TWI736617B - 用於大容量ｍｉｍｏ的參考信號和鏈路調適 - Google Patents

用於大容量ｍｉｍｏ的參考信號和鏈路調適 Download PDF

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TWI736617B
TWI736617B TW106114610A TW106114610A TWI736617B TW I736617 B TWI736617 B TW I736617B TW 106114610 A TW106114610 A TW 106114610A TW 106114610 A TW106114610 A TW 106114610A TW I736617 B TWI736617 B TW I736617B
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subframe
csi
data
srs
downlink
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TW106114610A
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TW201743576A (zh
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約瑟夫畢那米拉 索瑞亞嘉
帕樊庫馬爾 維泰拉德芙尼
肯 卡瑞克斯
庭芳 紀
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美商高通公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0417—Feedback systems
    • H04B7/0421—Feedback systems utilizing implicit feedback, e.g. steered pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0452—Multi-user MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H04B7/0456—Selection of precoding matrices or codebooks, e.g. using matrices antenna weighting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0617—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal for beam forming
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0613—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission
    • H04B7/0615—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal
    • H04B7/0619—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station using simultaneous transmission of weighted versions of same signal using feedback from receiving side
    • H04B7/0621—Feedback content
    • H04B7/0626—Channel coefficients, e.g. channel state information [CSI]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0691—Hybrid systems, i.e. switching and simultaneous transmission using subgroups of transmit antennas
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0226—Channel estimation using sounding signals sounding signals per se
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0037—Inter-user or inter-terminal allocation

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  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Detection And Prevention Of Errors In Transmission (AREA)
TW106114610A 2016-05-09 2017-05-03 用於大容量ｍｉｍｏ的參考信號和鏈路調適 TWI736617B (zh)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201662333693P 2016-05-09 2016-05-09
US62/333,693 2016-05-09
US15/584,740 US10505597B2 (en) 2016-05-09 2017-05-02 Reference signals and link adaptation for massive MIMO
US15/584,740 2017-05-02

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TW201743576A TW201743576A (zh) 2017-12-16
TWI736617B true TWI736617B (zh) 2021-08-21

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US (1) US10505597B2 (https=)
EP (1) EP3455949B1 (https=)
JP (1) JP6978432B2 (https=)
CN (1) CN109075827B (https=)
AU (1) AU2017264574B2 (https=)
TW (1) TWI736617B (https=)
WO (1) WO2017196604A1 (https=)

Families Citing this family (42)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20170108101A (ko) * 2015-01-29 2017-09-26 후아웨이 테크놀러지 컴퍼니 리미티드 멀티-캐리어 어그리게이션을 위한 통신 방법 및 장치
US10148346B1 (en) * 2016-08-04 2018-12-04 Sprint Spectrum L.P. Systems and methods for determining a frequency band for wireless backhaul
KR102551206B1 (ko) * 2016-09-07 2023-07-05 삼성전자주식회사 무선 통신 시스템에서 간섭 완화 장치 및 방법
US10736074B2 (en) 2017-07-31 2020-08-04 Qualcomm Incorporated Systems and methods to facilitate location determination by beamforming of a positioning reference signal
US10715229B2 (en) 2018-01-19 2020-07-14 At&T Intellectual Property I, L.P. Facilitating semi-open loop based transmission diversity for uplink transmissions for 5G or other next generation networks
US11923924B2 (en) * 2018-02-26 2024-03-05 Parallel Wireless, Inc. Miniature antenna array with polar combining architecture
CN112106317B (zh) * 2018-03-02 2023-09-15 索尼集团公司 用于波束管理的方法和终端
US11212051B2 (en) * 2018-03-06 2021-12-28 Qualcomm Incorporated Beam management for autonomous uplink with analog beams
US10715275B2 (en) 2018-05-11 2020-07-14 At&T Intellectual Property I, L.P. Configuring channel quality indicator for communication service categories in wireless communication systems
US10771139B2 (en) 2018-06-01 2020-09-08 Samsung Electronics Co., Ltd Apparatus and method for providing efficient beamforming feedback
US10516452B1 (en) * 2018-06-08 2019-12-24 University Of South Florida Using artificial signals to maximize capacity and secrecy of multiple-input multiple-output (MIMO) communication
US10644771B2 (en) * 2018-06-08 2020-05-05 University Of South Florida Using artificial signals to maximize capacity and secrecy of multiple-input multiple-output (MIMO) communication
US10492212B1 (en) 2018-06-22 2019-11-26 At&T Intellectual Property I, L.P. Scheduling ultra-reliable low latency communications in wireless communication systems
US11159290B2 (en) * 2018-06-28 2021-10-26 Acer Incorporated Device and method for handling a sounding reference signal transmission
EP3831118A4 (en) 2018-07-28 2022-03-23 Qualcomm Incorporated REMOTE INTERFERENCE MANAGEMENT REFERENCE SIGNAL
CN110536430B (zh) * 2018-09-05 2023-04-07 中兴通讯股份有限公司 通信及资源配置方法、装置、基站、终端及存储介质
US10862615B2 (en) 2018-11-09 2020-12-08 Samsung Electronics Co., Ltd Modulation and coding scheme selection for massive multiple-input multiple-output (MIMO) systems with partial channel information
WO2020112840A1 (en) 2018-11-27 2020-06-04 XCOM Labs, Inc. Non-coherent cooperative multiple-input multiple-output communications
US11277174B2 (en) * 2019-01-09 2022-03-15 Qualcomm Incorporated Channel state feedback computation and beam training for full-duplex communication
CN113366787B (zh) * 2019-01-16 2023-06-23 上海诺基亚贝尔股份有限公司 用于估计信道状态信息的方法、设备和计算机可读介质
US12273286B2 (en) 2019-01-21 2025-04-08 Qualcomm Incorporated Bandwidth part operation and downlink or uplink positioning reference signal scheme
US11777764B2 (en) 2019-03-28 2023-10-03 Qualcomm Incorporated Sounding reference signal waveform design for wireless communications
EP3911966A4 (en) 2019-03-28 2022-11-30 Huawei Technologies Co., Ltd. SYSTEM AND METHOD FOR SIGNAL DETECTION AT ASYNCHRONOUS DEVICES AND DEVICES WITHOUT TIME FRAME STRUCTURE
CN113728559A (zh) * 2019-04-18 2021-11-30 株式会社Ntt都科摩 用户终端以及无线通信方法
US11239967B2 (en) 2019-05-02 2022-02-01 Qualcomm Incorporated Patterns for reference signals used for positioning in a wireless communications system
US11381298B2 (en) * 2019-06-28 2022-07-05 Qualcomm Incorporated User equipment based beam measurement resource activation
US11716123B2 (en) 2019-10-09 2023-08-01 The Trustees Of Columbia University In The City Of New York Systems, methods, and media for recovering data symbols in multiple-input, multiple-output receivers
US12244417B2 (en) 2019-12-20 2025-03-04 Qualcomm Incorporated Link adaptation protocol in a wireless local area network (WLAN)
WO2021212454A1 (en) * 2020-04-24 2021-10-28 Qualcomm Incorporated New csi report setting to hasten csi feedback for svd-based precoding
US12088378B2 (en) 2020-09-18 2024-09-10 Qualcomm Incorporated Low overhead and high accuracy channel state feedback using neural networks
WO2022079188A1 (en) * 2020-10-16 2022-04-21 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Iterative transmit refinement
KR20220111145A (ko) * 2021-02-01 2022-08-09 삼성전자주식회사 간섭 백색화 동작을 수행하는 무선 통신 장치 및 이의 동작 방법
CN115119243B (zh) * 2021-03-17 2025-11-21 中国移动通信有限公司研究院 一种干扰上报方法、装置和存储介质
CN115550683B (zh) * 2021-06-29 2024-12-20 华为技术有限公司 一种视频数据的传输方法及装置
WO2023277744A1 (en) * 2021-06-30 2023-01-05 Telefonaktiebolaget Lm Ericsson (Publ) Channel modelling
US12438752B2 (en) * 2021-12-17 2025-10-07 Intel Corporation Methods and devices for joint processing in massive MIMO systems
CN116545485A (zh) * 2022-01-26 2023-08-04 大唐移动通信设备有限公司 信号传输方法、装置及存储介质
EP4307624A1 (en) * 2022-07-14 2024-01-17 Nokia Solutions and Networks Oy Whitening uplink data streams
WO2025050954A1 (en) * 2023-09-04 2025-03-13 Mediatek Inc. Method and apparatus for channel information feedback with whitening information in mobile communications
US20250106690A1 (en) * 2023-09-25 2025-03-27 Huawei Technologies Canada Co., Ltd. Methods and system of collaborative link adaptation
WO2025151753A1 (en) * 2024-01-12 2025-07-17 John Mezzalingua Associates, LLC. Base station-centric determination of best beamforming parameters for over-the-air communications with a user device
WO2025212148A1 (en) * 2024-04-04 2025-10-09 Kyocera Corporation Methods, apparatuses and systems for sounding reference signal-based precoder for downlink data multiple-input multiple-output transmissions

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110002406A1 (en) * 2009-07-06 2011-01-06 Futurewei Technologies, Inc. System and Method for Multi-cell Joint Codebook Feedback in Wireless Communications Systems
US20120287770A1 (en) * 2010-01-14 2012-11-15 Panasonic Corporation Wireless communication terminal apparatus, wireless communication base station apparatus and wireless communication method
US20130044685A1 (en) * 2010-02-12 2013-02-21 Research In Motion Limited Reference Signal for a Coordinated Multi-Point Network Implementation
US20140112168A1 (en) * 2012-10-24 2014-04-24 Qualcomm Incorporated Enhanced srs transmission for mimo operation in lte-a

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2008054235A (ja) 2006-08-28 2008-03-06 Matsushita Electric Ind Co Ltd 変調方式判定装置、受信装置、変調方式判定方法及び変調方式判定プログラム
US8463191B2 (en) * 2009-04-02 2013-06-11 Qualcomm Incorporated Beamforming options with partial channel knowledge
EP2727257B1 (en) * 2011-07-01 2015-10-28 Telefonaktiebolaget L M Ericsson (PUBL) Beamforming with phase compensation
US9532362B2 (en) * 2012-06-04 2016-12-27 Interdigital Patent Holdings, Inc. Communicating channel state information (CSI) of multiple transmission points
CN110233652B (zh) * 2012-07-02 2022-03-15 Lg 电子株式会社 在无线通信系统中报告信道状态信息的方法和装置
US9178583B2 (en) * 2013-01-08 2015-11-03 Samsung Electronics Co., Ltd. Channel state information feedback design in advanced wireless communication systems
US9300451B2 (en) * 2013-03-13 2016-03-29 Samsung Electronics Co., Ltd. Transmission of sounding reference signals for adaptively configured TDD communication systems
US10034283B2 (en) 2013-08-23 2018-07-24 Qualcomm Incorporated CSI and ACK reporting enhancements in LTE/LTE-A with unlicensed spectrum
CN104796220A (zh) * 2014-01-21 2015-07-22 株式会社Ntt都科摩 信道状态信息的反馈和交换方法及装置
CN104980247B (zh) * 2014-04-04 2019-11-22 北京三星通信技术研究有限公司 自适应调整调制编码方式和参考信号图样的方法、基站、终端和系统
US10084579B2 (en) 2014-11-17 2018-09-25 Samsung Electronics Co., Ltd. CSI feedback for MIMO wireless communication systems with polarized active antenna array
US10057019B2 (en) 2015-05-08 2018-08-21 Qualcomm Incorporated Media access control (MAC) layer coding and hybrid automatic repeat request (HARQ) for efficient receiver pipeline processing in self-contained time division duplex (TDD) subframe
US10931342B2 (en) 2015-08-13 2021-02-23 Samsung Electronics Co., Ltd. Reference signal measurement method and apparatus for use in mobile communication system
WO2017026860A1 (ko) * 2015-08-13 2017-02-16 삼성전자 주식회사 채널 상태 정보 피드백 방법 및 장치
US10707937B2 (en) * 2016-01-08 2020-07-07 Lg Electronics Inc. Method by which terminal receives downlink signal from base station in wireless communication system, and device therefor
WO2017123276A1 (en) * 2016-01-15 2017-07-20 Intel IP Corporation 5g fdd low latency transmission subframe structure system and method of use
CN109314872B (zh) * 2016-03-28 2021-03-23 苹果公司 无线通信网络中的装置及计算机可读存储介质

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110002406A1 (en) * 2009-07-06 2011-01-06 Futurewei Technologies, Inc. System and Method for Multi-cell Joint Codebook Feedback in Wireless Communications Systems
US20120287770A1 (en) * 2010-01-14 2012-11-15 Panasonic Corporation Wireless communication terminal apparatus, wireless communication base station apparatus and wireless communication method
US20130044685A1 (en) * 2010-02-12 2013-02-21 Research In Motion Limited Reference Signal for a Coordinated Multi-Point Network Implementation
US20140112168A1 (en) * 2012-10-24 2014-04-24 Qualcomm Incorporated Enhanced srs transmission for mimo operation in lte-a

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EP3455949B1 (en) 2022-12-21
TW201743576A (zh) 2017-12-16
US10505597B2 (en) 2019-12-10
JP2019516324A (ja) 2019-06-13
JP6978432B2 (ja) 2021-12-08
CN109075827B (zh) 2021-05-25
WO2017196604A1 (en) 2017-11-16
CA3020227A1 (en) 2017-11-16
CN109075827A (zh) 2018-12-21
US20170324455A1 (en) 2017-11-09
AU2017264574B2 (en) 2022-01-27
AU2017264574A1 (en) 2018-10-25
BR112018072938A2 (pt) 2019-02-19
EP3455949A1 (en) 2019-03-20

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