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1.发明公开
公开(公告)号：EP3410789A1
公开(公告)日：2018-12-05
申请号：EP18173890.7
申请日：2010-10-01
发明人： PELLETIER, Benoit , CAI, Lujing , ZHANG, Hong
CPC分类号： H04W52/34 , H04B7/0413 , H04B7/0465 , H04B7/0615 , H04J13/00 , H04L1/1812 , H04W52/146 , H04W52/367 , H04W52/42 , H04W52/54 , H04W72/0473
摘要： Techniques for transmit power control for multiple antenna transmissions in an uplink are disclosed. A wireless transmit/receive unit (WTRU) generates at least one input stream for transmission and applies a gain factor to each channel. The gain factor is determined based on a reference channel power estimate. The WTRU generates at least two data streams from the input stream for transmission via a plurality of antennas and applies weights to the data streams. The gain factor and/or the weights are controlled such that a transmit power on each antenna is within a maximum allowed value. The WTRU may perform power scaling on a condition that a transmit power on any antenna exceeds the maximum allowed value. The WTRU may scale down an enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH) first before other channels. For multiple E-DCH streams, the WTRU may calculate an E-DPDCH power offset based on an additional power offset factor due to multiple stream transmission.
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公开(公告)号：EP2611045B1
公开(公告)日：2018-11-21
申请号：EP12199168.1
申请日：2012-12-21
CPC分类号： H01Q3/36 , H04B7/0465 , H04B7/0473 , H04B7/0632 , H04B7/0689 , H04B7/10 , H04B17/12
摘要： A transmission system and method for use in a mobile communication network comprising an active antenna arrangement of multiple antennas. The active antenna arrangement comprising several pairs of radiofrequency sub-modules each radiofrequency sub-module including a first phase shifter module , a TRX module and a radiating antenna element and where an dynamic phase offset is applied to one of the sub-modules of each pair, and where the phase offset vector is selected according to the signal quality received by users of the mobile communication network using an algorithm which minimizes the duration of the selection process.
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3.发明授权
公开(公告)号：EP2606579B1
公开(公告)日：2018-10-03
申请号：EP11752385.2
申请日：2011-08-16
发明人： GEIRHOFER, Stefan , GAAL, Peter , MONTOJO, Juan
CPC分类号： H04B7/0417 , H04B7/0465 , H04B7/0478 , H04B7/0634 , H04B7/065
摘要： A method (500) for wireless communications is described, the method comprising receiving (502) multiple feedback aspects of a channel for the wireless communications, determining (504) multiple codewords (W 1 , W 2 ) based on the multiple feedback aspects, determining (506) a final precoding matrix (W) based on the multiple codewords (W 1 , W 2 ), enforcing (508) at least one codebook property in at least one of the final precoding matrix (W) or the multiple codewords (W 1 , W 2 ), wherein enforcing the at least one codebook property comprises quantizing each of the multiple codewords (W 1 , W 2 ) or quantizing the final precoding matrix (W), applying (510) the final precoding matrix (W) to a plurality of spatial streams to form precoded spatial streams and transmitting (512) the precoded spatial streams. Also the corresponding apparatus is described.
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公开(公告)号：EP3203648B1
公开(公告)日：2018-08-15
申请号：EP16154332.7
申请日：2016-02-04
发明人： LI, Qianrui , GRESSET, Nicolas , GESBERT, David , DE KERRET, Paul
IPC分类号： H04B7/024 , H04B7/0413 , H04B7/06 , H04B7/04
CPC分类号： H04B7/024 , H04B7/0413 , H04B7/0465 , H04B7/0626
摘要： For determining parameters for configuring a regularized zero-forcing precoder aiming at being applied for transmitting data from a plurality of transmitters to a plurality of receivers via a MIMO transmission channel in a wireless communication system, and more particularly in a scope of massive MIMO approach, a first phase comprises: obtaining long-term statistics about observations of the MIMO transmission channel, and obtaining a power scaling factors aiming at meeting a power constraint P, by solving an optimization problem as a function of a signal to noise ratio asymptotic expression from the standpoint of each receiver. Then, a second phase comprises: obtaining an estimation of the MIMO transmission channel, and configuring the regularized zero-forcing precoder using the power scaling factors determined in the first phase as well as the obtained estimation of the MIMO transmission channel.
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公开(公告)号：EP3358755A1
公开(公告)日：2018-08-08
申请号：EP18162830.6
申请日：2012-04-18
申请人： Sun Patent Trust
CPC分类号： H04B7/0697 , H04B7/0413 , H04B7/0426 , H04B7/0456 , H04B7/046 , H04B7/0465 , H04B7/0617 , H04B7/0682 , H04B7/0862 , H04J11/0033 , H04L25/0391 , H04W52/42
摘要： A transmission method for transmitting a first modulated signal and a second modulated signal in the same frequency at the same time. Each signal has been modulated according to a different modulation sheme. The transmission method applies precoding on both signals using a fixed precoding matrix, applies different power change to each signal, and regularly changes the phase of at least one of the signals, thereby improving, received data signal quality for a reception device.
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6.发明公开
公开(公告)号：EP3342060A1
公开(公告)日：2018-07-04
申请号：EP16788400.6
申请日：2016-10-24
发明人： COLIN, Frank
CPC分类号： H04B7/0456 , H04B7/0413 , H04B7/0417 , H04B7/0426 , H04B7/0465 , H04B7/0469 , H04B7/0473 , H04B7/0617 , H04B7/0626 , H04B7/0695 , H04B7/088 , H04B17/11 , H04B17/14 , H04L5/0048 , H04L5/14
摘要： A method and apparatus provide equal energy codebooks for antenna arrays with mutual coupling. A plurality of precoders can be received from a codebook in a transmitter having an antenna array. Each precoder of the plurality of precoders can be transformed using a transformation that maps each precoder to equal radiated power to generate transformed precoders. A signal can be received for transmission. A transformed precoder of the plurality of transformed precoders can be applied to the signal to generate a precoded signal for transmission over a physical channel. The precoded signal can be transmitted.
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公开(公告)号：EP3334057A1
公开(公告)日：2018-06-13
申请号：EP18154699.5
申请日：2009-04-28
申请人： Apple Inc.
发明人： TEE, Lai King , SONG, Yi , WANG, Neng
IPC分类号： H04B7/0456 , H04B7/06 , H04B7/0452 , H04B7/04
CPC分类号： H04B7/0456 , H04B7/0452 , H04B7/0465 , H04B7/0469 , H04B7/0478 , H04B7/0639 , H04B7/0695 , H04L25/03828
摘要： The present invention provides for an improved application of signal strength weightings in a SDMA sectorized cellular network. The improved signal strength weightings application is conducted through the improved selection of weightings from a new codebook subset or by the selection of weightings from a larger codebook subset. In a further embodiment, an antenna beam index or bit map can be used to select the best beam(s) in a SDMA sectorized cellular network. In another embodiment, a field or factor in an uplink or downlink transmission packet can designate which directional transmission beam is best suited for the transmission or when the directional transmission beam should be activated.
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公开(公告)号：EP2360853B1
公开(公告)日：2018-05-30
申请号：EP11154002.7
申请日：2011-02-10
发明人： Erell, Adoram , Yellin, Daniel
IPC分类号： H04B7/0417 , H04B7/06 , H04B7/04
CPC分类号： H04B7/0478 , H04B7/0417 , H04B7/0421 , H04B7/0465 , H04B7/0634
摘要： A method includes holding in a receiver a definition of a codebook including precoding matrices, and a definition of multiple sub-codebooks including different respective subsets of the precoding matrices in the codebook. A sub-codebook is selected in coordination with a transmitter, for use in a given time interval or frequency range. A Multiple-Input Multiple-Output (MIMO) signal that is transmitted from the transmitter is received. Feedback is generated in the receiver based on the received MIMO signal. The feedback is indicative of one or more preferred precoding matrices, which are chosen from the selected sub-codebook and which are to be used in precoding subsequent MIMO signals in respective partitions of the given time interval or frequency range. The feedback is transmitted from the receiver to the transmitter.
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公开(公告)号：EP2611044B1
公开(公告)日：2018-05-02
申请号：EP12006727.7
申请日：2012-09-26
发明人： Jalloul, Louay , Hochwald, Bertrand
CPC分类号： H04B7/0465 , H04B7/0617
摘要： Embodiments of a method and apparatus for selecting one of several different power constraints under which sets of complex, beam weights are normalized are described herein. The embodiments of the method and apparatus specifically select the power constraint based on a code rate used to encode information carried by a transmit signal weighted by the sets of complex, beam weights. Appropriate selection of the power constraint can improve the bit error rate (BER) or block error rate (BLER) of the decoded transmit signal at a receiver.
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10.发明授权METHOD FOR DETERMINING BEAMFORMING PARAMETERS IN A WIRELESS COMMUNICATION SYSTEM AND TO A WIRELESS COMMUNICATION SYSTEM 有权确定无线通信系统和无线通信系统中的波束形成参数的方法
公开(公告)号：EP2741429B1
公开(公告)日：2018-04-11
申请号：EP14154729.9
申请日：2012-02-29
IPC分类号： H04B7/04 , H04B7/0413 , H04B7/06 , H04B7/08
CPC分类号： H04B7/0482 , H04B7/0413 , H04B7/0465 , H04B7/0617 , H04B7/0669 , H04B7/0691 , H04B7/0695 , H04B7/0874 , H04B7/088
摘要： A method for determining a beamforming vector or a beamforming channel matrix in a communication system including a transmitting station and a receiving station, and a communication system are described. The transmitting and receiving stations include respective antenna groups and respective codebooks include a plurality of predefined beamforming vectors for the antenna group.
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