Nanosemi, Inc.

George Stone, Iv

Yan Li

Helen Haeran Kim

Zohaib Mahmood

Dmitri Fomin

Alexandre Megretski

Kevin Chuang

Gordon Cheung

Shijun Li

Bhupinder S Parhar

Disclosed are implementations, including a method for monitoring a performance of a transmitter in a radio with an adjustable digital predistortion system. The method includes determining a plurality of system characteristics, including determining one or more of, for example, data characterizing an input/output characteristic of a digital predistorter of the system, data characterizing a performance of a crest factor reduction process of the system, data characterizing a quality of a plurality of parameters associated with the digital predistorter, data characterizing an average time delay associated with the system, data characterizing an average gain associated with the system, and/or data characterizing a phase associated with the system. The method further includes comparing one or more of the plurality of system characteristics to respective one or more reference values, and controlling the adjustable digital predistortion system based on a result of the comparing.

Monitoring systems and methods for radios implemented with digital predistortion

Disclosed are crest factor reduction (CFR) implementations that include a method comprising getting communication system data representative of characteristics of a communication system comprising one or more radio transmission bands, and optimizing, based at least in part on the input communication system data, a plurality of updateable parameters that determine respective pulse shapes for one or more pulses as well as other certain algorithm execution parameters for use in the CFR system. Optimizing the plurality of updateable parameters includes iteratively updating the plurality of updateable parameters based on iterative evaluation of a plurality of performance parameters. The method further includes providing the optimized plurality of updateable parameters to configure the crest reduction system for use in processing signals for radio transmission using a pulse subtraction approach applied to one or more signals communicated through the communication system.

Crest factor reduction

Disclosed are methods, systems, devices, apparatus, media, design structures, and other implementations, including a method for crest factor reduction (CFR) processing that includes receiving a first complex-valued sample of a signal for radio transmission, determining a resultant clipped complex-valued sample for the first complex-valued sample, resulting from projection of a second complex-valued sample, associated with the first complex-valued sample, into a selected one of a plurality of different tangent lines that are tangential to a circle representation with a radius h in a complex-valued plane, and processing the signal using the determined clipped complex-valued sample to produce a resultant CFR signal.

Systems and methods for efficient clipping in crest factor reduction processes

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Hollis, NH, United States of America

George Stone, Iv