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57 条记录 (耗时 0.038 秒)

    Reception circuit
    5.
    发明授权
    Reception circuit 有权
    接收电路

    公开(公告)号：US08681913B2

    公开(公告)日：2014-03-25

    申请号：US13295052

    申请日：2011-11-12

    申请人： Naohisa Takayama ,  Ryoji Hayashi ,  Hiroyuki Joba ,  Morishige Hieda

    发明人： Naohisa Takayama ,  Ryoji Hayashi ,  Hiroyuki Joba ,  Morishige Hieda

    IPC分类号： H03D1/00

    CPC分类号： H04L7/042

    摘要： A reception circuit is provided which can detect the beginning of data regardless of a preamble or a unique word contained or not in a received signal and regardless of coding systems for received signals. The reception circuit includes a correlation operation portion that performs a correlation operation to generate a correlation signal while sliding one symbol of reference signal in relation to a received signal. The reference signal goes to a high level during a first half symbol period and goes to a low level during a second half symbol period. The reception circuit further includes: a delay portion that outputs a delay signal by delaying the received signal for a half symbol period in relation to the received signal; and a data beginning timing detection portion that detects a beginning peak timing for the correlation signal as a beginning timing of data contained in the delay signal.

    摘要翻译： 提供了一种可以检测数据开始的接收电路，而不管前置码或包含或不包含在接收信号中的唯一字，而不管接收信号的编码系统如何。 接收电路包括相关操作部分，其执行相关操作以产生相关信号，同时相对于接收信号滑动参考信号的一个符号。 参考信号在第一半符号周期期间进入高电平，并且在后半个符号周期期间变为低电平。 接收电路还包括：延迟部分，通过相对于所接收的信号延迟接收信号半个符号周期来输出延迟信号; 以及数据开始定时检测部分，其将相关信号的开始峰值定时检测为包含在延迟信号中的数据的开始定时。

    RECEPTION CIRCUIT
    6.
    发明申请
    RECEPTION CIRCUIT 有权
    接收电路

    公开(公告)号：US20120128106A1

    公开(公告)日：2012-05-24

    申请号：US13295052

    申请日：2011-11-12

    申请人： Naohisa TAKAYAMA ,  Ryoji Hayashi ,  Hiroyuki Joba ,  Morishige Hieda

    发明人： Naohisa TAKAYAMA ,  Ryoji Hayashi ,  Hiroyuki Joba ,  Morishige Hieda

    IPC分类号： H04L27/06

    CPC分类号： H04L7/042

    摘要： A reception circuit is provided which can detect the beginning of data regardless of a preamble or a unique word contained or not in a received signal and regardless of coding systems for received signals. The reception circuit includes a correlation operation portion that performs a correlation operation to generate a correlation signal while sliding one symbol of reference signal in relation to a received signal. The reference signal goes to a high level during a first half symbol period and goes to a low level during a second half symbol period. The reception circuit further includes: a delay portion that outputs a delay signal by delaying the reference signal for a half symbol period in relation to the received signal; and a data beginning timing detection portion that detects a beginning peak timing for the correlation signal as a beginning timing of data contained in the delay signal.

    摘要翻译： 提供了一种可以检测数据开始的接收电路，而不管前置码或包含或不包含在接收信号中的唯一字，而不管接收信号的编码系统如何。 接收电路包括相关操作部分，其执行相关操作以产生相关信号，同时相对于接收信号滑动参考信号的一个符号。 参考信号在第一半符号周期期间进入高电平，并且在后半个符号周期期间变为低电平。 接收电路还包括：延迟部分，通过相对于所接收的信号将参考信号延迟半符号周期来输出延迟信号; 以及数据开始定时检测部分，其将相关信号的开始峰值定时检测为包含在延迟信号中的数据的开始定时。

    Leakage signal cancellation apparatus
    8.
    发明授权
    Leakage signal cancellation apparatus 有权
    泄漏信号消除装置

    公开(公告)号：US07899142B2

    公开(公告)日：2011-03-01

    申请号：US12065808

    申请日：2006-07-28

    申请人： Ryoji Hayashi ,  Naohisa Takayama ,  Mitsuhiro Shimozawa

    发明人： Ryoji Hayashi ,  Naohisa Takayama ,  Mitsuhiro Shimozawa

    IPC分类号： H03D1/04 ,  H03D1/06 ,  H03K5/01 ,  H03K6/04 ,  H04B1/10 ,  H04L1/00 ,  H04L25/08

    CPC分类号： H04B1/525 ,  G01S7/038

    摘要： A quadrature modulator divides a part of a transmitted signal to generate a cancel signal. A signal comparator compares the amplitude and phase of the cancel signal which is generated by the quadrature modulator with those of a received signal, and outputs signals corresponding to the comparison results to the quadrature modulator. The quadrature modulator generates the cancel signal on the basis of the output signals of the signal comparator, and these components perform feedback control such that the cancel signal has the same amplitude as the leakage signal and is in phase with the leakage signal. A combiner combines the cancel signal with an antiphase cancel signal, which is made to be in opposite phase with the cancel signal outputted from the quadrature modulator, to cancel out the leakage signal.

    摘要翻译： 正交调制器分割发送信号的一部分以产生消除信号。 信号比较器将由正交调制器产生的取消信号的幅度和相位与接收信号的幅度和相位进行比较，并将与比较结果相对应的信号输出到正交调制器。 正交调制器基于信号比较器的输出信号产生消除信号，并且这些分量执行反馈控制，使得消除信号具有与泄漏信号相同的幅度并与泄漏信号同相。 组合器将取消信号与反相消除信号组合，使其与从正交调制器输出的消除信号相反，以抵消泄漏信号。

    Wireless terminal device
    9.
    发明授权
    Wireless terminal device 失效
    无线终端设备

    公开(公告)号：US07054610B1

    公开(公告)日：2006-05-30

    申请号：US09694675

    申请日：2000-10-24

    申请人： Kenji Itoh ,  Hiroaki Nagano ,  Takatoshi Katsura ,  Shinjirou Fukuyama ,  Mitsuru Mochizuki ,  Yoshinori Matsunami ,  Mitsuhiro Shimozawa ,  Fumio Ishizu ,  Ryoji Hayashi

    发明人： Kenji Itoh ,  Hiroaki Nagano ,  Takatoshi Katsura ,  Shinjirou Fukuyama ,  Mitsuru Mochizuki ,  Yoshinori Matsunami ,  Mitsuhiro Shimozawa ,  Fumio Ishizu ,  Ryoji Hayashi

    IPC分类号： H04B1/30

    CPC分类号： H03D7/1408 ,  H04B1/30

    摘要： In a cellular telephone provided with a receiving circuit of a direct conversion type, a passive low-pass filter is arranged between a mixer for an I-channel and a base band circuit for removing interference waves of or above a channel next to a channel neighboring to the I-channel, and another passive low-pass filter is arranged between a mixer for a Q-channel and the base band circuit for removing interference waves of or above a channel next to a channel neighboring to the Q-channel. Since the low-pass filters for removing the interference waves of or above the channel next to the neighboring channel are of a differential type, the circuit scale can be small, and the power consumption is small. Since the interference waves are removed by the passive low-pass filters and the active low-pass filters, only the desired channel can be reliably received.

    摘要翻译： 在设置有直接转换型接收电路的蜂窝电话中，无源低通滤波器被布置在用于I信道的混频器和用于去除邻近信道旁边的信道上的干扰波的基带电路之间 并且另一个无源低通滤波器被布置在用于Q信道的混频器和用于去除邻近于Q信道的信道旁边的信道上的干扰波的基带电路之间。 由于用于除去邻近通道旁边的通道或其上方的干扰波的低通滤波器是差分型，所以电路规模可以小，功耗小。 由于无源低通滤波器和有源低通滤波器去除了干扰波，所以只能可靠地接收期望的信道。

    LEAKAGE SIGNAL CANCELLATION APPARATUS
    10.
    发明申请
    LEAKAGE SIGNAL CANCELLATION APPARATUS 有权
    泄漏信号取消装置

    公开(公告)号：US20090232260A1

    公开(公告)日：2009-09-17

    申请号：US12065808

    申请日：2006-07-28

    申请人： Ryoji Hayashi ,  Naohisa Takayama ,  Mitsuhiro Shimozawa

    发明人： Ryoji Hayashi ,  Naohisa Takayama ,  Mitsuhiro Shimozawa

    IPC分类号： H03D1/04

    CPC分类号： H04B1/525 ,  G01S7/038

    摘要： A quadrature modulator divides a part of a transmitted signal to generate a cancel signal. A signal comparator compares the amplitude and phase of the cancel signal which is generated by the quadrature modulator with those of a received signal, and outputs signals corresponding to the comparison results to the quadrature modulator. The quadrature modulator generates the cancel signal on the basis of the output signals of the signal comparator, and these components perform feedback control such that the cancel signal has the same amplitude as the leakage signal and is in phase with the leakage signal. A combiner combines the cancel signal with an antiphase cancel signal, which is made to be in opposite phase with the cancel signal outputted from the quadrature modulator, to cancel out the leakage signal.

    摘要翻译： 正交调制器分割发送信号的一部分以产生消除信号。 信号比较器将由正交调制器产生的取消信号的幅度和相位与接收信号的幅度和相位进行比较，并将与比较结果相对应的信号输出到正交调制器。 正交调制器基于信号比较器的输出信号产生消除信号，并且这些分量执行反馈控制，使得消除信号具有与泄漏信号相同的幅度并与泄漏信号同相。 组合器将取消信号与反相消除信号组合，使其与从正交调制器输出的消除信号相反，以抵消泄漏信号。