Patents Assigned to ANDREW WIRELESS SYSTEMS GMBH
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Patent number: 11190238Abstract: One embodiment is directed to a radio access network (RAN) system comprising a baseband unit (BBU), a plurality of remote radio units, wherein each of the remote radio units is located remotely from the BBU, and an intermediary unit The BBU, the remote radio units, and the intermediary unit are communicatively coupled to each other via a switched Ethernet network. The BBU is configured to transmit downlink fronthaul data to the intermediary unit via the switched Ethernet network. The intermediary unit is configured to receive the downlink fronthaul data from the BBU and simulcast the downlink fronthaul data to the remote radio units via the switched Ethernet network. Each remote radio unit is configured to receive the downlink fronthaul data and generate therefrom at least one downlink radio frequency signal for wireless communication to user equipment (UE) via an associated at least one antenna.Type: GrantFiled: July 15, 2019Date of Patent: November 30, 2021Assignee: Andrew Wireless Systems GmbHInventor: Keld Knut Lange
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Publication number: 20210313934Abstract: Techniques are provided to more accurately determine reflected power, reflection coefficient, and/or voltage standing wave to permit prompt protection of components such as power amplifiers and notify communication system operators. This is accomplished by more accurately determining an amplitude and phase of an output reflected signal at an output port of a bidirectional coupler as a function of the following: an amplitude and a phase of a coupled forward signal coupled into a forward coupled port of the bidirectional coupler; an amplitude and a phase of a coupled reverse signal coupled into a reverse coupled port of the bidirectional coupler; an electrical transmission parameter from an input port of the bidirectional coupler to the forward coupled port; an electrical transmission parameter from the input port to the reverse coupled port; and an electrical transmission parameter from an output port of the bidirectional coupler to the reverse coupled port.Type: ApplicationFiled: June 17, 2021Publication date: October 7, 2021Applicant: Andrew Wireless Systems GmbHInventors: Peter Gunzner, Johannes Steigert, Felix Lübbers, Peter Schmid, Patrick Braun
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Publication number: 20210314893Abstract: The present disclosure describes devices, systems, and methods for synchronizing multiple-input/multiple-output (“MIMO”) signals or other signals in telecommunication systems. Some aspects may involve transmitting signals between a head-end unit and remote units of a telecommunication system. A first delay of a signal path between the head-end unit and a first remote unit of the remote units may be determined to be greater than each delay of signal paths between the head-end unit and other remote units. Based on the first delay, the telecommunication system may be configured to delay transmission of additional signals such that the additional signals are simultaneously transmitted to another unit by either the head-end unit or the remote units.Type: ApplicationFiled: June 15, 2021Publication date: October 7, 2021Applicant: Andrew Wireless Systems GmbHInventor: Van Erick Hanson
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Publication number: 20210258135Abstract: A sequenced transmit muting wideband power amplifier is provided that includes at least one pre-driver stage having at least a first pre-driver and a second pre-driver. A mute switch selectively establishes a communication path between the first and second pre-drivers or couples the second pre-driver to a termination resistor. A pre-driver switch selectively activates/deactivates the first and second pre-drivers. A driver stage is in communication with the pre-driver stage and includes a first driver. A final amplifier stage is in communication with the driver stage and includes at least one second driver. At least one S-NBS switch is configured to selectively activate/deactivate the first driver and second driver. A controller is configured to activate the at least one pre-driver switch, the mute switch, the at least one S-NBS switch to selectively place the amplifier in one of a transmit mode and a mute mode.Type: ApplicationFiled: May 4, 2021Publication date: August 19, 2021Applicant: Andrew Wireless Systems GmbHInventors: Johannes Steigert, Patrick Braun, Milian Reile
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Patent number: 11082015Abstract: Techniques are provided to more accurately determine reflected power, reflection coefficient, and/or voltage standing wave to permit prompt protection of components such as power amplifiers and notify communication system operators. This is accomplished by more accurately determining an amplitude and phase of an output reflected signal at an output port of a bidirectional coupler as a function of the following: an amplitude and a phase of a coupled forward signal coupled into a forward coupled port of the bidirectional coupler; an amplitude and a phase of a coupled reverse signal coupled into a reverse coupled port of the bidirectional coupler; an electrical transmission parameter from an input port of the bidirectional coupler to the forward coupled port; an electrical transmission parameter from the input port to the reverse coupled port; and an electrical transmission parameter from an output port of the bidirectional coupler to the reverse coupled port.Type: GrantFiled: September 3, 2019Date of Patent: August 3, 2021Assignee: Andrew Wireless Systems GmbHInventors: Peter Gunzner, Johannes Steigert, Felix Lübbers, Peter Schmid, Patrick Braun
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Patent number: 11071079Abstract: The present disclosure describes devices, systems, and methods for synchronizing multiple-input/multiple-output (“MIMO”) signals or other signals in telecommunication systems. Some aspects may involve transmitting signals between a head-end unit and remote units of a telecommunication system. A first delay of a signal path between the head-end unit and a first remote unit of the remote units may be determined to be greater than each delay of signal paths between the head-end unit and other remote units. Based on the first delay, the telecommunication system may be configured to delay transmission of additional signals such that the additional signals are simultaneously transmitted to another unit by either the head-end unit or the remote units.Type: GrantFiled: December 15, 2015Date of Patent: July 20, 2021Assignee: Andrew Wireless Systems GmbHInventor: Van E. Hanson
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Patent number: 11032054Abstract: A sequenced transmit muting wideband power amplifier is provided that includes at least one pre-driver stage having at least a first pre-driver and a second pre-driver. A mute switch selectively establishes a communication path between the first and second pre-drivers or couples the second pre-driver to a termination resistor. A pre-driver switch selectively activates/deactivates the first and second pre-drivers. A driver stage is in communication with the pre-driver stage and includes a first driver. A final amplifier stage is in communication with the driver stage and includes at least one second driver. At least one S-NBS switch is configured to selectively activate/deactivate the first driver and second driver. A controller is configured to activate the at least one pre-driver switch, the mute switch, the at least one S-NBS switch to selectively place the amplifier in one of a transmit mode and a mute mode.Type: GrantFiled: September 24, 2019Date of Patent: June 8, 2021Assignee: Andrew Wireless Systems GmbHInventors: Johannes Steigert, Patrick Braun, Milian Reile
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Patent number: 11032726Abstract: A mobile testing system for optimizing wireless coverage in a distributed antenna system is disclosed. In some aspects, the mobile testing system includes a measurement receiver that can determine signal levels for a respective signals communicated via the distributed antenna system. A processing device of the mobile testing system can identify a subset of the signals by decoding a respective identifier encoded in each of the subset of signals. The identifiers specify that the subset of signals is targeted to at least one coverage zone in which the mobile testing system is located. A subset of signal levels is obtained by the measurement receiver that corresponds to each of the subset of signals. The processing device can generate coverage contour data based on the subset of signal levels that describes signal coverage for at least one coverage zone.Type: GrantFiled: June 12, 2014Date of Patent: June 8, 2021Assignee: Andrew Wireless Systems GmbHInventors: Thomas Kummetz, Matthew Thomas Melester, Stefan Eisenwinter, Alfons Dussmann, Markus Gerhard Kalt, Marianna Fabbri
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Publication number: 20210160773Abstract: In an example, a configuration circuit includes a connector and a controller communicatively coupled to the connector via one or more signal lines. The configuration circuit further includes a microcontroller communicatively coupled to the controller via an interface. The configuration circuit further includes a connection detection circuit communicatively coupled to the microcontroller and the one or more signal lines. The connection detection circuit is configured to determine whether communication traffic between the connector and the controller on the one or more signal lines is detected, and output an interrupt signal to the microcontroller in response to detecting communication traffic between the connector and the controller on the one or more signal lines. The microcontroller is configured to instruct the controller to wake from a low-power sleep mode in response to receiving the interrupt signal from the connection detection circuit.Type: ApplicationFiled: November 12, 2020Publication date: May 27, 2021Applicant: Andrew Wireless Systems GmbHInventor: Joachim Griessmeier
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Publication number: 20210099208Abstract: In one example, a system includes a central unit and a plurality of radiating points communicatively coupled to the central unit and located remotely from the central unit. Each respective radiating point includes a detector configured to evaluate uplink signals received from a coverage area of the respective radiating point. The detector is further configured to determine which services of a plurality of services supported by the system are needed and which services of the plurality of services supported by the system are not needed based on the evaluation of the uplink signals. The detector is further configured to send a request, to the central unit, to activate a service determined to be needed.Type: ApplicationFiled: September 16, 2020Publication date: April 1, 2021Applicant: Andrew Wireless Systems GmbHInventors: Florian Krieger, Alfons Dussmann, Daniel Schwab
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Publication number: 20210029564Abstract: In one embodiment, a method for leveling and optimizing a distributed antenna system (DAS) includes determining a position of a test user equipment (UE); identifying one or more remote antenna units (RAUs) of a plurality of RAUs of the DAS in a vicinity of the test UE that contribute to down-link test signals received by the test UE at the position; transmitting downlink test signals from each RAU of the one or more RAUs to the test UE at the position; measuring a signal power of the downlink test signals transmitted from each RAU of the one or more RAUs received by the test UE at the position; and adjusting one or more components of the DAS until a target signal power of the downlink test signals from each RAU of the one or more RAUs for the position is received at the test UE.Type: ApplicationFiled: May 17, 2019Publication date: January 28, 2021Applicant: Andrew Wireless Systems GmbHInventors: Alfred Josef Lupper, Klaus Uwe Rosenschild
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Patent number: 10886964Abstract: 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.Type: GrantFiled: March 25, 2020Date of Patent: January 5, 2021Assignee: Andrew Wireless Systems GmbHInventor: Charles B. Morrison
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Patent number: 10887010Abstract: In one embodiment, a distributed antenna system comprises: at least one master unit; at least one remote antenna unit communicatively coupled via a switch to the master unit by a primary cable and a secondary cable both coupled to the switch, the remote antenna unit comprising a compensating link check module that outputs a control signal to the switch, wherein the switch selects between the primary and secondary cable in response to the control signal; wherein the compensating link check module controls the switch to momentarily select the secondary cable to perform a link check during which the remote unit measures a quality metric of a downlink signal received via the secondary cable; and upon initiation of the link check, the compensating link check module adjusts an attenuation of the downlink signal received on the secondary cable by loading calibration settings for the secondary cable into a compensation attenuator.Type: GrantFiled: February 7, 2020Date of Patent: January 5, 2021Assignee: Andrew Wireless Systems GmbHInventors: Jaroslav Hoffmann, Peter Starek
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Publication number: 20200404529Abstract: Uplink leveling systems and methods for a distribution antenna are provided. An uplink leveling system includes at least one communication path between a base station point of interface and a remote antenna unit. A broadband measurement detector is communicatively coupled to measure signal power in the at least one communication path at the base station point of interface. A signal measurement receiver is communicatively coupled to measure signal power in the at least one communication path. A test signal generator is configured to generate a test signal in the at least one communication path in an uplink. At least one controller is configured to level the communication path in the uplink direction based at least in part on measurements by the broadband measurement detector and the signal measurement receiver in response to the generated test signal by the test signal generator.Type: ApplicationFiled: September 8, 2020Publication date: December 24, 2020Applicant: Andrew Wireless Systems GmbHInventors: Alfred Josef Lupper, Johannes Kroupa, Alfons Dussmann, Bogdan George Mazilu
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Publication number: 20200374981Abstract: In one embodiment a system comprises a master unit configured to receive a base station downlink radio frequency signal and transmit a base station uplink radio frequency signal; and a plurality of remote antenna units each communicatively coupled to the master unit using at least one cable, the remote antenna units each configured to radiate a remote downlink radio frequency signal from at least one antenna and to receive a remote uplink radio frequency signal from the at least one antenna. The master unit comprises a channel selective uplink muting circuit. The master unit receives and monitors uplink transport signals from the remote uplink radio frequency signal to identify one or more channels within the uplink transport signals that are not carrying uplink communications traffic; wherein the channel selective uplink muting circuit selectively mutes channels of the uplink transport signals that are not carrying uplink communications traffic.Type: ApplicationFiled: May 8, 2020Publication date: November 26, 2020Applicant: Andrew Wireless Systems GmbHInventors: Jaroslav Hoffmann, Klaus Peter Möller
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Patent number: 10833780Abstract: Certain aspects are directed to a configuration sub-system for telecommunication systems. The configuration sub-system can include a test signal generator, a power measurement device, at least one additional power measurement device, and a controller. The test signal generator can be integrated into components of a telecommunication system. The test signal generator can provide a test signal to a signal path of the telecommunication system. The power measurement device and the additional power measurement device can respectively be integrated into different components of the telecommunication system. The power measurement device and the additional power measurement device can respectively measure the power of the test signal at different measurement points in the signal path. The controller can normalize signals transmitted via the telecommunication system by adjusting a path gain for the signal path based on measurements from the power measurement device and the additional power measurement device.Type: GrantFiled: July 26, 2016Date of Patent: November 10, 2020Assignee: Andrew Wireless Systems GmbHInventors: Matthew Thomas Melester, Stefan Eisenwinter, Ahmed H. Hmimy, Massimiliano Mini, Joerg Stefanik, Alfons Dussmann
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Patent number: 10823210Abstract: A self-locking front panel is provided that includes a base plate and first and second retaining members. The first retaining member extends from a back side of the base plate and terminates in a first retaining portion. The first retaining portion has a first rounded portion that bulges out in a direction of a first end edge of the base plate. The second retaining member also extends from the back side of the base plate a select distance from the first retaining member. The second retaining member terminates in a second retaining portion. The second retaining portion has a second rounded portion that bulges out in a direction of a second end edge of the base plate. The first and second retaining members are made of a resilient material that flexes under a load and returns to an original position when the load is removed. Other embodiments are disclosed.Type: GrantFiled: February 20, 2018Date of Patent: November 3, 2020Assignee: Andrew Wireless Systems GmbHInventor: Dieter Schiele
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Patent number: 10819385Abstract: 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.Type: GrantFiled: February 3, 2020Date of Patent: October 27, 2020Assignee: Andrew Wireless Systems GmbHInventors: Charles B. Morrison, Gregory Allan Maca
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Patent number: 10805818Abstract: Uplink leveling systems and methods for a distribution antenna are provided. An uplink leveling system includes at least one communication path between a base station point of interface and a remote antenna unit. A broadband measurement detector is communicatively coupled to measure signal power in the at least one communication path at the base station point of interface. A signal measurement receiver is communicatively coupled to measure signal power in the at least one communication path. A test signal generator is configured to generate a test signal in the at least one communication path in an uplink. At least one controller is configured to level the communication path in the uplink direction based at least in part on measurements by the broadband measurement detector and the signal measurement receiver in response to the generated test signal by the test signal generator.Type: GrantFiled: January 17, 2018Date of Patent: October 13, 2020Assignee: Andrew Wireless Systems GmbHInventors: Alfred Lupper, Johannes Kroupa, Alfons Dussmann, Bogdan Mazilu
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Publication number: 20200322036Abstract: A local roaming cell system for a mobile communication coverage area is disclosed. The system comprises: a RF head end that communicates with a plurality of base stations via a plurality of wireless RF communication links, wherein the plurality of base stations are outside of the coverage area; a conversion and link aggregation circuit that demodulates and processes downlink base station signals associated with at least two of the plurality of base stations by link aggregation to obtain a downlink signal comprising communications data extracted from the downlink base station signals; a roaming base station that modulates portions of the downlink signal to provide a local communication cell within in the coverage area to a plurality of user terminals. A first of the user terminals communicates via the roaming base station with a different one of the plurality of base stations than a second of user terminals.Type: ApplicationFiled: June 17, 2020Publication date: October 8, 2020Applicant: Andrew Wireless Systems GmbHInventors: Alfons Dussmann, Thomas Kummetz, Stefan Eisenwinter