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公开(公告)号：US10819385B2
公开(公告)日：2020-10-27
申请号：US16780441
申请日：2020-02-03
摘要： A telecommunications system may include a distortion cancellation subsystem for use with a circulator device coupling an antenna to a transmit path and a receive path. The distortion cancellation subsystem may include a correction circuit and a cancellation circuit. In some aspects, the correction circuit may include a processing device or adaptive filter to correct imperfections in transmit signal samples generated by directional couplers. The correction circuit may also include a summing device to remove receive signal components from the transmit signal samples. The cancellation circuit may receive the output signal of the correction circuit via an adaptive filter. The output of the adaptive filter may be summed with a receive signal to minimize distortion of the receive signal.
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公开(公告)号：US20200177227A1
公开(公告)日：2020-06-04
申请号：US16780441
申请日：2020-02-03
摘要： A telecommunications system may include a distortion cancellation subsystem for use with a circulator device coupling an antenna to a transmit path and a receive path. The distortion cancellation subsystem may include a correction circuit and a cancellation circuit. In some aspects, the correction circuit may include a processing device or adaptive filter to correct imperfections in transmit signal samples generated by directional couplers. The correction circuit may also include a summing device to remove receive signal components from the transmit signal samples. The cancellation circuit may receive the output signal of the correction circuit via an adaptive filter. The output of the adaptive filter may be summed with a receive signal to minimize distortion of the receive signal.
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公开(公告)号：US20200228157A1
公开(公告)日：2020-07-16
申请号：US16829982
申请日：2020-03-25
发明人： Charles B. Morrison
摘要： A telecommunications system can include analog-to-digital converters in an uplink communication path or a downlink communication path. The analog-to-digital converters can have a high dynamic range and bandwidth to obviate a need for down-conversion of signals using an analog mixer. The uplink communication path and the downlink communication path can be coupled to an antenna using a non-duplexer coupling device. Uplink signals traversing the uplink communication path can be isolated from downlink signals independent of using a duplexer.
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公开(公告)号：US10886964B2
公开(公告)日：2021-01-05
申请号：US16829982
申请日：2020-03-25
发明人： Charles B. Morrison
摘要： A telecommunications system can include analog-to-digital converters in an uplink communication path or a downlink communication path. The analog-to-digital converters can have a high dynamic range and bandwidth to obviate a need for down-conversion of signals using an analog mixer. The uplink communication path and the downlink communication path can be coupled to an antenna using a non-duplexer coupling device. Uplink signals traversing the uplink communication path can be isolated from downlink signals independent of using a duplexer.
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公开(公告)号：US20180191397A1
公开(公告)日：2018-07-05
申请号：US15579181
申请日：2015-09-25
发明人： Charles B. Morrison
摘要： A telecommunications system can include analog-to-digital converters in an uplink communication path or a downlink communication path. The analog-to-digital converters can have a high dynamic range and bandwidth to obviate a need for down-conversion of signals using an analog mixer. The uplink communication path and the downlink communication path can be coupled to an antenna using a non-duplexer coupling device. Uplink signals traversing the uplink communication path can be isolated from downlink signals independent of using a duplexer.
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公开(公告)号：US10715220B2
公开(公告)日：2020-07-14
申请号：US16511253
申请日：2019-07-15
发明人： Charles B. Morrison
摘要： One embodiment is directed to a multiple input, multiple output (“MIMO”) telecommunications system comprising a plurality of signal paths. The system further comprises mixers located in the plurality of signal paths, the mixers being coupled to oscillators for producing a plurality of signals occupying non-overlapping frequency bands and representative of wireless signals. The system further comprises a summer coupled to the plurality of signal paths for summing the plurality of signals to form summed signals. The system further comprises a shared analog-to-digital converter for converting the summed signals to digital signals.
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公开(公告)号：US10554245B2
公开(公告)日：2020-02-04
申请号：US15568328
申请日：2015-12-08
摘要： A telecommunications system may include a distortion cancellation subsystem for use with a circulator device coupling an antenna to a transmit path and a receive path. The distortion cancellation subsystem may include a correction circuit and a cancellation circuit. In some aspects, the correction circuit may include a processing device or adaptive filter to correct imperfections in transmit signal samples generated by directional couplers. The correction circuit may also include a summing device to remove receive signal components from the transmit signal samples. The cancellation circuit may receive the output signal of the correction circuit via an adaptive filter. The output of the adaptive filter may be summed with a receive signal to minimize distortion of the receive signal.
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公开(公告)号：US20190341971A1
公开(公告)日：2019-11-07
申请号：US16511253
申请日：2019-07-15
发明人： Charles B. Morrison
摘要： One embodiment is directed to a multiple input, multiple output (“MIMO”) telecommunications system comprising a plurality of signal paths. The system further comprises mixers located in the plurality of signal paths, the mixers being coupled to oscillators for producing a plurality of signals occupying non-overlapping frequency bands and representative of wireless signals. The system further comprises a summer coupled to the plurality of signal paths for summing the plurality of signals to form summed signals. The system further comprises a shared analog-to-digital converter for converting the summed signals to digital signals.
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公开(公告)号：US20180138938A1
公开(公告)日：2018-05-17
申请号：US15568328
申请日：2015-12-08
摘要： A telecommunications system may include a distortion cancellation subsystem for use with a circulator device coupling an antenna to a transmit path and a receive path. The distortion cancellation subsystem may include a correction circuit and a cancellation circuit. In some aspects, the correction circuit may include a processing device or adaptive filter to correct imperfections in transmit signal samples generated by directional couplers. The correction circuit may also include a summing device to remove receive signal components from the transmit signal samples. The cancellation circuit may receive the output signal of the correction circuit via an adaptive filter. The output of the adaptive filter may be summed with a receive signal to minimize distortion of the receive signal.
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