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    Spread spectrum communication apparatus and synchronization acquisition method therein
    1.
    发明授权
    Spread spectrum communication apparatus and synchronization acquisition method therein 失效
    扩频通信装置及其同步采集方法

    公开(公告)号：US06816543B1

    公开(公告)日：2004-11-09

    申请号：US09654730

    申请日：2000-09-05

    申请人： Akira Shibuta

    发明人： Akira Shibuta

    IPC分类号： H04J1304

    CPC分类号： H04B1/7077

    摘要： A spread spectrum communications apparatus for synchronizing a received spread spectrum modulated signal and a de-spreading code, and its synchronization acquisition method are disclosed. In the first synchronization acquisition operation, the phase of the de-spreading code is sequentially changed finely depending on the number of chips, and the correlation value of the spread spectrum modulated signal and de-spreading code is detected. Further, the maximum value and average of the correlation value for the number of times of detection are determined. When the maximum value is judged to be larger than the sum of the average and a specified threshold level, the first acquisition operation is completed. Consequently, the process is advanced to a second synchronization acquisition operation for determining the phase for establishing the synchronization by changing finely the phase of the de-spreading code before and after the phase corresponding to the maximum value.

    Wireless communication system and wireless communication device
    2.
    发明授权
    Wireless communication system and wireless communication device 有权
    无线通信系统和无线通信设备

    公开(公告)号：US09204465B2

    公开(公告)日：2015-12-01

    申请号：US13884361

    申请日：2011-11-10

    申请人： Yutaka Suwa ,  Hiroyuki Ishihara ,  Akira Shibuta ,  Konomi Suwa

    发明人： Yutaka Suwa ,  Hiroyuki Ishihara ,  Akira Shibuta ,  Konomi Suwa

    IPC分类号： H04W88/06 ,  H04W88/10 ,  H04W52/02 ,  H04W74/08 ,  H04W56/00 ,  H04W16/14 ,  H04B7/26

    CPC分类号： H04W74/0816 ,  H04B7/2643 ,  H04W16/14 ,  H04W52/0216 ,  H04W56/0015 ,  H04W88/06 ,  H04W88/10 ,  Y02D70/1222 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/449

    摘要： In a wireless communication system that conducts a communication between a base station and a terminal the base station includes a first communication unit using a first communication system of a TDMA system, and a second communication unit using a second communication system, and the terminal includes a third communication unit using the first communication system, and a fourth communication unit using the second communication system. The base station transmits a control signal in the first communication system with the use of the first communication unit, and the base station determines timing of transmission for the second communication unit according to timing of TDMA of the first communication unit. The third communication unit receives the control signal transmitted from the base station in the first communication system, and the fourth communication unit controls receiving operation according to information included in the control signal.

    摘要翻译： 在进行基站和终端之间的通信的无线通信系统中，基站包括使用TDMA系统的第一通信系统的第一通信单元和使用第二通信系统的第二通信单元，并且终端包括 使用第一通信系统的第三通信单元，以及使用第二通信系统的第四通信单元。 基站使用第一通信单元在第一通信系统中发送控制信号，并且基站根据第一通信单元的TDMA的定时确定第二通信单元的发送定时。 第三通信单元接收在第一通信系统中从基站发送的控制信号，第四通信单元根据包含在控制信号中的信息控制接收操作。

    WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION DEVICE
    3.
    发明申请
    WIRELESS COMMUNICATION SYSTEM AND WIRELESS COMMUNICATION DEVICE 有权
    无线通信系统和无线通信设备

    公开(公告)号：US20130272277A1

    公开(公告)日：2013-10-17

    申请号：US13884361

    申请日：2011-11-10

    申请人： Yutaka Suwa ,  Hiroyuki Ishihara ,  Akira Shibuta

    发明人： Yutaka Suwa ,  Hiroyuki Ishihara ,  Akira Shibuta

    IPC分类号： H04W74/08

    CPC分类号： H04W74/0816 ,  H04B7/2643 ,  H04W16/14 ,  H04W52/0216 ,  H04W56/0015 ,  H04W88/06 ,  H04W88/10 ,  Y02D70/1222 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/449

    摘要： In a wireless communication system that conducts a communication between a base station and a terminal the base station includes a first communication unit using a first communication system of a TDMA system, and a second communication unit using a second communication system, and the terminal includes a third communication unit using the first communication system, and a fourth communication unit using the second communication system. The base station transmits a control signal in the first communication system with the use of the first communication unit, and the base station determines timing of transmission for the second communication unit according to timing of TDMA of the first communication unit. The third communication unit receives the control signal transmitted from the base station in the first communication system, and the fourth communication unit controls receiving operation according to information included in the control signal.

    摘要翻译： 在进行基站和终端之间的通信的无线通信系统中，基站包括使用TDMA系统的第一通信系统的第一通信单元和使用第二通信系统的第二通信单元，并且终端包括 使用第一通信系统的第三通信单元，以及使用第二通信系统的第四通信单元。 基站使用第一通信单元在第一通信系统中发送控制信号，并且基站根据第一通信单元的TDMA的定时确定第二通信单元的发送定时。 第三通信单元接收在第一通信系统中从基站发送的控制信号，第四通信单元根据包含在控制信号中的信息控制接收操作。

    Spread-spectrum communication apparatus
    6.
    发明授权
    Spread-spectrum communication apparatus 有权
    扩频通信装置

    公开(公告)号：US06700921B1

    公开(公告)日：2004-03-02

    申请号：US09479635

    申请日：2000-01-07

    申请人： Akira Shibuta

    发明人： Akira Shibuta

    IPC分类号： H04B1707

    CPC分类号： H04B1/7085 ,  H04B1/7075

    摘要： A spread-spectrum communication apparatus includes an analog modulator and demodulator for modulating and demodulating information in its transmitter and receiver respectively. The apparatus also includes a spreader and de-spreader for modulating and demodulating a spread-spectrum signal respectively in its transmitter and receiver. This structure widens a dynamic range of the RSSI with an inexpensive and simple circuit. This structure also allows the apparatus to operate in a stable manner against an intense input signal, to detect an “out of sync” in a highly reliable manner and move immediately to a “sync-tracking mode”.

    摘要翻译： 扩频通信装置包括用于分别在其发射机和接收机中调制和解调信息的模拟调制器和解调器。 该装置还包括用于在其发射机和接收机中分别调制和解调扩频信号的扩展器和解扩器。 该结构利用廉价且简单的电路拓宽了RSSI的动态范围。 该结构还允许装置以稳定的方式抵抗强烈的输入信号操作，以高度可靠的方式检测“不同步”，并立即移动到“同步跟踪模式”。