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    Radio communication system
    51.
    发明授权
    Radio communication system 失效
    无线通信系统

    公开(公告)号：US07496384B2

    公开(公告)日：2009-02-24

    申请号：US11288171

    申请日：2005-11-29

    申请人： Ichiro Seto ,  Yasushi Murakami ,  Osamu Shibata ,  Hidehiro Matsuoka

    发明人： Ichiro Seto ,  Yasushi Murakami ,  Osamu Shibata ,  Hidehiro Matsuoka

    IPC分类号： H04M1/00

    CPC分类号： H04W88/08 ,  H01Q3/2605 ,  H01Q3/2676 ,  H04B7/0617 ,  H04B7/086 ,  H04B10/25753 ,  H04B17/10 ,  H04B17/20 ,  H04J14/02 ,  H04J14/0298

    摘要： There is disclosed a radio communication system in which a constitution of a base station and further a control station can be simplified. A radio communication system according to the present invention converts a received signal received by a plurality of antenna elements in a base station to a signal of different frequency band, and then conflates the converted signal in order to generate sub-carrier wave multiplex signal. The signal is converted to an optical signal, and then the optical signal is transmitted to a control station via an optical fiber. Or the control station performs weighting to phase of the transmitted signal transmitted from a plurality of antennas of a base station, and then performs frequency conversion to different frequency band, and then conflates the converted signal in order to generate the sub-carrier wave multiplex signal. The signal is converted to an optical signal, and then an optical signal is transmitted to the base station side via the optical fiber. The control station and the base station divides the received sub-carrier wave multiplex signal by each frequency band, and then the frequency of the divided signals are converted to the same frequency band in order to generate the transmitted/received signal of each antenna element. By such a constitution, it is possible to reduce constituent of the optical transmission components to the minimum and to simplify the constitution of the base station. Furthermore, it is possible to maintain the relative phase difference and the relative intensity of the transmitted/received signal of each antenna element. Because of this, it is possible to estimate an arrival direction of the received signal and to control radiation beam pattern of the transmitted signal.

    摘要翻译： 公开了一种无线电通信系统，其中可以简化基站的结构和控制站的结构。 根据本发明的无线电通信系统将由基站中的多个天线元件接收的接收信号转换为不同频带的信号，然后混合转换的信号以产生副载波复用信号。 信号被转换为光信号，然后光信号通过光纤传输到控制站。 或者控制站对从基站的多个天线发送的发送信号的相位进行加权，然后对不同的频带进行频率转换，然后混合转换的信号，以产生副载波复用信号 。 信号被转换为光信号，然后经由光纤将光信号发送到基站侧。 控制站和基站将接收到的副载波复用信号除以每个频带，然后将分频信号的频率转换为相同的频带，以便产生每个天线单元的发送/接收信号。 通过这样的结构，能够将光传输部件的成分最小化，并且简化基站的结构。 此外，可以保持每个天线元件的发送/接收信号的相对相位差和相对强度。 因此，可以估计接收信号的到达方向并控制发送信号的辐射束图案。

    Method of starting spark ignition engine without using starter motor
    52.
    发明授权
    Method of starting spark ignition engine without using starter motor 有权
    不使用起动马达启动火花点火发动机的方法

    公开(公告)号：US07461621B2

    公开(公告)日：2008-12-09

    申请号：US11533040

    申请日：2006-09-19

    申请人： Noriyuki Ota ,  Masahiko Fujimoto ,  Yasushi Murakami ,  Keiji Araki ,  Kazuya Yokota

    发明人： Noriyuki Ota ,  Masahiko Fujimoto ,  Yasushi Murakami ,  Keiji Araki ,  Kazuya Yokota

    IPC分类号： F02N17/00 ,  F02N17/08

    CPC分类号： F02B23/104 ,  F02B2023/085 ,  F02B2075/125 ,  F02D13/0207 ,  F02D13/0234 ,  F02D41/062 ,  F02M26/13 ,  F02N19/005 ,  F02N99/006 ,  F02N2019/007 ,  F02P5/1506 ,  F02P15/08 ,  Y02T10/123 ,  Y02T10/125 ,  Y02T10/18

    摘要： There is provided a method of starting a spark ignition engine having multiple cylinders. The method comprises supplying air and fuel for restart into a first cylinder before the engine completely stops, and igniting the mixture of the air and the fuel in the first cylinder in response to an engine start request. In accordance with the method, by supplying air and fuel into the first cylinder before the engine completely stops, the mixture of air and fuel in the first cylinder may be homogeneous at the time of the engine start request. Also, there may be less mixture turbulence and combustion may propagate better within the cylinder. These conditions may reduce the rate of combustion in the first cylinder after a start request is initiated. The slower combustion rate may decrease temperature of the combusted gas while the cylinder wall temperature is relatively low because the engine has stopped. As a result, the slower combustion may reduce heat loss in the first cylinder because of the smaller difference between the temperatures of the combusted gas and the cylinder wall. Consequently, more energy may be directed from the first cylinder to the crankshaft, so that the engine restart becomes more reliable.

    摘要翻译： 提供了一种起动具有多个气缸的火花点火发动机的方法。 该方法包括在发动机完全停止之前将空气和燃料重新启动进入第一气缸，并响应于发动机起动请求点燃第一气缸中的空气和燃料的混合物。 根据该方法，通过在发动机完全停止之前将空气和燃料供应到第一气缸中，在发动机起动请求时，第一气缸中的空气和燃料的混合物可以是均匀的。 此外，可能会有较少的混合物紊流，并且燃烧可能在气缸内更好地传播。 这些条件可以在开始启动请求之后降低第一气缸中的燃烧速率。 由于发动机停止，较慢的燃烧速率可能降低燃烧气体的温度，同时气缸壁温度相对较低。 结果，较慢的燃烧可以减少第一气缸中的热损失，因为燃烧气体和气缸壁的温度之间的差别较小。 因此，更多的能量可以从第一气缸引导到曲轴，使得发动机重起变得更可靠。

    Active array antenna system
    55.
    发明授权
    Active array antenna system 失效
    有源阵列天线系统

    公开(公告)号：US06249249B1

    公开(公告)日：2001-06-19

    申请号：US09310198

    申请日：1999-05-12

    申请人： Shuichi Obayashi ,  Takafumi Yamaji ,  Shoji Otaka ,  Hiroki Shoki ,  Yasushi Murakami

    发明人： Shuichi Obayashi ,  Takafumi Yamaji ,  Shoji Otaka ,  Hiroki Shoki ,  Yasushi Murakami

    IPC分类号： H01Q322

    CPC分类号： H01Q3/34 ,  H01Q3/36 ,  H01Q3/42

    摘要： An active array antenna system comprises a plurality of element antennas and radio frequency circuits connected to the element antennas. The radio frequency circuits comprises first frequency converters provided to correspond to the element antenna and converts the frequency between a carrier-wave frequency and a first intermediate-frequency by using a carrier-wave frequency band local signal, second frequency converters provided to correspond to the element antenna and converts the frequency between the first intermediate-frequency signal and a second intermediate-frequency which is lower than the first intermediate frequency by using an intermediate-frequency band local signal, and a variable phase shifter circuit for individually controlling the phases of the intermediate-frequency local signals which are supplied to the second frequency converters. A variable phase shifter circuit for beam scan can be constituted at a low cost so that an active array antenna system which can be realized at a low cost is provided.

    摘要翻译： 有源阵列天线系统包括连接到元件天线的多个元件天线和射频电路。 射频电路包括：第一频率转换器，其被提供用于对应于元件天线，并通过使用载波频带本地信号在载波频率和第一中频之间转换频率，第二频率转换器被提供以对应于 并且通过使用中频带本地信号来转换第一中频信号和低于第一中频的第二中频之间的频率，以及可变移相器电路，用于单独控制 提供给第二变频器的中频局部信号。 可以以低成本构成用于光束扫描的可变移相器电路，从而提供可以以低成本实现的有源阵列天线系统。