Peak power limitation in an amplifier pooling scenario
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Abstract
A method and a device for performing peak power limitation are described. A transmitter stage (14) according to the invention comprises a distributing component (18) for distributing the accumulated power of beams or sectors according to a specific distribution scheme among a plurality of power amplifiers (261. . . 264). The distributing component (18) superimposes two or more digital beam or sector signals to generate combined signals which are individually subjected to peak power limitation. The combined signals are then individually subjected to digital predistortion, converted to analog and upconverted to RF. The upconverted RF signals are individually amplified by the plurality of power amplifiers (261 . . . 264) constituting a power amplifier pool (26).
40 Citations
29 Claims
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1-16. -16. (canceled)
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17. A method of performing peak power limitation in a transmitter stage that includes a power amplifier pool with two or more power amplifiers, comprising:
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superimposing two or more digital beam or sector signals to generate combined signals;
distributing the accumulated power of the beams or sectors according to a specific distribution scheme among the power amplifiers;
individual subjecting the combined signals to peak power limitation in the digital domain prior to conversion to the analog domain; and
,individually amplifying the peak power limited signals in the power. - View Dependent Claims (18, 19, 20, 21, 22, 23)
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24. A transmitter stage for a wireless communications system, comprising:
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a distributing component for distributing the accumulated power of beams or sectors according to a predefined distribution scheme among a plurality of power amplifiers, said distributing component including;
a plurality of signal inputs to receive digital beam or sector signals; and
a plurality of signal outputs to output a combined signal generated by superimposing two or more of the digital beam or sector signals;
peak power limiting components arranged in signal paths behind the signal outputs of the distributing component to limit peak power in the digital domain prior to conversion to the analog domain; and
,a power amplifier pool including individual power amplifiers that are coupled to the peak power limiting components and that amplify the peak power limited signals. - View Dependent Claims (25, 26, 27, 28, 29)
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Specification