The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
HAPS(고고도 플랫폼 스테이션)는 6세대(100G) 모바일 통신 이상의 커버리지 확장을 위한 유망 기술로 인식되고 있습니다. 본 연구의 목적은 배열 안테나 구조와 사용자 선택이라는 두 가지 측면에 초점을 맞춰 커버리지 반경 100km, 고용량의 HAPS 시스템을 개발하는 것이다. HAPS 시스템은 용량을 늘리기 위해 대규모 mMIMO(다중 입력 다중 출력) 및 다중 사용자 MIMO 기술을 공동으로 사용해야 합니다. 그러나 기존 평면 배열 안테나의 도달 범위는 반경이 수십 킬로미터에 불과한 원형 영역으로 제한됩니다. 기존의 채널 벡터 직교성을 기반으로 한 SUS(Semi-Orthogonal User Selection) 방식은 높은 용량을 구현하지만 복잡도가 높다. 첫째, 본 논문에서는 100km의 초광대역 커버리지와 고용량을 구현하는 원통형 mMIMO 시스템을 제안한다. 둘째, 본 논문에서는 모든 사용자 그룹에 걸쳐 사용자 간의 최소 각도 차이를 최대화하는 방식으로 사용자 선택 문제를 공식화하는 새로운 각도 기반 사용자 선택(AUS) 방식을 제시합니다. 마지막으로 AUS를 위한 낮은 복잡성의 차선 알고리즘(SA)도 제안되었습니다. 반경 12km의 영역을 가정하면, 시뮬레이션 결과는 제안된 원통형 mMIMO 시스템이 신호 대 간섭 + 잡음 비율을 약 1.5% 향상시키는 것을 보여줍니다. 영역 경계에서 1dB이며 약 4000dB를 달성합니다. 평면 배열 안테나를 사용하는 기존 mMIMO보다 용량이 XNUMX배 더 높습니다. 또한, 결과는 제안된 AUS 방식이 SUS 및 기본 무작위 사용자 선택에 비해 시스템 용량 분포의 낮은 백분위수를 향상시키는 것을 보여줍니다. 또한 제안된 SA의 계산 복잡도는 SUS의 XNUMX/XNUMX 정도에 불과합니다.
Koji TASHIRO
SoftBank Corp.
Kenji HOSHINO
SoftBank Corp.
Atsushi NAGATE
SoftBank Corp.
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Koji TASHIRO, Kenji HOSHINO, Atsushi NAGATE, "Cylindrical Massive MIMO System with Low-Complexity Angle-Based User Selection for High-Altitude Platform Stations" in IEICE TRANSACTIONS on Communications,
vol. E105-B, no. 4, pp. 449-460, April 2022, doi: 10.1587/transcom.2021WWP0003.
Abstract: High-altitude platform stations (HAPSs) are recognized as a promising technology for coverage extension in the sixth generation (6G) mobile communications and beyond. The purpose of this study is to develop a HAPS system with a coverage radius of 100km and high capacity by focusing on the following two aspects: array antenna structure and user selection. HAPS systems must jointly use massive multiple-input multiple-output (mMIMO) and multiuser MIMO techniques to increase their capacity. However, the coverage achieved by a conventional planar array antenna is limited to a circular area with a radius of only tens of kilometers. A conventional semi-orthogonal user selection (SUS) scheme based on the orthogonality of channel vectors achieves high capacity, but it has high complexity. First, this paper proposes a cylindrical mMIMO system to achieve an ultra-wide coverage radius of 100km and high capacity. Second, this paper presents a novel angle-based user selection (AUS) scheme, where a user selection problem is formulated as a maximization of the minimum angular difference between users over all user groups. Finally, a low-complexity suboptimal algorithm (SA) for AUS is also proposed. Assuming an area with a 100km radius, simulation results demonstrate that the proposed cylindrical mMIMO system improves the signal-to-interference-plus-noise ratio by approx. 12dB at the boundary of the area, and it achieves approx. 1.5 times higher capacity than the conventional mMIMO which uses a planar array antenna. In addition, the results show that the proposed AUS scheme improves the lower percentiles in the system capacity distribution compared with SUS and basic random user selection. Furthermore, the computational complexity of the proposed SA is in the order of only 1/4000 that of SUS.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.2021WWP0003/_p
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@ARTICLE{e105-b_4_449,
author={Koji TASHIRO, Kenji HOSHINO, Atsushi NAGATE, },
journal={IEICE TRANSACTIONS on Communications},
title={Cylindrical Massive MIMO System with Low-Complexity Angle-Based User Selection for High-Altitude Platform Stations},
year={2022},
volume={E105-B},
number={4},
pages={449-460},
abstract={High-altitude platform stations (HAPSs) are recognized as a promising technology for coverage extension in the sixth generation (6G) mobile communications and beyond. The purpose of this study is to develop a HAPS system with a coverage radius of 100km and high capacity by focusing on the following two aspects: array antenna structure and user selection. HAPS systems must jointly use massive multiple-input multiple-output (mMIMO) and multiuser MIMO techniques to increase their capacity. However, the coverage achieved by a conventional planar array antenna is limited to a circular area with a radius of only tens of kilometers. A conventional semi-orthogonal user selection (SUS) scheme based on the orthogonality of channel vectors achieves high capacity, but it has high complexity. First, this paper proposes a cylindrical mMIMO system to achieve an ultra-wide coverage radius of 100km and high capacity. Second, this paper presents a novel angle-based user selection (AUS) scheme, where a user selection problem is formulated as a maximization of the minimum angular difference between users over all user groups. Finally, a low-complexity suboptimal algorithm (SA) for AUS is also proposed. Assuming an area with a 100km radius, simulation results demonstrate that the proposed cylindrical mMIMO system improves the signal-to-interference-plus-noise ratio by approx. 12dB at the boundary of the area, and it achieves approx. 1.5 times higher capacity than the conventional mMIMO which uses a planar array antenna. In addition, the results show that the proposed AUS scheme improves the lower percentiles in the system capacity distribution compared with SUS and basic random user selection. Furthermore, the computational complexity of the proposed SA is in the order of only 1/4000 that of SUS.},
keywords={},
doi={10.1587/transcom.2021WWP0003},
ISSN={1745-1345},
month={April},}
부
TY - JOUR
TI - Cylindrical Massive MIMO System with Low-Complexity Angle-Based User Selection for High-Altitude Platform Stations
T2 - IEICE TRANSACTIONS on Communications
SP - 449
EP - 460
AU - Koji TASHIRO
AU - Kenji HOSHINO
AU - Atsushi NAGATE
PY - 2022
DO - 10.1587/transcom.2021WWP0003
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E105-B
IS - 4
JA - IEICE TRANSACTIONS on Communications
Y1 - April 2022
AB - High-altitude platform stations (HAPSs) are recognized as a promising technology for coverage extension in the sixth generation (6G) mobile communications and beyond. The purpose of this study is to develop a HAPS system with a coverage radius of 100km and high capacity by focusing on the following two aspects: array antenna structure and user selection. HAPS systems must jointly use massive multiple-input multiple-output (mMIMO) and multiuser MIMO techniques to increase their capacity. However, the coverage achieved by a conventional planar array antenna is limited to a circular area with a radius of only tens of kilometers. A conventional semi-orthogonal user selection (SUS) scheme based on the orthogonality of channel vectors achieves high capacity, but it has high complexity. First, this paper proposes a cylindrical mMIMO system to achieve an ultra-wide coverage radius of 100km and high capacity. Second, this paper presents a novel angle-based user selection (AUS) scheme, where a user selection problem is formulated as a maximization of the minimum angular difference between users over all user groups. Finally, a low-complexity suboptimal algorithm (SA) for AUS is also proposed. Assuming an area with a 100km radius, simulation results demonstrate that the proposed cylindrical mMIMO system improves the signal-to-interference-plus-noise ratio by approx. 12dB at the boundary of the area, and it achieves approx. 1.5 times higher capacity than the conventional mMIMO which uses a planar array antenna. In addition, the results show that the proposed AUS scheme improves the lower percentiles in the system capacity distribution compared with SUS and basic random user selection. Furthermore, the computational complexity of the proposed SA is in the order of only 1/4000 that of SUS.
ER -