DISTORTION COMPENSATING APPARATUS, TRANSMITTER, DISTORTION COMPENSATING METHOD, AND TRANSFER FUNCTION CALCULATING METHOD

DISTORTION COMPENSATING APPARATUS, TRANSMITTER, DISTORTION COMPENSATING METHOD, AND TRANSFER FUNCTION CALCULATING METHOD

An amplifier module is expressed by a model having a first filter that is a linear time-invariant filter for limiting the bandwidth of an input signal, an amplifier unit that amplifies a signal output from the first filter, and a second filter that is a linear time-invariant filter for limiting the...

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Hauptverfasser: FUKUDA EISUKE, DAIDO YOSHIMASA, OISHI YASUYUKI
Format: Patent
Sprache:eng
Schlagworte:
AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator FUKUDA EISUKE
DAIDO YOSHIMASA
OISHI YASUYUKI
description An amplifier module is expressed by a model having a first filter that is a linear time-invariant filter for limiting the bandwidth of an input signal, an amplifier unit that amplifies a signal output from the first filter, and a second filter that is a linear time-invariant filter for limiting the bandwidth of a signal output from the amplifier unit. A memoryless amplifier unit calculates an output from the amplifier module when being memoryless, using AM-to-AM distortion and AM-to-PM distortion of the amplifier unit. A cross-correlation calculating unit calculates a correlation between the signal output from the amplifier module and the output calculated by the memoryless amplifier unit and calculates an estimate of a transfer function of the first filter and the second filter. A distortion compensating unit compensates the input signal based on the estimate of the transfer function and outputs the signal to the amplifier module.
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subjects AMPLIFIERS
BASIC ELECTRONIC CIRCUITRY
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
PHYSICS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title DISTORTION COMPENSATING APPARATUS, TRANSMITTER, DISTORTION COMPENSATING METHOD, AND TRANSFER FUNCTION CALCULATING METHOD
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