利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

170 条记录 (耗时 0.016 秒)

    TRANSMITTER, RECEIVER, AND TRANSMISSION/RECEPTION SYSTEM
    4.
    发明公开
    TRANSMITTER, RECEIVER, AND TRANSMISSION/RECEPTION SYSTEM 审中-公开
    SENDER; 接收器和发送系统

    公开(公告)号：EP1757216A4

    公开(公告)日：2009-08-05

    申请号：EP05743317

    申请日：2005-05-24

    申请人： PANASONIC CORP

    发明人： OKADA EIJI ,  ASAKAWA Y

    IPC分类号： A61B1/00 ,  A61B1/04 ,  H03J7/06

    CPC分类号： H03J7/065 ,  A61B1/00016 ,  A61B1/00036 ,  A61B1/041 ,  H03J2200/02

    摘要： A transmission/reception system having a transmitter and a receiver can be used in an encapsulated endoscope which can be swallowed into a biological body. The transmitter has a voltage converter for generating voltage according to transmission data, a voltage control oscillator for generating a signal of frequency according to the voltage generated by the voltage converter by non-feedback control, and a first antenna for emitting the signal generated by the voltage control oscillator. The receiver has a second antenna for receiving the signal emitted from the first antenna of the transmitter, a first amplifier for amplifying the signal received by the second antenna, an oscillator for generating a local oscillation signal, a mixer for mixing the signal amplified by the first amplifier with the local oscillation signal and converting the signal amplified by the first amplifier into an intermediate frequency signal, a detector for detecting the intermediate frequency signal, and a control unit for changing the frequency of the local oscillation signal according to the frequency of the received signal so that the intermediate frequency signal has a predetermined frequency. In this transmission/reception system, the transmitter can have a small size and power consumption can be reduced.

    Radio transmission device and method for aligning parameters thereof
    6.
    发明公开
    Radio transmission device and method for aligning parameters thereof 审中-公开
    为参数的设定的无线通信装置和方法，其

    公开(公告)号：EP1215822A1

    公开(公告)日：2002-06-19

    申请号：EP00127720.1

    申请日：2000-12-18

    申请人： Nokia Corporation

    发明人： Burgess, Paul

    IPC分类号： H04B1/40 ,  H04L27/16 ,  H03J7/06 ,  H04B17/00

    CPC分类号： H04L27/1525 ,  H03J7/02 ,  H04B1/40 ,  H04B17/104 ,  H04B17/15 ,  H04L2027/0028 ,  H04L2027/0055 ,  H04L2027/0089

    摘要： The application discloses a radio transmission device (1) for receiving/transmitting of radio packets, comprising a reception means (34) arranged to receive radio signals, a phase locked loop (14) designed to be locked to a multiple of a reference oscillator (8) frequency, a mixing means (4) having its inputs connected to said reception means (34) and said phase locked loop (14), an intermediate frequency filtering means (6) having its input connected to the output of said mixing means (4), a demodulation means (12) connected to the output of the intermediate frequency filtering means (6) and a base band processing means (20) connected to the output of the demodulation means (12). A branch off line is connected between the reference oscillator (8) and the phase locked loop (14), a frequency dividing means (10), releaseably connected to said branch off line to divide the reference frequency of said reference oscillator (8), the output of said frequency dividing means (10) being connected with the input of said intermediate frequency filtering means (6) and said base band processing means (20) being connected to said reference oscillator (8).

    摘要翻译： 应用程序盘松动的无线发送装置（1），用于接收无线数据包/发送，其包含（34）布置成接收无线电信号的接收装置，一个相位锁定设计成锁定环（14），以参考振荡器的倍数（ 8）频率，混合装置（4）具有其输入端连接到所述接收装置（34）和所述锁相环（14）到中间频率滤波装置（6），其输入端连接到所述混合装置的输出（ 4）的解调装置（12）连接到中间频率滤波装置（6）和一个基带处理装置的输出（20）连接到所述解调装置（12）的输出。 截止线的分支连接在基准振荡器（8）和锁相环（14）之间，一个分频装置（10）可释放地连接到所述分支离线以将所述参考振荡器的参考频率（8） 频率把所述装置的输出（10）与所述中间频率滤波装置的输入端（6）和所述基带处理装置（20）被连接到所述参考振荡器（8）连接。

    Automatic frequency control in a Rake receiver
    7.
    发明公开
    Automatic frequency control in a Rake receiver 审中-公开
    在einem Rake-Empfänger中频繁的自动化

    公开(公告)号：EP0989687A2

    公开(公告)日：2000-03-29

    申请号：EP99118633.9

    申请日：1999-09-21

    申请人： Sharp Kabushiki Kaisha

    发明人： Kandala, Srinivas ,  Somayazulu, V. Srinivasa ,  Kowalski, John M. ,  Yamamoto, Hirohiko

    IPC分类号： H04B1/707 ,  H03J7/06

    CPC分类号： H04B1/7115 ,  H04B1/7117

    摘要： A wideband receiver automatic frequency control (AFC) system which combines multipath or diverse antenna signals, before the carrier frequency error is determined, is provided herein. Rather than independently calculating the frequency error of each transmission path, frequency error is calculated after the multipath signals are summed together. Thus, only a single frequency detector circuit is required. The resulting automatic frequency control system has the accuracy of a system which combines the independently calculated frequency errors, with fewer steps of computation required. A method for combining multipath signals to calculate an average AFC frequency error is also provided.

    摘要翻译： 本文提供了在确定载波频率误差之前组合多路径或多种天线信号的宽带接收机自动频率控制（AFC）系统。 不是独立地计算每个传输路径的频率误差，而是在将多路径信号相加在一起之后计算出频率误差。 因此，仅需要单个频率检测器电路。 所产生的自动频率控制系统具有将独立计算的频率误差组合的系统的精度，需要较少的计算步骤。 还提供了组合多径信号以计算平均AFC频率误差的方法。