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公开(公告)号：US20210367564A1
公开(公告)日：2021-11-25
申请号：US16963295
申请日：2018-01-24
摘要： A linearization device (380) is disclosed, which is configured to determine pre-distortion parameters associated with a plurality of non-linear amplifiers (331, 332, 333, 334). Each of the non-linear amplifiers is associated with one of a plurality of transmit antenna elements and with a non-linear transfer function defining an output of the non-linear amplifier based on an input of the non-linear amplifier and based on a reflection signal for the non-linear amplifier, resulting from mutual couplings among the plurality of transmit antenna elements. The linearization device comprises a first port (381), a second port (382), and determination circuitry (383). The first port is configured to receive a plurality of channel coefficients indicative of channel characteristics of a plurality of communication paths between the plurality of non-linear amplifiers and two or more transmit observation receivers (370, 371, 372). Each transmit observation receiver is configured to receive a sum of transmission signals generated by the plurality of non-linear amplifiers and transferred over the communication paths between the plurality of non-linear amplifiers and the transmit observation receiver. The second port is configured to receive the sums of transmission signals from the transmit observation receivers. The determination circuitry is configured to determine the pre-distortion parameters based on the received plurality of channel coefficients, the received sums of transmission signals, and a model of the non-linear transfer functions of the non-linear amplifiers.
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公开(公告)号：US10020574B2
公开(公告)日：2018-07-10
申请号：US15513479
申请日：2014-09-24
IPC分类号： H04B7/06 , H01Q1/52 , H01Q1/24 , H01Q21/08 , H04B7/0456
CPC分类号： H01Q1/523 , H01Q1/246 , H01Q21/08 , H04B7/0456 , H04B7/0469 , H04B7/0613 , H04B7/0615
摘要： The present disclosure relates to an antenna arrangement and a method for radio transmission. The antenna arrangement comprises a pre-coder (310) connected to an antenna array (320). The antenna array (320) comprises a number N of antenna elements ai (321), i=1, 2, . . . , N, each antenna element ai being configured to receive a respective transmit signal component TXi from the pre-coder (310). The pre-coder (310) is configured to receive a number M
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公开(公告)号：US09831931B2
公开(公告)日：2017-11-28
申请号：US15274688
申请日：2016-09-23
发明人： Ulf Gustavsson , Thomas Eriksson
IPC分类号： H04B7/04 , H04B7/06 , H04B1/00 , H04B1/04 , H03M1/06 , H04B1/02 , H04W52/02 , H03M1/66 , H04W88/08
CPC分类号： H04B7/046 , H03F1/02 , H03F3/24 , H03M1/0639 , H03M1/66 , H04B1/0007 , H04B1/02 , H04B1/04 , H04B7/06 , H04B7/0617 , H04B2001/045 , H04W52/0206 , H04W88/08 , Y02D70/00 , Y02D70/1226 , Y02D70/1262 , Y02D70/142 , Y02D70/21 , Y02D70/444
摘要： An antenna arrangement configured for digital beam-forming of a transmit signal comprising; a number N>1 of digital to analog converters, DACs, each of the N DACs being arranged to receive one respective digital transmit signal component, and to convert and output an analog transmit signal component, each of the N DACs having a respective resolution below a resolution required to fulfill a regulatory radio requirement in an interchangeable antenna arrangement arranged for transmission by a single antenna element connected to a single DAC; and N antenna elements, each of the N antenna elements being configured to receive one respective analog transmit signal component and to transmit the analog transmit signal component as part of the digitally beam-formed transmit signal.
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公开(公告)号：US11843408B2
公开(公告)日：2023-12-12
申请号：US17605453
申请日：2019-04-23
IPC分类号： H04B1/12 , H04B1/16 , H04B7/0413 , H04L25/02
CPC分类号： H04B1/123 , H04B1/16 , H04B7/0413 , H04L25/0256
摘要： Using information contained in clipped samples from analog-to-digital (ADC) conversion to improve receiver performance, by, for example, reducing the clipping distortion caused by ADCs due to its data resolution constraints. This provides an advantage over existing solutions, which perform suboptimally because the existing solution discard information in tire clipped samples.
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公开(公告)号：US20190097673A1
公开(公告)日：2019-03-28
申请号：US16083176
申请日：2016-04-05
发明人： Björn Gävert , Göran Nilsson , Robert Lindgren , Thomas Eriksson
摘要： There is provided mechanisms performed by a control device for suppressing interference in a received reception signal in a radio transceiver device. The radio transceiver device is configured to receive the reception signal as a radio reception signal and to generate a radio transmission signal. The radio transmission signal and the radio reception signal occupy at least partly non-overlapping frequency bands. A method comprises obtaining a transmission reference signal based on the radio transmission signal. The method comprises estimating an interference distortion component signal based on the transmission reference signal and on a model of nonlinearity in a radio circuit of the radio transceiver device. The method comprises suppressing interference in the reception signal by combining the reception signal with the distortion component signal.
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公开(公告)号：US20180241451A1
公开(公告)日：2018-08-23
申请号：US15518266
申请日：2014-11-25
发明人： Ulf Gustavsson , Thomas Eriksson
CPC分类号： H04B7/0617 , H01Q21/24 , H04B7/0456 , H04B7/0469
摘要： A transmitter for radio transmission to one or more receivers over a channel described at least in part by a channel matrix H, the transmitter comprising a pre-coder connected to an antenna array via a transmit unit, the antenna array comprising a number M of antenna elements am, m=1, 2, . . . , M, each antenna element am being configured to receive a respective transmit signal component xm from the pre-coder via the transmit unit, the pre-coder being configured to receive a number K
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公开(公告)号：US11211902B2
公开(公告)日：2021-12-28
申请号：US16772313
申请日：2017-12-14
发明人： Ulf Gustavsson , Thomas Eriksson , Christian Fager
摘要： A linearization device (380) is disclosed, which is configured to determine pre-distortion parameters associated with a plurality of non-linear amplifiers (331, 332, 333, 334), each associated with a non-linear amplifier characteristic. The linearization device comprises determination circuitry (383), a first port (381) and a second port (382). The first port is configured to receive a plurality of channel coefficients indicative of channel characteristics of a plurality of communication paths (391, 392, 393, 394) between the plurality of non-linear amplifiers and a transmit observation receiver (370). The second port is configured to receive, from the transmit observation receiver, a sum of transmission signals generated by the plurality of non-linear amplifiers and transferred over the plurality of communication paths. The determination circuitry is configured to determine the pre-distortion parameters based on the received plurality of channel coefficients, the received sum of transmission signals, and a model of the non-linear amplifier characteristics of the non-linear amplifiers. Corresponding arrangement, wireless transmitter node, cloud based server node, method and computer program product are also disclosed.
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公开(公告)号：US10218421B2
公开(公告)日：2019-02-26
申请号：US15518266
申请日：2014-11-25
发明人： Ulf Gustavsson , Thomas Eriksson
IPC分类号： H04B7/06 , H04B7/0456 , H01Q21/24
摘要： A transmitter for radio transmission to one or more receivers over a channel described at least in part by a channel matrix H, the transmitter comprising a pre-coder connected to an antenna array via a transmit unit, the antenna array comprising a number M of antenna elements am, m=1, 2, . . . , M, each antenna element am being configured to receive a respective transmit signal component xm from the pre-coder via the transmit unit, the pre-coder being configured to receive a number K
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公开(公告)号：US11984949B2
公开(公告)日：2024-05-14
申请号：US17611270
申请日：2019-05-17
IPC分类号： H04B7/0456 , H04B7/06
CPC分类号： H04B7/0456 , H04B7/0617
摘要： There is provided mechanisms for beamformed transmission using a precoder. A method is performed by a radio transceiver device. The radio transceiver device comprises hardware. The hardware impacts transmission of signals from the radio transceiver device. The method comprises acquiring channel conditions of a radio propagation channel between the radio transceiver device and at least one other radio transceiver device. The method comprises determining a precoder, in form of a linear precoding matrix, for beamformed transmission towards the at least one other radio transceiver device. The precoder is determined according to the channel conditions and a model of how the hardware impacts the transmission of signals from the radio transceiver device. The method comprises transmitting, using the precoder, a signal towards the at least one other radio transceiver device.
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公开(公告)号：US20190089403A1
公开(公告)日：2019-03-21
申请号：US16083234
申请日：2017-02-14
发明人： Björn Gävert , Mats Rydström , Göran Nilsson , Thomas Eriksson , Robert Lindgren
摘要： There is provided mechanisms performed by a control device for suppressing interference in a received reception signal in a radio transceiver device. The radio transceiver device is configured to receive the reception signal as a radio reception signal and to generate a radio transmission signal. The radio transmission signal and the radio reception signal occupy at least partly non-overlapping frequency bands. A method comprises obtaining a transmission reference signal based on the radio transmission signal. The method comprises estimating an interference distortion component signal based on the transmission reference signal and on a model of nonlinearity in a radio circuit of the radio transceiver device. The method comprises suppressing interference in the reception signal by combining the reception signal with the distortion component signal.
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