Patents by Inventor Björn Sihlbom
Björn Sihlbom has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 10680685Abstract: Radio network node and method therein, for communication in a wireless communication system. The radio network node comprises: a plurality of antenna elements, a plurality of transceivers, wherein the plurality of transceivers comprise a first subset of the plurality of transceivers coupled to a first subset of the plurality of antenna elements and a second subset of the plurality of transceivers coupled to a second subset of the plurality of antenna elements; and a controller configured to adjust the first subset of the transceivers to work at a first frequency band, and to adjust the second subset of the transceivers to work at a second frequency band.Type: GrantFiled: March 1, 2019Date of Patent: June 9, 2020Assignee: Huawei Technologies Co., Ltd.Inventors: Mats Högberg, Björn Sihlbom, Ulrik Imberg, Tomas Wilhelmsson, Teijo Henrikki Lehtinen, Yajun Jiang
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Patent number: 10375674Abstract: Radio network node comprises a plurality of antenna sub arrays, forming a multiple antenna array which is configured for beamforming, spatial multiplexing and Multiple Input Multiple Output, MIMO, transmission/reception, and further comprising an antenna base band processing unit and a central base band processing unit. The radio network node further comprises a plurality of antenna active modules, wherein each active antenna module is connected to one of the antenna sub arrays, comprised in the multiple antenna array, and wherein each active antenna module is configured for pre-processing of signals over the respective antenna sub array, before any forwarding of signals is made to the central base band processing unit.Type: GrantFiled: December 23, 2015Date of Patent: August 6, 2019Assignee: Hauwei Technologies Co., Ltd.Inventors: Anders Gustavsson, Björn Sihlbom, Mats Hogberg, Mattias Gustafsson, Martin Alm, Mats Andersson
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Publication number: 20190199414Abstract: Radio network node and method therein, for communication in a wireless communication system. The radio network node comprises: a plurality of antenna elements, a plurality of transceivers, wherein the plurality of transceivers comprise a first subset of the plurality of transceivers coupled to a first subset of the plurality of antenna elements and a second subset of the plurality of transceivers coupled to a second subset of the plurality of antenna elements; and a controller configured to adjust the first subset of the transceivers to work at a first frequency band, and to adjust the second subset of the transceivers to work at a second frequency band.Type: ApplicationFiled: March 1, 2019Publication date: June 27, 2019Inventors: Mats HÖGBERG, Björn SIHLBOM, Ulrik IMBERG, Tomas WILHELMSSON, Teijo Henrikki LEHTINEN, Yajun JIANG
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Patent number: 10277292Abstract: Radio network node and method therein, for communication in a wireless communication system. The radio network node comprises: a plurality of antenna elements, forming an antenna array; a plurality of transceivers, each transceiver coupled to at least one dedicated antenna element of the antenna array; and a controller configured to adjust a first subset of the transceivers to work at a first frequency band, and to adjust a second subset of the transceivers to work at a second frequency band. The first subset of transceivers and the second subset of transceivers (are disjoint and configured to operate at their respective frequency bands simultaneously.Type: GrantFiled: October 27, 2017Date of Patent: April 30, 2019Assignee: Huawei Technologies Co., Ltd.Inventors: Mats Högberg, Björn Sihlbom, Ulrik Imberg, Tomas Wilhelmsson, Teijo Henrikki Lehtinen, Yajun Jiang
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Patent number: 10249961Abstract: Embodiments relate to a transmit device, the transmit device comprising: at least one logical antenna port configured to provide a broadcast component signal; an antenna array having M number of rows and N number of columns of antenna elements; and a processor configured to select Q number of columns among the N number of columns, where Q?N, determine a phase center location (PCL) for the logical antenna port, wherein the phase center location is arranged in a point on a vertical axis (A) located in the Q number of columns, map the logical antenna port on the physical antenna ports of the Q number of columns.Type: GrantFiled: November 29, 2017Date of Patent: April 2, 2019Assignee: Huawei Technologies Co., Ltd.Inventors: Björn Sihlbom, Mattias Gustafsson
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Patent number: 10212715Abstract: Radio network node and method therein, for channel estimation of a channel used for wireless signal communication with a UE. The radio network node comprises a multiple antenna array configured for beamforming, spatial multiplexing and MIMO transmission. The radio network node also comprises a receiver, configured for receiving a first pilot signal from the UE, and a wireless signal from an interferer; and also configured for receiving a second pilot signal from the UE at a determined AoA, filtered by a receiver pre-filter; and a processor configured for spatial analyzing the received signals; and selecting the UE pilot signals; and configured for determining AoA for the selected pilot signals; and furthermore configured for designing a receiver pre-filter, for isolating signals from the AoA; and also further configured for estimating the channel, based on the received second pilot signal.Type: GrantFiled: November 8, 2016Date of Patent: February 19, 2019Assignee: HUAWEI TECHNOLOGIES CO., LTD.Inventor: Björn Sihlbom
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Publication number: 20180324799Abstract: Embodiments of the present invention disclose a radio frame transmission method, including: determining radio frame configuration information, and performing uplink transmission of a radio frame according to the radio frame configuration information, where the radio frame includes at least three special subframes. Correspondingly, the embodiments of the present invention also disclose a wireless network device. With the present invention, a quantity of subframes used for uplink transmission can be increased in the radio frame. Further, a quantity of subframes used for sounding signal sending is increased, and obtaining of a downlink channel state becomes timelier.Type: ApplicationFiled: July 13, 2018Publication date: November 8, 2018Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventors: Yuanjie Li, Per Tengqvist, Björn Sihlbom
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Patent number: 10084522Abstract: Radio network node and method in a radio network node, for wireless communication with a user equipment in a wireless communication system in antenna streams, wherein the radio network node comprises a plurality of antenna elements, forming a multiple antenna array which is configured for massive MIMO transmission. The method comprises beamforming a signal to be transmitted to the user equipment by splitting and phase shifting said signal; detecting a peak of power of one beamformed signal, exceeding a threshold value; manipulating said signal until the peak of power of the signal is lower than said threshold value; and transmitting said signal, to be received by the user equipment.Type: GrantFiled: February 26, 2016Date of Patent: September 25, 2018Assignee: Huawei Technologies Co., Ltd.Inventors: Zixin Zhang, Simon Andersson, Björn Sihlbom
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Publication number: 20180090853Abstract: Embodiments relate to a transmit device, the transmit device comprising: at least one logical antenna port configured to provide a broadcast component signal; an antenna array having M number of rows and N number of columns of antenna elements; and a processor configured to select Q number of columns among the N number of columns, where Q?N, determine a phase centre location (PCL) for the logical antenna port, wherein the phase centre location is arranged in a point on a vertical axis (A) located in the Q number of columns, map the logical antenna port on the physical antenna ports of the Q number of columns.Type: ApplicationFiled: November 29, 2017Publication date: March 29, 2018Inventors: Björn Sihlbom, Mattias Gustafsson
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Publication number: 20180062712Abstract: Radio network node and method therein, for communication in a wireless communication system. The radio network node comprises: a plurality of antenna elements, forming an antenna array; a plurality of transceivers, each transceiver coupled to at least one dedicated antenna element of the antenna array; and a controller configured to adjust a first subset of the transceivers to work at a first frequency band, and to adjust a second subset of the transceivers to work at a second frequency band. The first subset of transceivers and the second subset of transceivers (are disjoint and configured to operate at their respective frequency bands simultaneously.Type: ApplicationFiled: October 27, 2017Publication date: March 1, 2018Inventors: Mats HÖGBERG, Björn SIHLBOM, Ulrik IMBERG, Tomas WILHELMSSON, Teijo Henrikki LEHTINEN, Yajun JIANG
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Publication number: 20170079051Abstract: Radio network node and method therein, for channel estimation of a channel used for wireless signal communication with a UE. The radio network node comprises a multiple antenna array configured for beamforming, spatial multiplexing and MIMO transmission. The radio network node also comprises a receiver, configured for receiving a first pilot signal from the UE, and a wireless signal from an interferer; and also configured for receiving a second pilot signal from the UE at a determined AoA, filtered by a receiver pre-filter; and a processor configured for spatial analysing the received signals; and selecting the UE pilot signals; and configured for determining AoA for the selected pilot signals; and furthermore configured for designing a receiver pre-filter, for isolating signals from the AoA; and also further configured for estimating the channel, based on the received second pilot signal.Type: ApplicationFiled: November 8, 2016Publication date: March 16, 2017Applicant: HUAWEI TECHNOLOGIES CO., LTD.Inventor: Björn SIHLBOM
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Publication number: 20160182136Abstract: Radio network node and method in a radio network node, for wireless communication with a user equipment in a wireless communication system in antenna streams, wherein the radio network node comprises a plurality of antenna elements, forming a multiple antenna array which is configured for massive MIMO transmission. The method comprises beamforming a signal to be transmitted to the user equipment by splitting and phase shifting said signal; detecting a peak of power of one beamformed signal, exceeding a threshold value; manipulating said signal until the peak of power of the signal is lower than said threshold value; and transmitting said signal, to be received by the user equipment.Type: ApplicationFiled: February 26, 2016Publication date: June 23, 2016Inventors: Zixin ZHANG, Simon ANDERSSON, Björn SIHLBOM
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Publication number: 20160128023Abstract: Radio network node comprises a plurality of antenna sub arrays, forming a multiple antenna array which is configured for beamforming, spatial multiplexing and Multiple Input Multiple Output, MIMO, transmission/reception, and further comprising an antenna base band processing unit and a central base band processing unit. The radio network node further comprises a plurality of antenna active modules, wherein each active antenna module is connected to one of the antenna sub arrays, comprised in the multiple antenna array, and wherein each active antenna module is configured for pre-processing of signals over the respective antenna sub array, before any forwarding of signals is made to the central base band processing unit.Type: ApplicationFiled: December 23, 2015Publication date: May 5, 2016Inventors: Anders Gustavsson, Björn Sihlbom, Mats Hogberg, Mattias Gustafsson, Martin Alm, Mats Andersson
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Patent number: 7535298Abstract: The present invention relates to a predistortion signal amplifier arrangement comprising digital predistortion means for predistortion of an input signal, a non-linear power amplifier, a predistortion control arrangement comprising error estimation means for estimating the error produced in the predistorted signal and a predistortion look-up table arrangement, the content in which is updated by the estimation means. The predistortion look-up table arrangement comprises at least two look-up tables, which are updated by said estimation means and said at least two look-up tables have different number of table entries. It further comprises a combiner for combining updated values obtained from said at least two look-up tables into a composite value and said composite value comprises a distortion coefficient which is input to said digital predistortion arrangement for signal predistortion.Type: GrantFiled: September 15, 2004Date of Patent: May 19, 2009Assignee: Telefonaktiebolaget L M Ericsson (Publ)Inventors: Björn Sihlbom, David Dorbeus
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Publication number: 20080074186Abstract: The present invention relates to a predistortion signal amplifier arrangement comprising digital predistortion means for predistortion of an input signal, a non-linear power amplifier, a predistortion control arrangement comprising error estimation means for estimating the error produced in the predistorted signal and a predistortion look-up table arrangement, the content in which is updated by the estimation means. The predistortion look-up table arrangement comprises at least two look-up tables, which are updated by said estimation means and said at least two look-up tables have different number of table entries. It further comprises a combiner for combining updated values obtained from said at least two look-up tables into a composite value and said composite value comprises a distortion coefficient which is input to said digital predistortion arrangement for signal predistortion.Type: ApplicationFiled: September 15, 2004Publication date: March 27, 2008Inventors: Bjoern Sihlbom, Davia Dorbeus