利索-全球专利检索

  1. 登录
  2. 注册

搜索结果

19 条记录 (耗时 0.011 秒)

    Code generating method for spread spectrum communication
    1.
    发明公开
    Code generating method for spread spectrum communication 失效
    扩频通信的码生成方法

    公开(公告)号：EP0641109A3

    公开(公告)日：1995-03-15

    申请号：EP94401175.8

    申请日：1994-05-27

    申请人： CANON KABUSHIKI KAISHA

    发明人： Kanda, Tetsuo, c/o Canon Kabushiki Kaisha ,  Saito, Katsuo, c/o Canon Kabushiki Kaisha ,  Myojo, Toshihiko, c/o Canon Kabushiki Kaisha ,  Kato, Ichiro, c/o Canon Kabushiki Kaisha ,  Mochizuki, Norihiro, c/o Canon Kabushiki Kaisha ,  Nago, Hidetada, c/o Canon Kabushiki Kaisha

    IPC分类号： H04L23/02 ,  H04J13/00

    CPC分类号： H04B1/707 ,  H04B1/709

    摘要： A diffusion code generating method for a code division multiplex communication by a spread spectrum system is provided. A receiving apparatus according to the above method receives the signal which was multiplexed by using a plurality of sets of diffusion codes and comprises: a generator to generate a sync code and a plurality of sets of diffusion codes other than the sync code; a correlator to obtain a correlation between a reception signal and the sync code generated from the generator; and a receiver to receive the reception signal on the basis of the plurality of sets of diffusion codes generated from the generator. The generator generates the sync code in a manner such that the cross-correlation values are set to very small values at positions near a code sync point or are enough smaller than the autocorrelation peak of the sync code or are set to very small values at both of or either one of the positions before and after the code sync point.

    摘要翻译： 提供了扩频系统的码分多路复用通信的扩散码生成方法。 根据上述方法的接收设备接收通过使用多组扩散码被多路复用的信号，并且包括：生成器，生成同步码和除了同步码以外的多组扩散码; 相关器，用于获得接收信号与从发生器产生的同步码之间的相关性; 以及接收器，用于基于从发生器产生的多组扩散码来接收接收信号。 发生器产生同步码的方式使得互相关值在码同步点附近的位置被设置为非常小的值，或者足够小于同步码的自相关峰值，或者在两者都被设置为非常小的值 代码同步点之前和之后的位置之一或任一位置。

    Surface acoustic wave device with reflected wave at side edges on waveguide suppressed and communication system using the same
    2.
    发明公开
    Surface acoustic wave device with reflected wave at side edges on waveguide suppressed and communication system using the same 失效
    一种声表面波装置与波导和传输系统与这样的布置的边缘反射波的抑制。

    公开(公告)号：EP0484689A1

    公开(公告)日：1992-05-13

    申请号：EP91117289.8

    申请日：1991-10-10

    申请人： CANON KABUSHIKI KAISHA

    发明人： Egara, Koichi, c/o Canon Kabushiki Kaisha ,  Nakamura, Kenji, c/o Canon Kabushiki Kaisha ,  Mochizuki, Norihiro, c/o Canon Kabushiki Kaisha

    IPC分类号： G06G7/195 ,  H03H9/02

    CPC分类号： H03H9/02787 ,  G06G7/195 ,  H03H9/02842 ,  H03H9/6486

    摘要： A surface acoustic wave device comprises a substrate (21), a plurality of input transducers (22,23) formed on said substrate for generating first and second surface acoustic waves propagating in opposite directions to each other, a plurality of waveguides (24) arranged in a direction orthogonal to the propagating direction of said first and second surface acoustic waves on a region where said first and second surface acoustic waves overlap, each waveguide producing a third surface acoustic wave propagating in a direction (-y) where the waveguides are arranged, with the interaction between the first and second surface acoustic waves, and on at least two of said waveguides, third surface acoustic waves reflected at respective side edges canceling each other, and an output transducer (25) for converting said third surface acoustic waves propagating from the waveguides into an electric signal.

    摘要翻译： 一种表面声波装置包括用于产生第一和第二表面声波在相反的方向上彼此传播的形成在所述基板一基板（21），输入换能器的多个（22,23），波导的多个（24），其布置 在正交于所述第一传播方向与第二表面声波上，其中所述第一和第二表面声波重叠的区域，一个方向上的每个波导在所述波导被布置的方向（-y）产生第三表面声波传播 ，与第一和第二表面声波之间的相互作用，并且在至少两个所述波导，第三表面声波反射respectivement侧边缘的取消海誓山盟，并输出换能器（25），用于将所述第三表面声波传播 从波导成电信号。

    Code generating method for spread spectrum communication
    4.
    发明公开
    Code generating method for spread spectrum communication 失效
    KodierzeugungsverfahrenfürSpreizspektrumübertragung。

    公开(公告)号：EP0641109A2

    公开(公告)日：1995-03-01

    申请号：EP94401175.8

    申请日：1994-05-27

    申请人： CANON KABUSHIKI KAISHA

    发明人： Kanda, Tetsuo, c/o Canon Kabushiki Kaisha ,  Saito, Katsuo, c/o Canon Kabushiki Kaisha ,  Myojo, Toshihiko, c/o Canon Kabushiki Kaisha ,  Kato, Ichiro, c/o Canon Kabushiki Kaisha ,  Mochizuki, Norihiro, c/o Canon Kabushiki Kaisha ,  Nago, Hidetada, c/o Canon Kabushiki Kaisha

    IPC分类号： H04L23/02 ,  H04J13/00

    CPC分类号： H04B1/707 ,  H04B1/709

    摘要： A diffusion code generating method for a code division multiplex communication by a spread spectrum system is provided. A receiving apparatus according to the above method receives the signal which was multiplexed by using a plurality of sets of diffusion codes and comprises: a generator to generate a sync code and a plurality of sets of diffusion codes other than the sync code; a correlator to obtain a correlation between a reception signal and the sync code generated from the generator; and a receiver to receive the reception signal on the basis of the plurality of sets of diffusion codes generated from the generator. The generator generates the sync code in a manner such that the cross-correlation values are set to very small values at positions near a code sync point or are enough smaller than the autocorrelation peak of the sync code or are set to very small values at both of or either one of the positions before and after the code sync point.

    摘要翻译： 提供了一种扩频码生成方法，用于通过扩频系统进行码分复用通信。 根据上述方法的接收装置接收通过使用多组扩散码复用的信号，并且包括：生成器，用于生成除同步码之外的同步码和多组扩散码; 相关器，用于获得从发生器产生的接收信号和同步码之间的相关性; 以及接收器，用于基于从发电机产生的多组扩散码接收接收信号。 发生器以这样的方式产生同步码，使得互相关值在码同步点附近的位置被设置为非常小的值，或者足够小于同步码的自相关峰值，或者被设置为非常小的值 或者代码同步点之前和之后的位置之一。

    Spread spectrum communication apparatus
    8.
    发明公开
    Spread spectrum communication apparatus 失效
    扩频通信设备

    公开(公告)号：EP0717506A2

    公开(公告)日：1996-06-19

    申请号：EP95402795.9

    申请日：1995-12-12

    申请人： CANON KABUSHIKI KAISHA

    发明人： Suzuki, Rie, c/o Canon Kabushiki Kaisha ,  Myojo, Toshihiko, Canon Kabushiki Kaisha ,  Mochizuki, Norihiro, c/o Canon Kabushiki Kaisha

    IPC分类号： H04B1/707

    CPC分类号： H04B1/7075 ,  H04B1/70712

    摘要： A spread spectrum reception apparatus generates a local reference code and a timing signal having 1/2 the period of the reference code are generated. Correlation calculation between a received spread spectrum signal and the local reference code is performed. Upon reception of the correlation calculation result, a peak detector detects a correlation peak signal. The rate of a code generation clock is adjusted in accordance with the phase difference between the timing signal and the correlation peak signal to perform de-spread processing of the received signal.

    摘要翻译： 扩频接收装置产生本地参考码，并且产生具有1/2参考码周期的定时信号。 执行接收的扩频信号和本地参考码之间的相关计算。 在接收到相关计算结果后，峰值检测器检测相关峰值信号。 根据定时信号和相关峰值信号之间的相位差来调整代码生成时钟的速率，以执行接收信号的解扩处理。

    Demodulation apparatus and communication system using the same
    9.
    发明公开
    Demodulation apparatus and communication system using the same 失效
    解调和这个用传输系统。

    公开(公告)号：EP0610858A3

    公开(公告)日：1995-02-08

    申请号：EP94101825.1

    申请日：1994-02-07

    申请人： CANON KABUSHIKI KAISHA

    发明人： Mochizuki, Norihiro, c/o Canon Kabushiki Kaisha

    IPC分类号： H04B1/66 ,  H04K1/02 ,  H04J13/00

    CPC分类号： H04B1/70712

    摘要： A demodulation apparatus and a communication system using the same are disclosed. The apparatus comprises code generation means for generating a reference spread code corresponding to a first signal modulated by a spread code, and a surface acoustic wave element for receiving the first signal and a second signal output from the code generation means, and outputting a demodulated information signal. The surface acoustic wave element comprises a piezoelectric substrate, a first excitation electrode, formed on the piezoelectric substrate, for generating a first surface acoustic wave which propagates in a predetermined direction in accordance with the first signal, a second excitation electrode, formed on the piezoelectric substrate, for generating a second surface acoustic wave which propagates in a direction opposite to the predetermined direction in accordance with the second signal, and an acousto-electric converter, formed between the first and second excitation electrodes on the piezoelectric substrate, for outputting a convolution signal of the first and second signals on the basis of the first and second surface acoustic waves, wherein the acousto-electric converter selectively converts a surface acoustic wave having a wave number twice a wave number of the first and second surface acoustic waves into an electrical signal.