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129 条记录 (耗时 0.036 秒)

    Transmission apparatus
    3.
    发明授权
    Transmission apparatus 失效
    传输装置

    公开(公告)号：US06522869B1

    公开(公告)日：2003-02-18

    申请号：US09446082

    申请日：1999-12-17

    申请人： Katsuhiko Hiramatsu ,  Mitsuru Uesugi ,  Masatoshi Watanabe ,  Toyoki Ue

    发明人： Katsuhiko Hiramatsu ,  Mitsuru Uesugi ,  Masatoshi Watanabe ,  Toyoki Ue

    IPC分类号： H04B104

    CPC分类号： H04L27/2623 ,  H04L5/0016 ,  H04L5/06 ,  H04L27/2602

    摘要： Signals subjected to orthogonal modulation with a plurality of carrier frequencies are added to detect peak power. Based on the peak power, a coefficient for suppressing an amplitude of a transmission baseband signal is calculated. Using the coefficient, the amplitude of a baseband signal to be inputted to a filter is suppressed. It is thereby possible to suppress the peak power assuredly, and by the effects of the filter, unnecessary frequencies are not generated.

    摘要翻译： 加入经受多个载频的正交调制的信号，以检测峰值功率。 基于峰值功率，计算用于抑制发送基带信号的振幅的系数。 使用该系数，抑制要输入到滤波器的基带信号的幅度。 从而可以可靠地抑制峰值功率，并且通过滤波器的效果，不产生不必要的频率。

    Mobile radio apparatus
    4.
    发明授权
    Mobile radio apparatus 失效
    移动无线电设备

    公开(公告)号：US6047015A

    公开(公告)日：2000-04-04

    申请号：US546554

    申请日：1995-10-20

    申请人： Masatoshi Watanabe ,  Kazuyuki Miya ,  Osamu Kato

    发明人： Masatoshi Watanabe ,  Kazuyuki Miya ,  Osamu Kato

    IPC分类号： H04B1/692 ,  H04B1/709 ,  H04B7/26 ,  A61F2/06 ,  H04L27/30

    CPC分类号： H04B1/709 ,  H04B1/692 ,  H04B7/2628

    摘要： A mobile radio apparatus includes a base station and a mobile station which communicate with each other by a hybrid code division multiple access scheme. The base station selects a hopping pattern in a frequency hopping method so as to completely avoid overlapping of a carrier for a forward link signal with a carrier for a reverse link signal at the same time, and transmits the forward link signal in a predetermined frequency band. The mobile station similarly transmits the reverse link signal. The mobile station has a multiplier for multiplying the forward link signal by a carrier at the same frequency as the carrier for the forward link signal to derive a received signal, a communication channel correlator for detecting a correlation of the received signal to separate a communication channel signal, a received power level detector circuit for detecting a received power level of the communication channel signal, and a transmission power level control signal for controlling a transmission power level of the reverse link signal, when transmitted to the base station, based on the received power level of the communication channel signal, using a carrier at the same frequency as the carrier for the forward link signal when the received power level of the communication channel signal is detected.

    摘要翻译： 移动无线电设备包括通过混合码分多址方案相互通信的基站和移动台。 基站以跳频方式选择跳频图案，以便完全避免前向链路信号的载波与用于反向链路信号的载波同时重叠，并且将预定频带中的前向链路信号 。 移动站类似地发送反向链路信号。 移动站具有乘法器，用于将前向链路信号乘以与用于前向链路信号的载波相同频率的载波以导出接收信号;通信信道相关器，用于检测接收信号的相关性以分离通信信道 信号，用于检测通信信道信号的接收功率电平的接收功率电平检测器电路，以及发送功率电平控制信号，用于当基于接收到的信号发送到基站时控制反向链路信号的发送功率电平 当检测到通信信道信号的接收功率电平时，使用与前向链路信号的载波相同频率的载波的通信信道信号的功率电平。

    Wireless mobile system
    5.
    发明授权
    Wireless mobile system 失效
    无线移动系统

    公开(公告)号：US5802110A

    公开(公告)日：1998-09-01

    申请号：US385961

    申请日：1995-02-09

    申请人： Masatoshi Watanabe ,  Kazuyuki Miya ,  Osamu Kato

    发明人： Masatoshi Watanabe ,  Kazuyuki Miya ,  Osamu Kato

    IPC分类号： H04B7/005 ,  H04L5/14 ,  H04L27/00 ,  H04K1/00

    CPC分类号： H04L5/1492 ,  H04W52/04

    摘要： A base station transmits a first signal spread according to a direct spread scheme and having carrier frequencies hopped between two frequencies f1 and f2. In a mobile station, output signals of two carrier generators are changed over by a change-over switch. When the signal transmission frequency in the base station is f1, the mobile station receives the first signal having the frequency f1 and transmits a second signal having the frequency f2. When the signal transmission frequency in the base station is f2, the mobile station receives the first signal having the frequency f2 and transmits the second signal having the frequency f1. A received power level detector in the mobile station detects a power level of the first signal received during each hop (the duration of the same frequency), and, on the basis of the detected power level, a transmission power level control circuit controls the power level of the second signal to be transmitted during the next hop, that is, at the time of transmission of the second signal having the same carrier frequency as that of the first signal whose power level has been detected.

    摘要翻译： 基站发送根据直接扩展方案扩展的第一信号，并且具有在两个频率f1和f2之间跳过的载波频率。 在移动站中，两个载波发生器的输出信号由切换开关切换。 当基站中的信号发送频率为f1时，移动站接收具有频率f1的第一信号，并发送具有频率f2的第二信号。 当基站的信号发送频率为f2时，移动站接收具有频率f2的第一信号，并发送具有频率f1的第二信号。 移动站中的接收功率电平检测器检测在每一跳期间接收到的第一信号（相同频率的持续时间）的功率电平，并且基于检测到的功率电平，发送功率电平控制电路控制功率 在下一跳期间要发送的第二信号的电平，即在与检测到功率电平的第一信号具有相同载波频率的第二信号的发送时。

    CDMA cellular radio transmission system
    7.
    发明授权
    CDMA cellular radio transmission system 有权
    CDMA蜂窝无线电传输系统

    公开(公告)号：US06480479B1

    公开(公告)日：2002-11-12

    申请号：US09676507

    申请日：2000-10-02

    申请人： Kazuyuki Miya ,  Masatoshi Watanabe ,  Osamu Kato

    发明人： Kazuyuki Miya ,  Masatoshi Watanabe ,  Osamu Kato

    IPC分类号： H04B7216

    CPC分类号： H04W52/32 ,  H04B1/707 ,  H04B1/7097 ,  H04B7/2637 ,  H04B2201/70701

    摘要： A base station transmits, in addition to a pilot channel, signals which are multiplexed with pilot symbols inserted in the respective signals in communication channels. As the transmission of the pilot channel as a reference signal for coherent detection is unnecessary with high power so as to attain high reliability, the pilot channel can be transmitted with low power by means of weight in comparison with the communication channel, so that interference with the communication channel of any other station is reduced. Moreover, accurate coherent detection can be made from the pilot symbol inserted in the communication channel on the mobile station side.

    摘要翻译： 除了导频信道之外，基站还发送与在通信信道中的各个信号中插入的导频符号多路复用的信号。 由于作为用于相干检测的参考信号的导频信道的传输不需要高功率以便获得高可靠性，所以与通信信道相比，可以通过权重以低功率​​发送导频信道，从而干扰 任何其他站的通信信道减少。 此外，可以从插入在移动台侧的通信信道中的导频符号进行准确的相干检测。

    CDMA cellular radio transmission system
    8.
    发明授权
    CDMA cellular radio transmission system 有权

    公开(公告)号：US06400700B1

    公开(公告)日：2002-06-04

    申请号：US09457785

    申请日：1999-12-09

    申请人： Kazuyuki Miya ,  Masatoshi Watanabe ,  Osamu Kato

    发明人： Kazuyuki Miya ,  Masatoshi Watanabe ,  Osamu Kato

    IPC分类号： H04B7216

    CPC分类号： H04W52/32 ,  H04B1/707 ,  H04B1/7097 ,  H04B7/2637 ,  H04B2201/70701

    摘要： A base station transmits, in addition to a pilot channel, signals which are multiplexed with pilot symbols inserted in the respective signals in communication channels. As the transmission of the pilot channel as a reference signal for coherent detection is unnecessary with high power so as to attain high reliability, the pilot channel can be transmitted with low power by means of weight in comparison with the communication channel, so that interference with the communication channel of any other station is reduced. Moreover, accurate coherent detection can be made from the pilot symbol inserted in the communication channel on the mobile station side.

    CDMA/TDD Radio Communication System
    9.
    发明授权
    CDMA/TDD Radio Communication System 失效
    CDMA / TDD无线电通信系统

    公开(公告)号：US5559789A

    公开(公告)日：1996-09-24

    申请号：US369485

    申请日：1995-01-06

    申请人： Takayuki Nakano ,  Kazuyuki Miya ,  Osamu Kato ,  Masatoshi Watanabe

    发明人： Takayuki Nakano ,  Kazuyuki Miya ,  Osamu Kato ,  Masatoshi Watanabe

    IPC分类号： H04B7/005 ,  H04B7/26 ,  H04J13/04

    CPC分类号： H04W52/325 ,  H04B7/2618 ,  H04B7/2637 ,  H04W52/10 ,  H04W52/16

    摘要： In addition to a structure of a conventional CDMA/TDD radio communication system, a base station includes a pilot signal generating circuit for generating a pilot signal that has a constant transmission power level and is known in mobile units and a pilot channel spreading circuit for transmitting the pilot signal to the mobile units through a transmission line. Each of the mobile units includes a pilot signal reception level measuring circuit for measuring reception power of the received pilot signal and a transmission power control circuit for controlling transmission power of a power amplification circuit based on the measured reception power of the received pilot signal.

    摘要翻译： 除了常规的CDMA / TDD无线电通信系统的结构之外，基站还包括一个导频信号产生电路，用于产生具有恒定的发射功率电平且以移动单元已知的导频信号，以及用于传输的导频信道扩展电路 该导频通过传输线向移动单元发送信号。 每个移动单元包括用于测量接收到的导频信号的接收功率的导频信号接收电平测量电路和用于基于所测量的接收到的导频信号的接收功率来控制功率放大电路的发射功率的发射功率控制电路。

    CDMA cellular radio transmission system
    10.
    发明授权
    CDMA cellular radio transmission system 有权

    公开(公告)号：US06493330B1

    公开(公告)日：2002-12-10

    申请号：US09615325

    申请日：2000-07-12

    申请人： Kazuyuki Miya ,  Masatoshi Watanabe ,  Osamu Kato

    发明人： Kazuyuki Miya ,  Masatoshi Watanabe ,  Osamu Kato

    IPC分类号： H04B7216

    CPC分类号： H04W52/32 ,  H04B1/707 ,  H04B1/7097 ,  H04B7/2637 ,  H04B2201/70701

    摘要： A base station transmits, in addition to a pilot channel, signals which are multiplexed with pilot symbols inserted in the respective signals in communication channels. As the transmission of the pilot channel as a reference signal for coherent detection is unnecessary with high power so as to attain high reliability, the pilot channel can be transmitted with low power by means of weight in comparison with the communication channel, so that interference with the communication channel of any other station is reduced. Moreover, accurate coherent detection can be made from the pilot symbol inserted in the communication channel on the mobile station side.