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- Nachgewiesen in: USPTO Patent Applications
- Sprachen: English
- Document Number: 20240121145
- Publication Date: April 11, 2024
- Appl. No: 18/482639
- Application Filed: October 06, 2023
- Assignees: CommScope Technologies LLC (Hickory, NC, US)
- Claim: 1. 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.
- Claim: 2. The distributed communication system of claim 1, wherein the distributed communications system is a distributed antenna system (DAS) or a radio access network (RAN).
- Claim: 3. The distributed communication system of claim 1, wherein the system controller includes at least one optical transport card, wherein the system controller is configured to offload at least a portion of CFR processing from at least one node of the plurality of nodes to the at least one optical transport card based on a processing bandwidth of the at least one optical transport card.
- Claim: 4. The distributed communication system of claim 1, wherein the at least one signal parameter includes a type of the communication signals, a bandwidth of the communication signals, an amplitude of the communication signals, a spectrum of the communication signals, or a carrier transmit configuration.
- Claim: 5. The distributed communication system of claim 1, wherein the at least one CFR configuration parameter includes a resampling rate, a signal clipping threshold, or values of one or more CFR coefficients.
- Claim: 6. The distributed communication system of claim 1, wherein each node includes an error vector magnitude (EVM) estimator coupled to the CFR engine and configured to receive a CFR-compensated output signal from the CFR engine, wherein each EVM estimator is configured to measure a signal interference characteristic of the CFR-compensated output signal.
- Claim: 7. The distributed communication system of claim 6, wherein the signal interference characteristic includes at least one of: an error vector magnitude of the CFR-compensated output signal, a signal-interference ratio of the CFR-compensated output signal, or an adjacent channel leakage ratio (ACLR) of the CFR-compensated output signal.
- Claim: 8. The distributed communication system of claim 6, wherein the at least one processor is configured to: receive the signal interference characteristic corresponding to a respective node from the EVM estimator; determine whether the signal interference characteristic is below a threshold value; and reconfigure the at least one CFR configuration parameter transmitted to the respective node when the signal interference characteristic exceeds the threshold value.
- Claim: 9. 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.
- Claim: 10. The node of claim 9, wherein the node is a remote unit or access point of a distributed antenna system.
- Claim: 11. The node of claim 9, wherein to adjust the signal clipping threshold 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 comprises: to determine at least one signal interference characteristic of the CFR-compensated signal based on the at least one signal parameter; to determine whether the at least one signal interference characteristic is below a threshold value; to adjust the signal clipping threshold when the at least one signal interference characteristic exceeds the threshold value.
- Claim: 12. The node of claim 11, wherein the at least one signal interference characteristic includes a signal-to-interference ratio of the CFR-compensated signal or an adjacent channel leakage ratio of the CFR-compensated signal.
- Claim: 13. The node of claim 9, wherein the at least one operating parameter includes at least one of: a peak power of the power amplifier, a peak-to-average power ratio, an operating frequency of the power amplifier, a temperature of the power amplifier, or operating specifications of the power amplifier.
- Claim: 14. The node of claim 9, wherein the at least one signal parameter includes at least one of: a power of the CFR-compensated signal, a signal bandwidth of the CFR-compensated signal, a modulated coding scheme (MCS) for the CFR-compensated signal, an operating band unwanted emissions (OBUE) for the CFR-compensated signal, an error vector magnitude (EVM) of the CFR-compensated signal, or a spectral power density of the CFR-compensated signal.
- Claim: 15. The node of claim 9, wherein the at least one processor is configured to receive at least one CFR configuration parameter and to adjust the signal clipping threshold based on the at least one CFR configuration parameter, wherein the at least one CFR configuration parameter includes at least one of: a resampling rate, a predetermined signal clipping threshold, or values of one or more CFR coefficients.
- Claim: 16. The node of claim 9, wherein the CFR engine comprises a filter, wherein the filter is configured to filter out of band signal components from the CFR-compensated signal and to provide the filtered CFR-compensated signal to the digital-to-analog converter.
- Claim: 17. 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 parameters based on the at least one signal parameter of the communications signal; and distributing the at least one CFR configuration parameter to the plurality of nodes.
- Claim: 18. The method of claim 17, wherein the at least one signal parameter includes a type of the communication signal, a bandwidth of the communication signal, an amplitude of the communication signal, a spectrum of the communication signal, or a carrier transmit configuration.
- Claim: 19. The method of claim 17, wherein the at least one CFR configuration parameter include a resampling rate, a signal clipping threshold, or values of one or more CFR coefficients.
- Claim: 20. The method of claim 17, further comprising: determining at least one signal interference characteristic corresponding to a respective node; determining that the at least one signal interference characteristic is below a threshold value; and reconfiguring the at least one CFR configuration parameter transmitted to the respective node when the at least one signal interference characteristic exceeds the threshold value, wherein the at least one signal interference characteristic includes at least one of: an error vector magnitude of a CFR-compensated output signal generated from the plurality of nodes, or an adjacent channel leakage ratio (ACLR) of the CFR-compensated output signal generated from the plurality of nodes.
- Current International Class: 04
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