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公开(公告)号：US20220006430A1
公开(公告)日：2022-01-06
申请号：US17293676
申请日：2018-11-13
IPC分类号： H03F1/32
摘要： Systems and methods for linearizing a radio system are disclosed. In some embodiments, a radio system comprises an antenna array, transmit branches comprising respective power amplifiers, a predistortion subsystem comprising predistorters for the transmit branches respectively, a receive antenna element, a transmit observation receiver having an input coupled to the receive antenna element, and an adaptor. The predistorters predistort respective transmit signals to provide predistorted transmit signals to the respective transmit branches for transmission via respective active antenna elements in the antenna array. The transmit observation receiver is operable to receive, via the receive antenna element, a combined receive signal due to coupling between the receive antenna element and the active antenna elements. The adaptor is operable to generate a combined reference signal based on the transmit signals and configure predistortion parameters input to the predistorters based on the combined reference signal and the combined receive signal.
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公开(公告)号：US20230137470A1
公开(公告)日：2023-05-04
申请号：US18091668
申请日：2022-12-30
摘要： Systems and methods for linearizing a radio system are disclosed. In some embodiments, a radio system comprises an antenna array, transmit branches comprising respective power amplifiers, a predistortion subsystem comprising predistorters for the transmit branches respectively, a receive antenna element, a transmit observation receiver having an input coupled to the receive antenna element, and an adaptor. The predistorters predistort respective transmit signals to provide predistorted transmit signals to the respective transmit branches for transmission via respective active antenna elements in the antenna array. The transmit observation receiver is operable to receive, via the receive antenna element, a combined receive signal due to coupling between the receive antenna element and the active antenna elements. The adaptor is operable to generate a combined reference signal based on the transmit signals and configure predistortion parameters input to the predistorters based on the combined reference signal and the combined receive signal.
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公开(公告)号：US10355885B2
公开(公告)日：2019-07-16
申请号：US15035645
申请日：2013-11-12
发明人： Björn Gävert , Göran Nilsson
IPC分类号： H04B1/38 , H04L5/16 , H04L25/03 , H04L1/00 , H04B17/336 , H04B17/354 , H04B15/00 , H04L5/00 , H04B1/10 , H04B17/345 , H04B17/318 , H04W28/22
摘要： A method in a fixed point-to-point radio link transceiver, the method comprising the steps of receiving a first signal from a far end transceiver in a first frequency band, and detecting the presence of interference in the received first signal, as well as transmitting a second signal to the far end transceiver. The step of transmitting comprising including, in the second signal, a request to reduce transmission symbol rate in the far end transmitter when interference is detected in the received first signal.
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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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公开(公告)号：US20180026686A1
公开(公告)日：2018-01-25
申请号：US15547552
申请日：2015-02-12
发明人： Markus Gerdin , Björn Gävert , Göran Nilsson
CPC分类号： H04B7/0469 , H04B7/002 , H04B7/10 , H04B17/12
摘要： This disclosure provides a microwave radio transmitter for radio transmission to a microwave radio receiver. The microwave radio transmitter comprises an antenna arrangement and a baseband processing module connected to the antenna arrangement. The antenna arrangement comprises an antenna having a polarization. The baseband processing module is configured to receive a polarization misalignment indication from the microwave radio receiver. The polarization misalignment indication is indicative of a misalignment between the polarization of the antenna and a corresponding polarization of a receive antenna comprised in the microwave radio receiver. The baseband processing module is configured to compensate for polarization misalignment between the antenna and the receive antenna by adjusting the radio transmission based on the polarization misalignment indication.
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公开(公告)号：US20230075873A1
公开(公告)日：2023-03-09
申请号：US17795633
申请日：2020-02-26
发明人： Lars Manholm , Göran Nilsson , Arne Alping
摘要： A method for compensating a movement of an antenna structure having a directive antenna mounted thereto is disclosed. The method comprises obtaining sensor data from a motion sensor, where the sensor data is indicative of the movement of the antenna structure relative to a reference orientation. Moreover, the motion sensor is associated with a set of calibration parameters such that when applied to the obtained sensor data, calibrated sensor data is formed. Further, the method comprises generating a compensation signal at an output for controlling a beam direction of the directive antenna based on the formed calibrated sensor data such that the beam direction is an intended direction of the directive antenna and such that the (unwanted) movement of the antenna structure is compensated. The method further comprises re-calibrating the motion sensor in order to generate a set of calibration coefficients upon either one of an expiry of a predefined time period, a counter reaching a counter threshold, or upon a measured antenna parameter or signal parameter diverging from a parameter range. Once, one of these conditions are fulfilled, the re-calibration is performed by obtaining a received signal strength indication (RSSI) while the beam direction is controlled based on the generated compensation signal, generating the set of calibration coefficients based on the obtained RSSI, and updating the set of calibration parameters for the motion sensor with the determined set of calibration coefficients.
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公开(公告)号：US10171143B2
公开(公告)日：2019-01-01
申请号：US15547552
申请日：2015-02-12
发明人： Markus Gerdin , Björn Gävert , Göran Nilsson
摘要： This disclosure provides a microwave radio transmitter for radio transmission to a microwave radio receiver. The microwave radio transmitter comprises an antenna arrangement and a baseband processing module connected to the antenna arrangement. The antenna arrangement comprises an antenna having a polarization. The baseband processing module is configured to receive a polarization misalignment indication from the microwave radio receiver. The polarization misalignment indication is indicative of a misalignment between the polarization of the antenna and a corresponding polarization of a receive antenna comprised in the microwave radio receiver. The baseband processing module is configured to compensate for polarization misalignment between the antenna and the receive antenna by adjusting the radio transmission based on the polarization misalignment indication.
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公开(公告)号：US11563408B2
公开(公告)日：2023-01-24
申请号：US17293676
申请日：2018-11-13
摘要： Systems and methods for linearizing a radio system are disclosed. In some embodiments, a radio system comprises an antenna array, transmit branches comprising respective power amplifiers, a predistortion subsystem comprising predistorters for the transmit branches respectively, a receive antenna element, a transmit observation receiver having an input coupled to the receive antenna element, and an adaptor. The predistorters predistort respective transmit signals to provide predistorted transmit signals to the respective transmit branches for transmission via respective active antenna elements in the antenna array. The transmit observation receiver is operable to receive, via the receive antenna element, a combined receive signal due to coupling between the receive antenna element and the active antenna elements. The adaptor is operable to generate a combined reference signal based on the transmit signals and configure predistortion parameters input to the predistorters based on the combined reference signal and the combined receive signal.
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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：US09814000B2
公开(公告)日：2017-11-07
申请号：US15034332
申请日：2013-11-12
发明人： Björn Gävert , Göran Nilsson
CPC分类号： H04W52/343 , H04B17/29 , H04W52/245 , H04W52/28
摘要： A method in a fixed point-to-point radio link transceiver. The method comprising the steps of receiving a first signal from a far end transceiver, and detecting receiver overload due to excess power in the received first signal, and also transmitting a second signal to the far end transceiver. The step of transmitting comprising including, in the second signal, a request to reduce transmission power in the far end transceiver when receiver overload is detected.
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