Waveform shaping circuit

1. Field of the Invention A small sized digital Nyquist filter having a high processing speed is provided. A delay in a delay element in the digital Nyquist filter is synchronized with a symbol rate of an input signal, and filtering coefficients at respective taps in the filer are sequentially selec...

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Bibliographic Details
Main Authors Nohara, Manabu, Iwai, Tomoaki
Format Patent
LanguageEnglish
Published 20.01.2004
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Summary:1. Field of the Invention A small sized digital Nyquist filter having a high processing speed is provided. A delay in a delay element in the digital Nyquist filter is synchronized with a symbol rate of an input signal, and filtering coefficients at respective taps in the filer are sequentially selected synchronously with a sampling clock in accordance with a predetermined procedure, thereby reducing the number of taps to 1/oversampling number.