公开(公告)号：EP1551103A1

公开(公告)日：2005-07-06

申请号：EP03748684.2

申请日：2003-10-02

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

发明人： NAKAMURA, Makoto

IPC分类号： H03M13/25 ,  H04L27/18

CPC分类号： H03M13/3983 ,  H03M13/235 ,  H03M13/256 ,  H04L1/0054 ,  H04L1/0059 ,  H04L27/2057 ,  H04L27/2332

摘要： A digital communication device includes: a modulator having encoding means for converting two-dimensional digital information signal into a three-dimensional signal and phase modulation means for modifying the carrier phase in according to the three-dimensional signal; and a demodulator having phase demodulation means for detecting information on the three-dimensional signal from the received phase-modulated wave and demodulation means for deciding the two-dimensional digital information from the information on the three-dimensional signal. The digital communication device has a bit error ratio and an occupied radio band width equivalent to a digital communication device using the conventional QPSK or π /4 shift QPSK and the error correction method and greatly improves the amplitude fluctuation. Moreover, the digital communication device can transmit a signal with a narrower occupied frequency band width while maintaining the same constant envelope characteristic as the GMSK using the conventional error correction code.

摘要翻译： 数字通信装置包括：具有用于将二维数字信息信号转换为三维信号的编码装置的调制器和用于根据三维信号修改载波相位的相位调制装置; 以及解调器，具有用于从接收到的相位调制波检测关于三维信号的信息的相位解调装置和用于根据关于三维信号的信息来确定二维数字信息的解调装置。 数字通信设备具有与使用传统的QPSK或者pi / 4移位QPSK的数字通信设备相当的误比特率和占用的无线电带宽以及纠错方法，并且极大地改善了振幅波动。 此外，数字通信设备可以使用传统的纠错码在保持与GMSK相同的恒定包络特性的同时发送具有较窄占用频带宽度的信号。