DIGITAL COMMUNICATION METHOD AND DIGITAL COMMUNICA

专利名称：DIGITAL COMMUNICATION METHOD AND

DIGITAL COMMUNICATION DEVICE

发明人：NAKAMURA, Makoto申请号：EP03748684.2申请日：20031002公开号：EP1551103A1公开日：20050706

专利附图：

摘要：A digital communication device includes: a modulator having encoding meansfor converting two-dimensional digital information signal into a three-dimensional signaland phase modulation means for modifying the carrier phase in according to the three-

dimensional signal; and a demodulator having phase demodulation means for detectinginformation on the three-dimensional signal from the received phase-modulated waveand demodulation means for deciding the two-dimensional digital information from theinformation on the three-dimensional signal. The digital communication device has a biterror ratio and an occupied radio band width equivalent to a digital communication deviceusing the conventional QPSK or π /4 shift QPSK and the error correction method andgreatly improves the amplitude fluctuation. Moreover, the digital communication devicecan transmit a signal with a narrower occupied frequency band width while maintainingthe same constant envelope characteristic as the GMSK using the conventional errorcorrection code.

申请人：Yokohama TLO Company, Ltd.,Nakamura, Makoto

地址：79-5, Tokiwadai, Hodogaya-ku Yokohama-shi, Kanagawa 240-8501 JP,11-20,Higashitamagawagakuen 1-chome Machida-shi, Tokyo 194-0042 JP

国籍：JP,JP

代理机构：Strehl Schübel-Hopf & Partner

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