DIGITALER DEMODULATOR

PCT No. PCT/JP88/00280 Sec. 371 Date Oct. 13, 1988 Sec. 102(e) Date Oct. 13, 1988 PCT Filed Mar. 17, 1988 PCT Pub. No. WO88/07302 PCT Pub. Date Sep. 22, 1988.A digital demodulation apparatus which has a detector (11) for receiving transmission signals (Sin) modulated under a multivalue quadrature am...

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Hauptverfasser:	MINOWA, MORIHIKO, MACHIDA-SHI TOKYO 194, JP, NAKAMURA, HIROSHI, SAGAMIHARA-SHI KANAGAWA 228, JP, AONO, YOSHIHITO, NASU-GUN TOCHIGI 329-27, JP, IWAMATSU, TAKANORI FUJITSU MURASAKIZUKA RYO, 1OME OTAWARA-SHI TOCHIGI 324, JP, TAKENAKA, SADAO, KOHOKU-KU YOKOHAMA-SHI KANAGAWA 223, JP, FUJINO, NOBUTSUGU FUJITSU DAI 11 NAKAHARA RYO, KAWASAKI-SHI KANAGAWA 211, JP, DAIDOH, YOSHIMASA, ASAHI-KU YOKOHAMA-SHI KANAGAWA 241, JP
Format:	Patent
Sprache:	ger
Schlagworte:	ELECTRIC COMMUNICATION TECHNIQUE ELECTRICITY TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
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Zusammenfassung:	PCT No. PCT/JP88/00280 Sec. 371 Date Oct. 13, 1988 Sec. 102(e) Date Oct. 13, 1988 PCT Filed Mar. 17, 1988 PCT Pub. No. WO88/07302 PCT Pub. Date Sep. 22, 1988.A digital demodulation apparatus which has a detector (11) for receiving transmission signals (Sin) modulated under a multivalue quadrature amplitude modulation method in accordance with a honeycomb signal structure point arrangement. The detector produces I channel and Q channel demodulation signals. The apparatus also includes a discriminator (13) which converts the analog demodulation signals (Sa) to digital demodulation signals (Sd), a memory (21) which successively receives said digital demodulation signals (Sd) and reproduces corresponding original data. The read only memory (21) stores data representatives of the honeycomb signal structure point arrangement, and stores polarity bits (P) and error bits ( epsilon ) of the signal points.