Andrew Wireless Systems Gmbh

Commscope Technologies LLC

Fraunhofer-gesellschaft Zur Foerderung Der Angewandten Forschung E.v.

Andrew Corporation

Karlsruher Institut Fur Technologie

Oliver Braz

Peter Schmid

Stefan Eisenwinter

Joerg Stefanik

Peter Gunzner

Mathias A Schmalisch

Alfons Dussmann

Thomas Kummetz

Samuele Brighenti

Massimiliano Mini

Harald Langer

Van Erick Hanson

Jorg Stefanik

Thomas Wirth

Thomas Haustein

Luigi Tarlazzi

Gregory Allan Maca

Enrico Maria Fabbri

Marianna Fabbri

Marco Parrucci

Markus Mederle

Dennis Wieruch

Nelson Christian Schmidt

Peter Gunzer

Jaroslav Hoffman

Friedrich Jondral

Holger Jäkel

Jaroslav Hoffmann

Nelson Christian Schmidt, Jr

Marco Parucci

Jörg Stefanik

Mathias Schmalisch

A master unit and a remote unit is provided for a multiband transmission system for distributing and combining signals of at least one wireless communication network and at least one digital network. A reference frequency generator is arranged in the master unit, the reference frequency generator being designed to clock a master modem for converting the signals of the at least one digital network. The reference frequency signal emitted by the reference frequency signal is restored via a reference frequency receiver and is used for closing a remote modem that is located there for demodulation.

Master unit, remote unit and multiband transmission system

In one embodiment, a TDD repeater system comprises: a master unit comprising separate uplink and downlink signal paths defined therein, and configured to couple in an uplink direction to a base station and in a downlink direction to at least one remote antenna unit, wherein the uplink path communicates uplink communication signals, wherein the downlink path communicates downlink communication signals; a switch configured to change direction of signal transmissions within the master unit between the uplink communication signals and the downlink communication signals; a synchronizing unit is configured to receive via the downlink signal path a clock signal from the downlink communication signals, wherein the synchronizing unit supplies a control signal to the switch corresponding to the clock signal; wherein the switch swaps the direction of signal transmissions within the master unit between the uplink communication signals and the downlink communication signals in response to the control signal.

TDD repeater for a wireless network and method for operating said repeater

A method includes: receiving MIMO channel signals at original MIMO frequency from signal source(s) at master unit of DAS, set(s) of the MIMO channel signals including first MIMO channel signal and second MIMO channel signal; generating local oscillator signal at master unit; frequency converting first MIMO channel signal(s) and second MIMO channel signal(s) from original MIMO frequency to different frequency different from first legacy service frequency band using local oscillator signal at master unit; combining first MIMO channel signal, second MIMO channel signal, and local oscillator signal into combined signal at master unit; transmitting combined signal across optical link to remote unit; processing first MIMO channel signal and/or second MIMO channel signal at remote unit; and frequency converting converted MIMO channel signal(s) from different frequency different from first legacy service frequency band back to original MIMO frequency for transmission over antenna(s).

Distributed antenna system for MIMO signals

A distributed antenna system includes at least one master unit communicatively coupled to at least one base station and a plurality of remote units located remotely from the at least one master unit. The plurality of remote units are communicatively coupled to the master unit over at least one transport communication link. The system is configured to distribute uplink and downlink signals between a base station and mobile units. A digital unit generates digital samples indicative of spectrum included in at least one of the uplink and downlink signals. A network interface communicates with an external computer. The digital unit is configured to process the digital samples and communicate information indicative of the spectrum to the external computer via the network interface.

Interface module for a unit of an antenna distribution system, and antenna distribution system

In one embodiment, a repeater for wireless communication is provided. The repeater comprises: circuitry configured to receive first and second MIMO-coded information channels at a first frequency; a converting device configured to convert the first MIMO-coded information channel to a second frequency using information from a test receiver configured to determine unused frequency ranges situated outside frequency bands allocated to mobile radio for wireless communication, the test receiver communicatively coupled with the converting device, the converting device configured to convert the first MIMO-coded information channel to the second frequency in at least one communication direction, the second frequency within the unused frequency ranges situated outside the frequency bands allocated to mobile radio; and circuitry configured to transmit the first and second MIMO-coded information channels in the at least one communication direction, wherein the first and second MIMO-coded information channels are transmitted using different frequencies compared to each other.

Wireless communications network using frequency conversion of MIMO signals

Telecommunication systems using multiple Nyquist zone operations are provided. In one aspect, a telecommunication system can include a first section and a second section. The first section can receive signals from at least one transmitting base station or transmitting terminal device. The received signals have frequencies in multiple frequency bands. The first section can also sample the received signals such that the received signals are aliased. The first section can also combine the aliased signals from the frequency bands into a combined frequency band in a common Nyquist zone. The second section can extract signals from the combined frequency band. The extracted signals are to be transmitted at frequencies in a frequency band from a Nyquist zone that is different than the common Nyquist zone. The second section can also transmit the extracted signals to at least one receiving base station or receiving terminal device. Other embodiments are disclosed.

Telecommunication system using multiple Nyquist zone operations

A distributed antenna system, comprising: master unit configured to: receive MIMO channel signals at MIMO frequency from signal source, MIMO channel signals including first and second MIMO channel signals; generate LO signal; frequency convert first and/or second MIMO channel signal from MIMO frequency to different frequency close to first legacy service frequency band using the LO signal; combine first MIMO channel signal, second MIMO channel signal, and LO signal for transmission; optical link operably coupled with master unit; unit communicatively coupled with master unit via optical link for transceiving first second MIMO channel signal, unit including band processing circuitry configured to process first and second MIMO channel signal; conversion circuitry configured to receive converted MIMO channel signal and to frequency convert converted MIMO channel signal from frequency close to first legacy service frequency band back to MIMO frequency for transmission over antenna.

A repeater () particularly suitable for a time-division duplex transmission of communication signals is provided. The repeater () comprises a master unit () for communicating with a base station () of a wireless network, at least one remote unit () for communicating with a network terminal, as well as a waveguide () connecting the remote unit () with the master unit () for transmitting the communication signals in an uplink direction () from the remote unit () to the master unit () and in a downlink direction () from the master unit () to the remote unit (). Both the master unit () and the remote unit () comprise one switch () each for changing over the signal transmission between uplink direction () and downlink direction (). Both switches () are selected by a synchronizing unit () arranged in the master unit (), the synchronizing unit () being designed for determining a clock pulsing from the communication signal fed to the master unit ()&#x2014;in particular from the base station ()&#x2014;and for supplying a control signal corresponding to this clock pulsing to the switches ().

Communication network () for wireless communication, comprising a base station (), a wireless terminal () and at least one repeater () which is connected between the base station () and the wireless terminal (), the base station () being configured for transmitting and receiving a communication signal on multiple information channels, the terminal () being configured for transmitting and receiving a communication signal on multiple information channels, and the repeater () being configured for receiving, passing through and retransmitting communication signals on multiple information channels, and contains a converting device () for frequency conversion of at least one information channel passed through, a test receiver () being additionally comprised which is configured for determining unused frequency ranges for wireless communication, the test receiver () being connected to the converting device () of the repeater (), the converting device () being configured for carrying out the frequency conversion in at least one communication direction (UL, DL) to a frequency from the unused frequency ranges, and the repeater () being configured for transmitting the communication signal wirelessly with the at least one frequency-converted information channel in the at least one communication direction.

Wireless communication network using frequency conversion of MIMO signals

Telecommunication system using multiple nyquist zone operations

Telecommunication systems using multiple Nyquist zone operations are provided. In one aspect, a telecommunication system can include a first section and a second section. The first section can receive signals from at least one transmitting base station or transmitting terminal device. The received signals have frequencies in multiple frequency bands. The first section can also sample the received signals such that the received signals are aliased. The first section can also combine the aliased signals from the frequency bands into a combined frequency band in a common Nyquist zone. The second section can extract signals from the combined frequency band. The extracted signals are to be transmitted at frequencies in a frequency band from a Nyquist zone that is different than the common Nyquist zone. The second section can also transmit the extracted signals to at least one receiving base station or receiving terminal device.

A distributed antenna system includes a master unit configured to receive at least one set of multiple input multiple output (MIMO) channel signals from at least one signal source. The master unit is configured to frequency convert at least one of the MIMO channel signals to a different frequency from an original frequency, and combine the MIMO channel signals for transmission. An optical link couples the master unit with a unit remote from the master unit for transceiving the MIMO channel signals. Conversion circuitry is configured to frequency convert at least one of the first and second MIMO channel signals from the different frequency back to an original frequency for transmission over an antenna.

An interface module for a unit designed to transmit and/or amplify communication signals inside an antenna distribution system includes a first analog interface for forwarding and receiving communication signals from mobile terminals and a second interface for forwarding and receiving communication signals from the antenna distribution system. A signal path forwards the received communication signals between the first and second interfaces. A controllable digital unit in the signal path is configured for digitizing incoming communication signals to digital signals and converting outgoing communication signals to analog signals. The digital unit is configured to evaluate characteristic signal parameters of the digital communication signals and select a subset of signals from the digital communication signals. The controllable digital unit is further configured for forwarding the selected subset of signals.

A distributed antenna system includes a master unit configured to receive at least one set of multiple input multiple output (MIMO) channel signals from at least one signal source. The master unit is configured to frequency convert at least one of the MIMO channel signals to a different frequency from an original frequency, and combine the MIMO channel signals for transmission. An optical link couples the master unit with a remote for transceiving the MIMO channel signals. The remote unit is configured to receive the MIMO channel signals to be transmitted over antennas and includes an extension port configured to transceive at least one of the MIMO channel signals. An extension unit is coupled to the remote unit and is configured to frequency convert at least one of the first and second MIMO channel signals from the different frequency back to an original frequency for transmission over an antenna.

Growing community of inventors

Monheim, Germany

Oliver Braz