TRANSMITTING METHOD AND TRANSMITTING APPARATUS

To perform an ideal nonlinear distortion compensation by eliminating an influence of incompleteness of amplitude delay characteristics or an intrinsic deviation that an amplifier has. A linear distortion compensation coefficient calculation unit (18) estimates linear distortion characteristics cause...

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Bibliographische Detailangaben
1. Verfasser:	KUROKAMI, YUZO
Format:	Patent
Sprache:	eng ; fre ; ger
Schlagworte:	AMPLIFIERS BASIC ELECTRONIC CIRCUITRY ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Beschreibung
Zusammenfassung:	To perform an ideal nonlinear distortion compensation by eliminating an influence of incompleteness of amplitude delay characteristics or an intrinsic deviation that an amplifier has. A linear distortion compensation coefficient calculation unit (18) estimates linear distortion characteristics caused by incompleteness of an analog circuit mainly such as a quadrature modulator (13) or a high output amplifier (14) based on quadrature demodulated signals (I'ch, Q'ch), and calculates and outputs a linear distortion compensation coefficient for compensating for the linear distortion. A linear distortion compensation processing unit (12) performs a predistortion (addition of inverse characteristics of linear distortion characteristics) by adding data of the linear distortion compensation coefficient to baseband signals (Ich, Qch).