DEMODULATING EQUIPMENT

PURPOSE:To prevent an error vector resulting from the result of adding in a way of integration for each modulation period from having a specific directivity. CONSTITUTION:The demodulating equipment is provided with a demodulator 2 for quadrature modulation and an adaptive equalizer 3 applying correc...

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Bibliographic Details
Main Author FUNAHASHI KAZUTOSHI
Format Patent
LanguageEnglish
Published 04.12.1992
Subjects
BASIC ELECTRONIC CIRCUITRY
DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TOANOTHER
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:PURPOSE:To prevent an error vector resulting from the result of adding in a way of integration for each modulation period from having a specific directivity. CONSTITUTION:The demodulating equipment is provided with a demodulator 2 for quadrature modulation and an adaptive equalizer 3 applying correction suitable for the state of a signal propagation line to two orthogonal demodulation data being outputs of the demodulator 2, a comparator 4 comparing output data of the equalizer 3 with an ideal data and giving feedback of the result of comparison to the adaptive equalizer 3 as an error vector and an error vector correction device 5 making the correction in matching with an actual reception data at the calculation of the error vector.
Bibliography:Application Number: JP19910124132