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    • 3. 发明授权
    • Low noise converting apparatus
    • 低噪音转换装置
    • US06763223B1
    • 2004-07-13
    • US09517793
    • 2000-03-02
    • Katsuki HirabayashiMasayuki Tanaka
    • Katsuki HirabayashiMasayuki Tanaka
    • H04B714
    • H01Q1/247H01Q5/45
    • A reception signal of a horizontally polarized wave and a reception signal of a vertically polarized wave from one satellite are amplified by a first pair of low noise amplifiers, and a reception signal of a horizontally polarized wave and a reception signal of a vertically polarized wave from another satellite are amplified by a second pair of low noise amplifiers. One of the low noise amplifiers is selected in accordance with the polarized wave and the satellite, and the signal from the selected low noise amplifier is supplied to a further low noise amplifier through a coupling circuit. The coupling circuit includes extending portions extended in strip conductor shapes from the first pair of low noise amplifiers and an extending element extended in a strip conductor shape from an input of the next stage low noise amplifier. The extending portions and the extended element are arranged so as to closely face each other.
    • 来自一个卫星的水平极化波的接收信号和垂直极化波的接收信号被第一对低噪声放大器放大,水平极化波的接收信号和垂直极化波的接收信号从 另一颗卫星由第二对低噪声放大器放大。 根据偏振波和卫星选择其中一个低噪声放大器,并且来自所选低噪声放大器的信号通过耦合电路提供给另一低噪声放大器。 耦合电路包括从第一对低噪声放大器的带状导体形状延伸的延伸部分和从下一级低噪声放大器的输入端延伸成带状导体形状的延伸元件。 延伸部分和延伸元件布置成彼此紧密相对。
    • 4. 发明授权
    • Radio communication system, radio communication method, and recording medium for storing a program for selection of a repeater in radio communication system
    • 无线电通信系统,无线电通信方法和用于存储用于在无线电通信系统中选择中继器的程序的记录介质
    • US06714762B2
    • 2004-03-30
    • US09780496
    • 2001-02-12
    • Yoshinori Nakatsugawa
    • Yoshinori Nakatsugawa
    • H04B714
    • H04W48/20H04B7/155H04W40/00H04W84/18H04W88/04
    • A radio communication system of this invention includes: terminals for sending a connection request through broadcast, detecting a reception condition when a connection request echo sent back is received as a terminal reception condition and sending it through broadcast; plural repeaters for detecting a reception condition when the connection request is received as a repeater reception condition, sending a connection request echo including this repeater reception condition and sending back a terminal reception condition echo to a master repeater when it receives a terminal reception condition; and a master repeater for when receiving the connection request echo and terminal reception condition, selecting a repeater securing an optimum communication state based on the repeater reception condition and terminal reception condition.
    • 本发明的无线通信系统包括:通过广播发送连接请求的终端,当接收到发送的连接请求回波时检测接收条件作为终端接收条件,并通过广播发送; 当接收到连接请求作为中继器接收条件时,用于检测接收条件的多个中继器,发送包括该中继器接收条件的连接请求回叫,并且当终端接收条件回波接收到终端接收条件时将终端接收条件回波发送给主中继器; 以及主中继器,当接收到连接请求回显和终端接收条件时,基于中继器接收条件和终端接收条件选择确保最佳通信状态的中继器。
    • 5. 发明授权
    • Digital sonar transducer
    • 数字声纳传感器
    • US06667934B1
    • 2003-12-23
    • US10224813
    • 2002-08-21
    • Robert W. Healey
    • Robert W. Healey
    • H04B714
    • G01S7/003G01S15/87G01S15/96
    • A sonar system, and a digital sonar transducer for use with the inventive system, in which transmitter and receiver circuitry are remote to the sonar display unit. In a preferred embodiment the digital sonar transducer includes: a housing; an acoustic transducer housed within the housing; transmitter circuitry for driving the acoustic transducer; receiver circuitry for conditioning received echos; and a computing device for receiving commands from a display unit, processing received echos, and sending echo information to the display unit. The display unit of the inventive system is configured to receive echo information from the digital sonar transducer and display sonar information to an operator.
    • 声纳系统和用于本发明系统的数字声纳传感器,其中发射器和接收器电路远离声纳显示单元。 在优选实施例中,数字声纳换能器包括:壳体; 容纳在壳体内的声学换能器; 用于驱动声换能器的发射器电路; 用于调节接收回波的接收器电路; 以及用于从显示单元接收命令,处理接收到的回波并向显示单元发送回波信息的计算设备。 本发明系统的显示单元被配置为从数字声纳传感器接收回波信息并向操作者显示声纳信息。
    • 7. 发明授权
    • System and method for relaying signals to base stations in a wireless communications system
    • 用于在无线通信系统中将信号中继到基站的系统和方法
    • US06272351B1
    • 2001-08-07
    • US08993182
    • 1997-12-18
    • J. Leland LangstonDouglas B. WeinerWilliam K. MyersJames S. Marin
    • J. Leland LangstonDouglas B. WeinerWilliam K. MyersJames S. Marin
    • H04B714
    • H04B7/2606H04W88/085
    • A wireless communication system (100) is disclosed in which a central office (102) generates a signal. A first base station (104) receives the central office signal and transmits a first broadcast signal in a first frequency range in response to the central office signal. A second base station (124) receives the first broadcast signal and transmits a second broadcast signal in a second frequency range in response to the first broadcast signal. A third base station (134) receives the second broadcast signal and transmits a third broadcast signal in the first frequency range in response to the second broadcast signal. In accordance with the present invention, a plurality of base stations are each able to provide one-way or two-way communication to a plurality of customers (110, 130, 140), with only one base station (104) receiving signals directly from the central office (102).
    • 公开了一种无线通信系统(100),其中中心局(102)产生信号。 第一基站(104)响应于中心局信号,接收中心局信号并发送第一频率范围内的第一广播信号。 第二基站(124)响应于第一广播信号接收第一广播信号并在第二频率范围内发送第二广播信号。 第三基站(134)响应于第二广播信号接收第二广播信号并且在第一频率范围内发送第三广播信号。 根据本发明,多个基站各自能够向多个客户(110,130,140)提供单向或双向通信,只有一个基站(104)直接从 中央办公室(102)。
    • 9. 发明授权
    • Radio transmission control method and radio transmission device
    • 无线传输控制方法和无线传输装置
    • US06714801B1
    • 2004-03-30
    • US09650714
    • 2000-08-30
    • Shigeru Sugaya
    • Shigeru Sugaya
    • H04B714
    • H04W74/06H04W52/0232Y02D70/10
    • A method and device whereby it is possible to transmit necessary information by using a minimum of radio transmission channels in a radio transmission network. In order that a network system using radio waves can coexist with other communication systems, the network system usually operates in a dormant state. If the network system has detected a possibility of information transmission on a radio transmission channel based on behavior of a connected device or on a transmission channel for the device, then the network system constructs a radio network in advance prior to radio transmission and comes in an operational state. In asynchronous radio transmission channels, a polling operation from a control station to each of peripheral terminal stations on a network is not executed and information transmission is not conducted, in a steady state. If a transmission demand has occurred in any peripheral terminal station, then the peripheral terminal station transmits a polling request signal to a control station and causes a polling operation from the central control station to be started.
    • 一种可以通过使用无线电传输网络中的最小无线电传输信道来发送必要信息的方法和装置。 为了使用无线电波的网络系统可以与其他通信系统共存,网络系统通常处于休眠状态。 如果网络系统基于连接的设备的行为或设备的传输信道检测到在无线传输信道上的信息传输的可能性,则网络系统在无线电传输之前预先构建无线电网络,并且进入 运行状态 在异步无线传输信道中,不执行从控制站到网络上的每个外围终端站的轮询操作,并且在稳定状态下不进行信息传输。 如果在任何外围终端站发生了传输需求,则外围终端站向控制站发送轮询请求信号,并且启动来自中央控制站的轮询操作。