JPH0234542B

A FSK code with reduced high frequency content is generated. First through fourth waveforms are provided to a selector which selects one of the four waveforms in accordance with a control signal which, in turn, is generated in accordance with a state indication signal identifying the presently selec...

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Bibliographic Details
Main Authors KOYAMA TOORU, KOIKE SHINICHI, MYAZAKI TOMOHIRO
Format Patent
LanguageEnglish
Published 03.08.1990
Subjects
BASIC ELECTRONIC CIRCUITRY
CODE CONVERSION IN GENERAL
CODING
DECODING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Summary:A FSK code with reduced high frequency content is generated. First through fourth waveforms are provided to a selector which selects one of the four waveforms in accordance with a control signal which, in turn, is generated in accordance with a state indication signal identifying the presently selected one of the four waveforms. A D/A converter converts the selected digital waveform data to an analog waveform signal. First and second of the digital waveform data represent +sin theta and -sin theta , and third and fourth of the digital waveform data represent +f( theta ) and -f( theta , respectively, where wherein 0</= theta </=2 pi and a, b and c are nonzero coefficients.
Bibliography:Application Number: JP19840202033