US 12,683,845 B2Granted

Reconfigurable crest factor reduction in a distributed communication system

AssigneeOutdoor Wireless Networks LLC

InventorsSamuele Brighenti, Gabriele Moroni, Massimo Del Prete, Rainer Friedrich, Patrick Braun, Peter Schmid

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Abstract

To provide improvements in crest factor reduction in a distributed communication system, CFR configuration parameters can be determined based on communication signals received from a base station entity and distributed to node(s) of the distributed communication system. CFR engine(s) in the node(s) may perform CFR based on the CFR configuration parameters, and/or may adjust their CFR engine(s) based on signal parameters and/or operating parameters of a power amplifier coupled to a respective CFR engine. Some or all CFR processing may be offloaded from a node and assigned to optical transport card(s) of the system controller based on a processing bandwidth associated with the optical transport card(s).

Claims20

Dependent claims

A distributed communication system, comprising:

a system controller comprising:
a network interface configured to receive communication signals from at least one base station;
at least one processor coupled to the network interface, wherein the at least one processor is configured to:
determine at least one signal parameter of the communication signals;
determine at least one crest factor reduction (CFR) configuration parameter based on the at least one signal parameter;
and
a plurality of nodes communicatively coupled to the system controller, wherein each node of the plurality of nodes comprises a CFR engine configured to implement a CFR process,
wherein the system controller is configured to distribute the at least one CFR configuration parameter to each node by transmitting a transport signal including the at least one CFR configuration parameter to each node,
wherein each node is configured to:
generate a CFR-compensated output signal from the transport signal based on the at least one CFR configuration parameter corresponding to each node;
generate an amplified signal based on the CFR-compensated output signal;
transmit an output signal based on the amplified signal to one or more terminal devices.

9 more elements

A node of a distributed communication system, the node comprising:

a crest factor reduction (CFR) engine configured to receive a digital signal and configured to implement a CFR process with the digital signal to generate a CFR-compensated signal,
a digital-to-analog converter configured to convert the CFR-compensated signal to an analog signal;
and
a power amplifier configured to generate an amplified signal from the analog signal;
and
at least one processor coupled to the CFR engine and the power amplifier, wherein the at least one processor is configured to:
receive one or more of:
at least one operating parameter of the power amplifier;
or
at least one signal parameter of the CFR-compensated signal;
and
adjust a signal clipping threshold of the CFR process based on one or more of:
the at least one operating parameter of the power amplifier and the at least one signal parameter of the CFR-compensated signal,
wherein the node is configured to transmit an output signal based on the amplified signal to one or more terminal devices serviced by the distributed communication system.

11 more elements

A method for reconfiguring a plurality of nodes of a distributed communication system, each node configured to generate a crest factor reduction (CFR)-compensated signal and to transmit an output signal based on the CFR-compensated signal to one or more terminal devices serviced by the distributed communications system, the method comprising:

receiving a communications signal from at least one base station;
determining at least one signal parameter of the communications signal;
determining at least one CFR configuration parameter based on the at least one signal parameter of the communications signal;
distributing the at least one CFR configuration parameter to the plurality of nodes;
generating the CFR-compensated signal with a CFR engine configured to implement a CFR process using the at least one CFR configuration parameter corresponding to each node;
generating an amplified signal based on the CFR-compensated signal;
and
transmitting the output signal based on the amplified signal to the one or more terminal devices.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/482,639Filed 6 Oct 2023
Priority: IT 1020220000206887 Oct 2022
Published: US 2024/0121145 A111 Apr 2024
Granted: 14 Jul 2026
Term ends: Not estimatedThe source records don’t support an estimate.

Classification6 codes

H04L 27/2623
Peak power aspects: reduction thereof by clipping
H04B 10/27
Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing…
H04W 88/085
Access point devices: access point devices with remote components
H04L
Digital communication