Kalman-viterbi joint channel equalizer

In a channel equalizer applicable to a digital television receiver, a forward filter and a backward filter perform filtering to an input signal and a predetermined signal. A Viterbi decoder corrects errors during a transmission procedure in a blind mode. A training symbol storing block stores traini...

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Bibliographic Details
Main Authors KIM SUNG-HOON, AHN CHIETEUK, SIM YONG-HUN, KIM DAE-JIN, KIM SEUNG-WON
Format Patent
LanguageEnglish
Published 16.06.2009
Subjects
BASIC ELECTRONIC CIRCUITRY
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRIC DIGITAL DATA PROCESSING
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
PULSE TECHNIQUE
RESONATORS
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:In a channel equalizer applicable to a digital television receiver, a forward filter and a backward filter perform filtering to an input signal and a predetermined signal. A Viterbi decoder corrects errors during a transmission procedure in a blind mode. A training symbol storing block stores training symbols. An output signal of the Viterbi decoder and symbols are provided to the backward filter in accordance with a blind mode or a training mode. A Kalman gain is calculated in a Kalman gain calculating block and an error signal is calculated by comparing an equalized signal, symbols, and the output signal of the Viterbi decoder with one another. A tap coefficient is updated by using the calculated error signal and the Kalman gain.
Bibliography:Application Number: US20050511916