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公开(公告)号：WO2023087170A1
公开(公告)日：2023-05-25
申请号：PCT/CN2021/131145
申请日：2021-11-17
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , ZHANG, Hao
Inventor： NILSSON, Magnus , BRAUN, Christian , ZHANG, Hao
IPC: H04B17/14
Abstract: A method is disclosed which is for controlling antenna calibration of an antenna system residing in a wireless communication network. The antenna calibration is for compensation of impairments associated with operation of the antenna system. The method comprises performing over-the-air measurements of the antenna calibration during unused symbols defined by a predetermined pattern of unused symbols, wherein the predetermined pattern of unused symbols comprises unused symbols directly preceding synchronization symbols and/or unused symbols directly following synchronization symbols. For example, the unused symbols of the predetermined pattern of unused symbols may be symbols of slots that comprise one or more synchronization signal blocks (SSB). In some embodiments, the predetermined pattern comprises sequences of consecutive unused symbols. Each sequence of consecutive unused symbols which has a length exceeding a measurement length threshold may comprise one or more measurement opportunities, and each measurement may be performed during a respective measurement opportunity.
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2.发明申请
公开(公告)号：WO2023088550A1
公开(公告)日：2023-05-25
申请号：PCT/EP2021/081969
申请日：2021-11-17
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventor： PUERTA, Rafael , NILSSON, Magnus , FRENGER, Pål
IPC: H04B7/024 , H04B10/2575
Abstract: A method for transmission of DownLink, DL, radio signals in a Distributed Multiple Input Multiple Output, D-MIMO, system of a Radio Access Network, RAN. The D-MIMO system comprises a Central Unit, CU, with Digital Signal Processing, DSP, a first remote radio-head and a second remote radio-head, an analogue optical fronthaul link. The method comprises receiving (500a) a respective first and second UL transmission from the wireless communications device via the respective first and second remote radio-head over the analogue optical fronthaul link. The method further comprises estimating (501a) a respective first and second effective UL channel for signals from the wireless communications device via the first and second remote radio-head based on applying DSP to the respective first and second UL transmission. The method further comprises estimating (503) a respective first and second calibration channel based on applying DSP to a respective first and second reference radio signal transmitted wirelessly between the first remote radio-head and the second remote radio-head. The method further comprises synchronizing (505) a respective first and second DL radio signal from the respective first and second remote radio-head to the wireless communications device by compensating the second DL transmission based on the estimated second effective UL channel, and further based on the estimated first and second calibration channels.
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3.发明申请
公开(公告)号：WO2023085987A1
公开(公告)日：2023-05-19
申请号：PCT/SE2021/051130
申请日：2021-11-11
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventor： CZEGLEDI, Cristian , BAO, Lei , NGUYEN, Sinh , NILSSON, Magnus
IPC: H04B7/0413 , H04B1/7107 , H04B7/08 , H04B7/10
Abstract: A line-of-sight (LOS) multiple-input multiple-output (MIMO) microwave radio link receiver (300) configured for successive interference cancelation (SIC) operation,wherein the receiver (300) comprises a plurality of receiver input ports (310, 320),where the receiver input ports are connected to a pre-detection network (330), configured to perform mutual MIMO interference cancellation for each receiver radio branch, and to output pre-detection signals (331, 333) for two or more symbol streams of the LOS-MIMO receiver,where the pre-detection signals (331, 333) are fed in a SIC sequence to respective information symbol detectors (332, 334) of the symbol streams, where the output of each information symbol detector in the SIC sequence is arranged to be phase shifted (352) and added to pre-detection signals yet to be fed to its respective information symbol detector,where the output of the information symbol detectors of the symbol streams constitutes an output (361, 362) of the LOS MIMO microwave radio link receiver (300).
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公开(公告)号：WO2023083435A1
公开(公告)日：2023-05-19
申请号：PCT/EP2021/081095
申请日：2021-11-09
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventor： INGELHAG, Per , NILSSON, Magnus , LJUNGBRO, Agneta
Abstract: An Antenna-in-Package, (AiP; 100) is provided, including an array antenna (120) with antenna elements (122), control ICs (130), and AiP contacting elements (140). Each antenna element is configured for transmitting radio signals having a first polarization (pi) and receiving radio signals having a second polarization (p2). The antenna elements are arranged equidistantly spaced in a rectangular, planar lattice at a first side (112) of the AiP. The AiP is rectangular, and the lattice is shifted towards a first comer (116a) of the AiP. An AiP pair assembly, an AiP quartet assembly, an AiP multi -assembly (all including two or more such AiPs), a network node, as well as a method of operating such an AiP quartet assembly or AiP multi-assembly, are also provided.
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公开(公告)号：WO2023072749A1
公开(公告)日：2023-05-04
申请号：PCT/EP2022/079356
申请日：2022-10-21
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventor： NILSSON, Magnus , HAGBERG, Hans , ARFWEDSON, Viktor
Abstract: In an Advanced Antenna System, a desired power amplifier, PA, load distribution, which counters the mismatch of active impedance load, is achieved by altering the lengths of routing traces connecting PA outputs and corresponding antenna elements/subarrays. The combined output performance in the beam during active impedance load is then restored to the matched condition performance. This can be visualized as distributing the load impedance more evenly - ideally, on a circle - on a Smith chart.
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Patent Agency Ranking
公开(公告)号：WO2021213679A1
公开(公告)日：2021-10-28
申请号：PCT/EP2020/061527
申请日：2020-04-24
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventor： NILSSON, Magnus , CARLSSON, Torsten , CELANDER, Jan , ISBERG, Martin , JAKOBSSON, Peter , SANDGREN, Magnus
Abstract: A wireless system comprises a controlling node and two or more antenna processing nodes coupled to the controlling node but separated from each other. The controlling node sends (720) a command to a first one of the two or more antenna processing nodes, instructing the first one of the two or more antenna processing nodes to transmit data to a wireless device. This may be preceded by selecting (715) the first one of the antenna processing nodes based on an estimated signal quality metric corresponding to the wireless device for each antenna processing node. In response to a determination by the controlling node that the wireless device has not successfully decoded the data, the controlling node sends (730) a command to a second one of the two or more antenna processing nodes, instructing the second one of the antenna processing nodes to transmit the data to the wireless device.
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公开(公告)号：WO2021213678A1
公开(公告)日：2021-10-28
申请号：PCT/EP2020/061524
申请日：2020-04-24
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventor： NILSSON, Magnus , CARLSSON, Torsten , CELANDER, Jan , ISBERG, Martin , JAKOBSSON, Peter , SANDGREN, Magnus
IPC: H04B7/024
Abstract: A wireless system comprises a controlling node and multiple antenna processing nodes coupled to the controlling node but separated from each other. The controlling node receives (720) first soft bit information from a first antenna processing node, the first soft bit information corresponding to reception of a wireless transmission. Responsive to determining that it cannot decode transmitted bits using the first soft bit information, the controlling node requests (730) and receives (740) second soft bit information from a second antenna processing node, the second soft bit information also corresponding to the first wireless transmission from the wireless device and having been buffered by the second antenna processing node. The controlling node decodes (750) bits from the first wireless transmission using both the first and second soft bit information. The controlling node may then signal the antenna processing nodes that they can discard buffered information for the wireless transmission.
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公开(公告)号：WO2021160571A1
公开(公告)日：2021-08-19
申请号：PCT/EP2021/052994
申请日：2021-02-09
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventor： NILSSON, Magnus , JAKOBSSON, Peter , INGELHAG, Per , WALLIN, Sten
IPC: H04B17/14
Abstract: Methods for determining calibration parameters to correct for frequency responses of one or more dielectric waveguides coupling a control unit to a first antenna node or to a series of antenna nodes that includes the first antenna node. An example method comprises transmitting, via a first dielectric waveguide coupling the control unit to the first antenna node, a radiofrequency (RF) test signal having a signal bandwidth covering a bandwidth of interest. The method further comprises receiving, via a second dielectric waveguide coupling the control unit to the first antenna node, a looped-back version of the transmitted RF test signal, and estimating a first one-way frequency response corresponding to the first (or second) dielectric waveguide, based on the RF test signal and the received loop-back version of the transmitted RF test signal.
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公开(公告)号：WO2019063072A1
公开(公告)日：2019-04-04
申请号：PCT/EP2017/074492
申请日：2017-09-27
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventor： SANDGREN, Magnus , BRESCHEL, Michael , FRENGER, Pål , NILSSON, Magnus
IPC: H04W52/02
Abstract: A method is disclosed for a centralized unit (CU) of a wireless communication network, wherein the CU is associated with each of one or more remote units (RU) of the wireless communication network via a respective communication interface. The CU is adapted to operate in one of a plurality of modes including at least a normal operation mode and a power saving operation mode, and the normal operation mode defines a plurality of functions to be performed by the CU. The method comprises (when the CU is in the normal operation mode) determining that a traffic load associated with the one or more RU fulfills a power saving operation criterion, configuring – via the respective communication interface – each of the RU for autonomous operation, whereby each of the RU is configured to execute at least one of the plurality of functions, and transferring from the normal operation mode to the power saving operation mode. Corresponding method for a remote unit, computer program products, network node, and arrangements for CU and RU, respectively, are also disclosed.
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公开(公告)号：WO2007068547A1
公开(公告)日：2007-06-21
申请号：PCT/EP2006/068546
申请日：2006-11-16
Applicant: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL) , MATTISSON, Sven , NILSSON, Magnus , NYDAHL, Andreas , MATTSSON, Thomas
Inventor： MATTISSON, Sven , NILSSON, Magnus , NYDAHL, Andreas , MATTSSON, Thomas
IPC: H03D7/14
CPC classification number: H03D7/1441 , H03D7/1458 , H03D7/165 , H03D2200/0023 , H03D2200/0084 , H03H19/008
Abstract: A method of providing an input signal to a mixer circuit comprises coupling an output signal from a low-noise amplifier circuit to a mixer input of the mixer circuit via an AC coupling circuit, comprising an inductive of capacitive coupling circuit. For capacitive coupling configurations, a coupling capacitor is configured to have a capacitance value determined as a function of a transconductance sensitivity of the mixer circuit. For balanced output configurations of the low-noise amplifier circuit, matched coupling capacitors are used for coupling the balanced output signals to respective inputs of the mixer circuit. In one embodiment, the mixer circuit comprises a quadrature mixer circuit, which may be in a balanced or double-balanced configuration. In another embodiment, the mixer circuit comprises a four-phase mixer circuit, which may be configured as a balanced four-phase mixer circuit coupled to the low-noise amplifier circuit via inductive or capactive embodiments of the coupling circuit.
Abstract translation: 一种向混频器电路提供输入信号的方法包括通过AC耦合电路将来自低噪声放大器电路的输出信号耦合到混频器电路的混频器输入，该AC耦合电路包括电容耦合电路的电感。 对于电容耦合配置，耦合电容器被配置为具有根据混频器电路的跨导灵敏度确定的电容值。 对于低噪声放大器电路的平衡输出配置，匹配的耦合电容用于将平衡输出信号耦合到混频器电路的相应输入。 在一个实施例中，混频器电路包括正交混频器电路，其可以是平衡或双平衡配置。 在另一个实施例中，混频器电路包括四相混频器电路，其可以被配置为通过耦合电路的感应或上限实施例耦合到低噪声放大器电路的平衡四相混频器电路。
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