ADAPTIVE EQUALIZATION CIRCUIT, DIGITAL COHERENT RECEIVER, AND ADAPTIVE EQUALIZATION METHOD

ADAPTIVE EQUALIZATION CIRCUIT, DIGITAL COHERENT RECEIVER, AND ADAPTIVE EQUALIZATION METHOD

A circuit includes a calculation circuit configured to calculate a noise power of a predetermined-training-sequence pattern repeatedly included in a first signal input into an adaptive equalizer, based on a second signal obtained by compensating the first signal by a compensation circuit, a channel-...

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Hauptverfasser: OOTA Masato, Sato Masashi, YAMAZAKI MANABU, HATAE KAZUHIKO, KOIZUMI Nobukazu, OHTOMO Yasuo, KATOU TOMOKI, SASAKI Daisuke
Format: Patent
Sprache:eng
Schlagworte:
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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creator OOTA Masato
Sato Masashi
YAMAZAKI MANABU
HATAE KAZUHIKO
KOIZUMI Nobukazu
OHTOMO Yasuo
KATOU TOMOKI
SASAKI Daisuke
description A circuit includes a calculation circuit configured to calculate a noise power of a predetermined-training-sequence pattern repeatedly included in a first signal input into an adaptive equalizer, based on a second signal obtained by compensating the first signal by a compensation circuit, a channel-estimation value based on the second signal, and the predetermined-training-sequence pattern; and an average circuit configured to obtain an average value of estimation values of frequency offsets based on the predetermined-training-sequence pattern having the noise power equal to or smaller than a predetermined power, among estimation values of frequency offsets based on the predetermined-training-sequence pattern, wherein the compensation circuit is configured to compensate a frequency offset of the predetermined-training sequence pattern based on the average value and thereby obtain the second signal, and the adaptive equalizer is configured to perform adaptive-equalization processing of the first signal with a setting value based on the second signal.
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subjects ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
title ADAPTIVE EQUALIZATION CIRCUIT, DIGITAL COHERENT RECEIVER, AND ADAPTIVE EQUALIZATION METHOD
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