realize a Rotman lens-based circular antenna array transmitter operating at 5.8 GHz. We then experimentally verify the capability of the hardware to create multiple modes. As a proof-of-concept, we propose a communication system that simultaneously uses mode 0 and +1 of the OAM beamformer and in doing so show how a single receive antenna can be used for data recovery. We first identify a general analogue modulation expression and use the proposed system to transmit digitally modulated data stream to a single antenna equipped receiver. A pre-communication training sequence is required to realize the proposed approach. Experimental results verify the simulated predictions.

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“…We also developed and proposed OAM-MIMO multiplexing using multiple UCAs. Unlike OAM multiplexing, OAM-MIMO multiplexing exploits multiple sets of the same OAM modes with receiver equalizations [7]. This enables the number of concurrently transmitted data streams to be increased without using higher OAM modes that have large beam divergence.…”

Section: Introductionmentioning

confidence: 99%

An Evaluation of Orbital Angular Momentum Multiplexing Technology

et al. 2019

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This paper reports our investigation of wireless communication performance obtained using orbital angular momentum (OAM) multiplexing, from theoretical evaluation to experimental study. First, we show how we performed a basic theoretical study on wireless OAM multiplexing performance regarding modulation, demodulation, multiplexing, and demultiplexing. This provided a clear picture of the effects of mode attenuation and gave us insight into the potential and limitations of OAM wireless communications. Then, we expanded our study to experimental evaluation of a dielectric lens and end-to-end wireless transmission on 28 gigahertz frequency bands. To overcome the beam divergence of OAM multiplexing, we propose a combination of multi-input multi-output (MIMO) and OAM technology, named OAM-MIMO multiplexing. We achieved 45 Gbps (gigabits per second) throughput using OAM multiplexing with five OAM modes. We also experimentally demonstrated the effectiveness of the proposed OAM-MIMO multiplexing using a total of 11 OAM modes. Experimental OAM-MIMO multiplexing results reached a new milestone for point-to-point transmission rates when 100 Gbps was achieved at a 10-m transmission distance.

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An Experimental Demonstration of 28 GHz Band Wireless OAM-MIMO (Orbital Angular Momentum Multi-Input and Multi-Output) Multiplexing

Cited by 69 publications

References 13 publications

Multi-Mode OAM Radio Waves: Generation, Angle of Arrival Estimation and Reception With UCAs

Multi-Mode OAM Radio Waves: Generation, Angle of Arrival Estimation and Reception With UCAs

Physical Layer Secure Communication Using Orbital Angular Momentum Transmitter and a Single-Antenna Receiver

An Evaluation of Orbital Angular Momentum Multiplexing Technology

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