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    • 61. 发明授权
    • MIMO wireless communication system and wireless communication apparatuses
    • MIMO无线通信系统和无线通信装置
    • US07379759B2
    • 2008-05-27
    • US11354792
    • 2006-02-15
    • Yuuta NakayaTakeshi TodaYasuyuki OishiKaoru Yokoo
    • Yuuta NakayaTakeshi TodaYasuyuki OishiKaoru Yokoo
    • H04M1/00
    • H01Q3/26H01Q3/44H01Q21/245H04B7/043H04B7/0615H04B7/0617H04B7/0848H04B7/0854
    • A MIMO wireless communication system and wireless communication apparatuses are disclosed that increase the practically usable communication channel capacity in the Shannon channel capacity that determines the ratio of maximum signal transmission speed to frequency. Each wireless communication apparatus includes antenna units that transmit and receive radio frequency signals, and a weight controlling unit that provides weights with respect to the antenna units. The antenna units are formed by adaptive array antenna units that can change the directivity by varying weights with respect to antenna elements. The weight controlling unit includes an eigenvalue calculating unit that calculates the eigenvalues of a matrix HH* (H being a channel matrix), an inverse calculation unit that calculates such a channel matrix H′ as to have all eigenvalues within a predetermined range that includes the average value of the calculated eigenvalues, and a directivity adjusting unit that adjusts the adaptive array antenna directivity so that the current channel matrix H approaches the calculated channel matrix H′.
    • 公开了一种MIMO无线通信系统和无线通信装置,其增加了确定最大信号传输速度与频率的比率的香农信道容量中实际可用的通信信道容量。 每个无线通信装置包括发送和接收射频信号的天线单元,以及提供关于天线单元的权重的权重控制单元。 天线单元由自适应阵列天线单元形成,其可以通过相对于天线元件改变权重来改变方向性。 权重控制单元包括计算矩阵HH *(H为信道矩阵)的特征值的特征值计算单元,计算这样的信道矩阵H'以使所有特征值在包括 计算的特征值的平均值,以及调整自适应阵列天线方向性使得当前信道矩阵H接近计算的信道矩阵H'的方向性调整单元。
    • 63. 发明授权
    • Radar device
    • 雷达设备
    • US07030807B2
    • 2006-04-18
    • US11077065
    • 2005-03-10
    • Kaoru YokooYasuyuki Oishi
    • Kaoru YokooYasuyuki Oishi
    • G01S13/10G01S13/93
    • G01S13/103
    • The invention relates to a radar device for measuring a relative distance to a target. It is an object of the invention to precisely determine the relative distance to the target in a wide range. The radar device according to the invention generates a second pulse by demodulating a signal arriving from a target as a response to a wave signal modulated with a first pulse. The radar device evaluates, as the relative distance to the target, such two different instances that an absolute value of a deviation of a ratio of two instantaneous values of the second pulse from a reference value as a ratio of two instantaneous values of the first pulse is to be minimum. The respective two instantaneous values are with a predetermined interval therebetween on a time axis.
    • 本发明涉及一种用于测量与目标的相对距离的雷达装置。 本发明的一个目的是在宽范围内精确地确定与目标的相对距离。 根据本发明的雷达装置通过解调从目标到达的信号作为对用第一脉冲调制的波信号的响应来产生第二脉冲。 雷达装置评估作为到目标的相对距离的两个不同情况,即将第二脉冲的两个瞬时值与参考值的比值的偏差的绝对值作为第一脉冲的两个瞬时值的比率 是最小的。 相应的两个瞬时值在时间轴上具有预定间隔。
    • 66. 发明申请
    • Mimo wireless communication system and wireless communication apparatuses
    • Mimo无线通信系统和无线通信设备
    • US20050020310A1
    • 2005-01-27
    • US10801426
    • 2004-03-16
    • Yuuta NakayaTakeshi TodaYasuyuki OishiKaoru Yokoo
    • Yuuta NakayaTakeshi TodaYasuyuki OishiKaoru Yokoo
    • H04J99/00H04B7/04H04B7/06H04B7/08H04B7/10H04B7/26H04Q7/20
    • H01Q3/26H01Q3/44H01Q21/245H04B7/043H04B7/0615H04B7/0617H04B7/0848H04B7/0854
    • A MIMO wireless communication system and wireless communication apparatuses are disclosed that increase the practically usable communication channel capacity in the Shannon channel capacity that determines the ratio of maximum signal transmission speed to frequency. Each wireless communication apparatus includes antenna units that transmit and receive radio frequency signals, and a weight controlling unit that provides weights with respect to the antenna units. The antenna units are formed by adaptive array antenna units that can change the directivity by varying weights with respect to antenna elements. The weight controlling unit includes an eigenvalue calculating unit that calculates the eigenvalues of a matrix HH* (H being a channel matrix), an inverse calculation unit that calculates such a channel matrix H′ as to have all eigenvalues within a predetermined range that includes the average value-of the calculated eigenvalues, and a directivity adjusting unit that adjusts the adaptive array antenna directivity so that the current channel matrix H approaches the calculated channel matrix H′.
    • 公开了一种MIMO无线通信系统和无线通信装置,其增加了确定最大信号传输速度与频率的比率的香农信道容量中实际可用的通信信道容量。 每个无线通信装置包括发送和接收射频信号的天线单元,以及提供关于天线单元的权重的权重控制单元。 天线单元由自适应阵列天线单元形成,其可以通过相对于天线元件改变权重来改变方向性。 权重控制单元包括计算矩阵HH *(H为信道矩阵)的特征值的特征值计算单元,计算这样的信道矩阵H'以使所有特征值在包括 计算的特征值的平均值,以及调整自适应阵列天线方向性使得当前信道矩阵H接近计算的信道矩阵H'的方向性调整单元。
    • 70. 发明授权
    • Adaptive controller and adaptive control method that can adaptively control a plurality of variable high frequency devices at high speed
    • 自适应控制器和可以高速自适应地控制多个可变高频装置的自适应控制方法
    • US06989721B2
    • 2006-01-24
    • US10803699
    • 2004-03-18
    • Takeshi TodaYuuta NakayaYasuyuki OishiKaoru YokooShinsuke HaraYuji Irie
    • Takeshi TodaYuuta NakayaYasuyuki OishiKaoru YokooShinsuke HaraYuji Irie
    • H03H21/00H03H7/40
    • G05B13/024
    • An adaptive controller adaptively controls a plurality of variable high frequency devices. A calculation part calculates a scalar function value by using a signal varied in accordance with impedances of the variable high frequency devices, a reference signal, and a predetermined scalar function. An impedance variation part creates a signal that sequentially varies the impedances of the variable high frequency devices. A determination part determines, when the impedance of one of the variable high frequency devices is varied, whether a direction in which the scalar function value is varied is in a predetermined sloped direction. The impedance variation part includes a first variation part that, when a decision result in the determination part is in the predetermined direction, creates a signal that further varies the impedance of the one of the variable high frequency devices in the predetermined sloped direction. The impedance variation part also includes a second variation part that, when the decision result in the determination part is not in the predetermined sloped direction, creates one of a signal that varies the impedance of the one of the variable high frequency devices in an oppositely sloped direction and a signal that varies the impedance of another one of the variable high frequency devices.
    • 自适应控制器自适应地控制多个可变高频装置。 计算部分通过使用根据可变高频装置的阻抗变化的信号,参考信号和预定标量函数来计算标量函数值。 阻抗变化部分产生顺序改变可变高频装置的阻抗的信号。 确定部件当改变可变高频装置之一的阻抗时,确定标量函数值的变化方向是否处于预定的倾斜方向。 阻抗变化部包括第一变化部,当判定部的判定结果为预定方向时,产生进一步改变预定倾斜方向上的一个可变高频部的阻抗的信号。 阻抗变化部还包括第二变化部,当判定部不是预定倾斜方向的判定结果时,产生使相对倾斜的变高频装置的阻抗变化的信号 方向和改变另一个可变高频装置的阻抗的信号。