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    • 5. 发明授权
    • Phase detector
    • 相位检测器
    • US5732109A
    • 1998-03-24
    • US549811
    • 1995-12-07
    • Hidehiro Takahashi
    • Hidehiro Takahashi
    • H04L27/00H04L27/233H04L27/14H04L27/16
    • H04L27/2332H04L2027/003H04L2027/0057
    • Disclosed is a phase detection apparatus for accurately calculating the phase of an input digital complex baseband signal point independently of its amplitude value, without requiring any large-capacity arc-tangent table memory and within a practical calculation time. This phase detection apparatus rotates the phase of the input signal point in a clockwise direction and determines whether the rotated signal point agrees with a reference phase point. If the rotated signal point leads the reference phase point, the signal point is further rotated by an angle onehalf of the predetermined angle. If the rotated signal point lags behind the reference phase point, the signal point before the rotation is rotated by a half angle of the predetermined angle. Rotational angles, 180.degree., 90.degree., 45.degree., . . . , for the individual rotations are stored in a table. If the rotated signal point agrees with the reference phase point after the rotation processing is performed several times, or, even if the two points do not agree, if all of the rotational angles stored in the table are used in the rotation processing, the sum of the angles rotated so far is output as the phase of the input signal.
    • PCT No.PCT / JP94 / 00915 Sec。 371 1995年12月7日第 102(e)日期1995年12月7日PCT提交1994年6月7日PCT公布。 WO94 / 29991 PCT出版物 日期1994年12月22日公开是一种相位检测装置,用于与其幅度值无关地准确地计算输入数字复基带信号点的相位,而不需要任何大容量的正切表存储器,并且在实际的计算时间内。 该相位检测装置使输入信号点的相位沿顺时针方向旋转,并且确定旋转的信号点是否与参考相位点一致。 如果旋转的信号点引导参考相位点,则信号点进一步旋转预定角度的一角。 如果旋转的信号点落在参考相位点之后,则旋转之前的信号点旋转预定角度的一半角。 旋转角180°,90°,45°。 。 。 ,对于单个旋转存储在表中。 如果旋转信号点在执行旋转处理几次后与参考相位点一致,或者即使两个点不一致,则如果在旋转处理中使用存储在表中的所有旋转角度,则总和 到目前为止旋转的角度作为输入信号的相位被输出。
    • 8. 发明授权
    • Radio communication apparatus of diversity transmission system
    • 分集传输系统的无线电通信装置
    • US06396821B1
    • 2002-05-28
    • US09101974
    • 1998-07-30
    • Hidehiro Takahashi
    • Hidehiro Takahashi
    • H04B7216
    • H04B7/0608H04B7/082H04L1/06Y02D70/444
    • A radio communication apparatus with a diversity transmission function is provided with an auxiliary transmitter Further to transmitters peculiar to channels. CDMA system signals received by antennas are modulated for respective channels, a maximum reception power level of each channel is detected, and an antenna with a maximum level is found. In a diversity transmission control, it is determined whether or not maximum reception levels of all channels are equal to or higher than a predetermined level. If the maximum reception levels of all channels are equal to or higher than the predetermined level, an ordinary diversity control is performed. Specifically, transmission signals of respective channels are transmitted from antennas with maximum reception power levels via the transmitters peculiar to the channels. If the maximum reception level of any one of the channels is the predetermined level or less, the transmission signal of the associated channel is transmitted from the antenna with a second highest reception power level of the channel via the auxiliary transmitter, Further to the ordinary diversity control.
    • 具有分集传输功能的无线电通信装置还具有辅助发射机,还包括通道特有的发射机。 天线接收到的CDMA系统信号被调制用于各个信道,检测每个信道的最大接收功率电平,并且找到具有最大电平的天线。 在分集传输控制中,确定所有信道的最大接收电平是否等于或高于预定电平。 如果所有信道的最大接收电平等于或高于预定电平,则执行普通分集控制。 具体地,通过信道特有的发射机,从具有最大接收功率电平的天线发送各个信道的发送信号。 如果任何一个信道的最大接收电平是预定电平或更低,则经由辅助发射机从具有信道的第二高接收功率电平的天线发送相关信道的传输信号。除了普通的分集 控制。