Processing of multi-carrier signals before power amplifier amplification
AssigneeBroadcom Corporation
InventorsSriraman Dakshinamurthy, Robert G. Lorenz, Ming Hu, Derek K. Shaeffer
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Abstract
Embodiments for methods and apparatuses for processing a multi-carrier signal are disclosed. One method includes shaping a frequency spectrum of a multi-carrier transmit signal wherein an amplitude of a plurality of subcarriers of the multi-carrier transmit signal is increased relative to at least one other subcarrier of the multi-carrier transmit signal. The shaped frequency spectrum multi-carrier transmit signal is amplified with a power amplifier, wherein a power level of an output of the power amplifier is greater than a rated power level of the power amplifier.
Claims30
A method of processing a multi-carrier signal, comprising:
- shaping a frequency spectrum of a multi-carrier transmit signal wherein an amplitude of a plurality of subcarriers of the multi-carrier transmit signal is increased relative to at least one other subcarrier of the multi-carrier transmit signal;
- amplifying the shaped frequency spectrum multi-carrier transmit signal with a power amplifier, wherein a power level of an output of the power amplifier is greater than a rated power level of the power amplifier.
A method of processing a multi-carrier signal of a subscriber prior to the multi-carrier signal being amplified by a power amplifier of the subscriber, comprising:
- shaping a frequency spectrum of a multi-carrier transmit signal wherein an amplitude of a plurality of subcarriers of the multi-carrier transmit signal is increased relative to at least one other subcarrier of the multi-carrier transmit signal;
- amplifying the shaped frequency spectrum multi-carrier transmit signal with a power amplifier, wherein a power level of an output of the power amplifier is greater than a rated power level of the power amplifier.
A method of processing a multi-carrier signal, comprising:
- amplitude compressing a time-domain version of the multi-carrier transmit signal;
- filtering the compressed multi-carrier transmit signal;
- amplifying the compressed multi-carrier transmit signal with a power amplifier, wherein a power level of an output multi-carrier signal of the power amplifier is greater than a rated power level of the power amplifier.
A subscriber station, comprising:
- circuitry operative to frequency spectrum shape a multi-carrier transmit signal wherein an amplitude of a plurality of subcarriers of the multi-carrier transmit signal is increased relative to at least one other subcarrier of the multi-carrier transmit signal;
- and
- a power amplifier operative to amplifying the shaped frequency spectrum multi-carrier transmit signal, wherein a power level of an output multi-carrier signal of the power amplifier is greater than a rated power level of the power amplifier.
A transmitter, comprising:
- means for shaping a frequency spectrum of a multi-carrier transmit signal wherein an amplitude of a plurality of subcarriers of the multi-carrier transmit signal is increased relative to at least one other subcarrier of the multi-carrier transmit signal;
- means for amplifying the shaped frequency spectrum multi-carrier transmit signal with a power amplifier, wherein a power level of an output multicarrier signal of the power amplifier is greater than a rated power level of the power amplifier.
Dependencies are inferred from the claim text.