US 11,601,158 B2Granted

Reduce, in a receive signal, interference caused by a simultaneous transmit signal in a same frequency band as the receive signal

AssigneeCommScope Technologies LLC

InventorsPhilip M. Wala, Alfons Dussmann, Thomas Kummetz, Massimiliano Mini, Dean Zavadsky

Life of this patent

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Abstract

In an embodiment, a remote antenna unit includes a transmitter, a receiver, an antenna array, and first and second interference circuits. The transmitter is configured to generate at least one transmit signal, and the receiver is configured to process at least one receive signal. The antenna array includes one or more antennas, each of at least one of the one or more antennas coupled to the transmitter and configured to radiate a respective downlink signal in response to a respective one of the at least one transmit signal, and each of at least one of the one or more antennas coupled to the receiver and configured to generate a respective one of the at least one receive signal in response to an uplink signal. And the first and second interference circuits are each coupled to the transmitter and to the receiver and are each configured to reduce interference in each of the at least one receive signal.

Claims29

Dependent claims

A remote antenna unit, comprising:

a first transmitter configured to generate at least one first transmit signal;
a first receiver configured to process at least one receive signal;
a first antenna array including one or more first antennas each coupled to at least one of the first transmitter and the first receiver,
each of at least one of the first antennas configured to radiate a respective downlink signal in response to a respective one of the at least one first transmit signal, and
each of at least one of the first antennas configured to generate a respective one of the at least one receive signal in response to an uplink signal;
and
first and second interference circuits each coupled to the first transmitter and the first receiver and each configured to reduce, in each of the at least one receive signal, interference caused by one or more of the at least one first transmit signal, at least one downlink signal radiated by one of the one or more first antennas, and at least one interfering downlink signal radiated by one of one or more other antennas;
wherein at least one of the first and second interference circuits is configured to receive an analog signal from the first transmitter.

5 more elements

A distributed antenna system, comprising:

a master unit;
and
at least one remote antenna unit coupled to the master unit, each of the at least one remote antenna unit including
a respective transmitter configured to generate at least one transmit signal;
a respective receiver configured to process at least one receive signal;
a respective antenna array including one or more antennas each coupled to at least one of the transmitter and the receiver,
each of at least one of the antennas configured to radiate a respective downlink signal in response to a respective one of the at least one transmit signal, and
each of at least one of the antennas configured to generate a respective one of the at least one receive signal in response to an uplink signal;
and
first and second interference circuits each coupled to the transmitter and the receiver and each configured to reduce, in each of the at least one receive signal, interference caused by one or more of the at least one transmit signal, at least one downlink signal radiated by one of the one or more antennas, and at least one interfering downlink signal radiated by one of one or more other antennas;
wherein at least one of the first and second interference circuits is configured to receive an analog signal from the transmitter.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 17/119,675Filed 11 Dec 2020 · us provisional application
Priority: IT 10202000002220421 Sep 2020
Published: US 2021/0184722 A117 Jun 2021
Granted: 7 Mar 2023
Term ends: Not estimatedThe source records don’t support an estimate.

Classification13 codes

H04B 1/525
Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of…
H01Q 1/523
Reducing the coupling between adjacent antennas: between antennas of an array
H04B 1/123
Neutralising, balancing, or compensation arrangements: using adaptive balancing or compensation means
H04B 1/44
Circuits: transmit/receive switching