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50 条记录 (耗时 0.016 秒)

    Reduction of peak to average power ratio in MCM systems
    36.
    发明公开
    Reduction of peak to average power ratio in MCM systems 失效
    减少峰值与平均功率在多载波系统中的比例

    公开(公告)号：EP0836303A3

    公开(公告)日：2000-01-12

    申请号：EP97117507.0

    申请日：1997-10-09

    申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： Suzuki, Yasunori ,  Kumagai, Ken ,  Nojima, Toshio

    IPC分类号： H04L27/26

    CPC分类号： H04L27/2614 ,  H04L27/2602

    摘要： In a method for transmission and reception over N transmission channels, the transmitting side performs orthonormal transform processing of N-channel modulated signals so that the resulting transformed output signals have lower cross-correlation, and the transformed N-channel signals are multiplexed and transmitted over the N-channels. At the receiving side, the N-channel received signals are subjected to inverse orthonormal transform processing to obtain N-channel modulated signals, which are demodulated to obtain a digital signal.

    Digital signal detecting method and detector
    37.
    发明公开
    Digital signal detecting method and detector 失效
    Verfahren zum Erfassen eines digitalen Signals und Detektor

    公开(公告)号：EP0774850A2

    公开(公告)日：1997-05-21

    申请号：EP96118227.6

    申请日：1996-11-13

    申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： Suzuki, Yasunori ,  Kumagai, Ken ,  Nojima, Toshio

    IPC分类号： H04L27/00

    CPC分类号： H04L27/0008 ,  H04L27/3881

    摘要： An automatically gin-controlled digital received signal is AD converted to a digital signal, which is subjected to quadrature modulation processing through operation. The quadrature demodulation result is subjected to low-pass filter processing through operation, that is, a digital detection is performed by software processing to change variable in each software processing in accordance with changes in the modulation method of the received signal and in the symbol transmission rate.

    摘要翻译： 自动金发控制的数字接收信号被AD转换成数字信号，通过操作进行正交调制处理。 正交解调结果通过操作进行低通滤波处理，即，通过软件处理执行数字检测，以根据接收信号的调制方法的变化和符号传输中的每个软件处理中的变化来改变变量 率。

    Radio frequency circuit for portable radio communication device
    38.
    发明公开
    Radio frequency circuit for portable radio communication device 失效
    Hochfrequenzschaltungfürein tragbaresFunkgerät

    公开(公告)号：EP0751631A1

    公开(公告)日：1997-01-02

    申请号：EP96110241.5

    申请日：1996-06-25

    申请人： NTT MOBILE COMMUNICATIONS NETWORK INC.

    发明人： Tarusawa, Yoshiaki ,  Nojima, Toshio

    IPC分类号： H04B7/04 ,  H04B1/44

    CPC分类号： H04B1/44 ,  H04B1/48 ,  H04B7/0802

    摘要： Band-pass filters (BPF1, BPF2), and (BPF3) correspond to the reception frequency band for FDD, the transmission band for FDD, and the band for TDD, respectively. An antenna (A1) is used in common for transmission and reception in the FDD and TDD systems. Another antenna (A2) is used for diversity reception in the FDD system. A controller (20) controls switches (SW1) through (SW4). When the FDD system is selected, the reception signal is sent from the antenna (A1) or (A2) through the filter (BPF1) to a reception amplifier (RA), and the transmission signal is sent from the transmission amplifier (TA) through the filter (BPF2) to the antenna (A1). When the TDD system is selected, the reception signal is sent from the antenna (A1) through the filter (BPF3) to the reception amplifier (RA), and the transmission signal is sent from the transmission amplifier (TA) through the filter (BPF3) to the antenna (A1).

    摘要翻译： 带通滤波器（BPF1，BPF2）和（BPF3）分别对应于FDD的接收频带，FDD的发送频带和TDD的频带。 天线（A1）共同用于FDD和TDD系统中的发射和接收。 另一个天线（A2）用于FDD系统中的分集接收。 控制器（20）控制开关（SW1）至（SW4）。 当选择FDD系统时，接收信号从天线（A1）或（A2）通过滤波器（BPF1）发送到接收放大器（RA），并且发送信号从发送放大器（TA）通过 滤波器（BPF2）到天线（A1）。 当选择TDD系统时，接收信号从天线（A1）通过滤波器（BPF3）发送到接收放大器（RA），并且发送信号从发送放大器（TA）通过滤波器（BPF3）发送 ）到天线（A1）。