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1.发明授权Method and system for DC offset correction of a quadrature modulated RF signal 有权用于正交调制RF信号的直流偏移校正的方法和系统公开(公告)号：US06434204B1
公开(公告)日：2002-08-13
申请号：US09262260
申请日：1999-03-04
IPC分类号： H03D104
CPC分类号： H04L27/2071 , H04L2027/0016 , H04L2027/0018
摘要： The DC offset error of a quadrature modulated RF signal is corrected by introducing a specific trial offset correction value, D, into the DC offset correction circuits 3, 4 or 5 times, by measuring the carrier power resulting from each trial introduction, and by using the information to determine the DC offset correction components, Icor and Qcor. According to an ideal case first embodiment, specific offset D is employed in three different measurement combinations to determine the correction factors Icor and Qcor. According to an alternative embodiment, a fourth offset correction measurement, needed to estimate a single offset control scale factor, is used to account for an unknown power scale factor A. According to a second alternative embodiment, five offset correction measurements are used to account for separate offset control scale factors for the I and Q channels.
摘要翻译： 正交调制RF信号的DC偏移误差通过将特定的试验偏移校正值D引入到DC偏移校正电路3,4或5次中，通过测量每个试用引入的载波功率，并通过使用 该信息确定DC偏移校正组件，Icor和Qcor。 根据理想情况第一实施例，在三种不同的测量组合中采用特定偏移量D来确定校正因子Icor和Qcor。 根据替代实施例，用于估计单个偏移控制比例因子所需的第四偏移校正测量用于考虑未知功率标度因子A.根据第二替代实施例，使用五个偏移校正测量来计算 单独的偏移控制比例因子为I和Q通道。
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2.发明授权Method and system for correcting phase and amplitude imbalances of a quadrature modulated RF signal 有权用于校正正交调制RF信号的相位和幅度不平衡的方法和系统公开(公告)号：US06512800B1
公开(公告)日：2003-01-28
申请号：US09267280
申请日：1999-03-12
IPC分类号： H04K102
CPC分类号： H04L27/364
摘要： A method for correcting the phase and amplitude imbalance of a quadrature modulated RF signal requires that errors be induced in both amplitude, &rgr;, and in phase &phgr; in at least three different combinations in order to determine the appropriate correction value for amplitude and phase offsets &Dgr; and &thgr;e. According to a first embodiment the same &rgr; and &phgr; offsets applied in three different combinations to determine the necessary &Dgr; and &thgr;e corrections. According to a second embodiment, a fourth measurement is made in order to determine an unknown control scale factor for balance adjustments.
摘要翻译： 用于校正正交调制RF信号的相位和幅度不平衡的方法要求在至少三种不同组合中的振幅，rho和相位phi中都会引起误差，以便确定振幅和相位偏移的适当校正值DELTA 和thetae。 根据第一实施例，以三种不同的组合应用相同的rho和phi偏移量来确定必要的DELTA和θe校正。 根据第二实施例，进行第四测量以便确定用于平衡调整的未知控制比例因子。
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公开(公告)号：US3993193A
公开(公告)日：1976-11-23
申请号：US541681
申请日：1975-01-16
IPC分类号： B65H29/60 , G06K13/04 , G06K13/067 , B07C5/00
CPC分类号： G06K13/067 , B65H29/60 , G06K13/04 , B65H2701/1912
摘要： A document sorting system employing a plurality of elongated flexible strips which form document transport channels therebetween and which terminate at a plurality of sorting areas. A magnetic apparatus is provided for selectively deflecting the ends of the flexible strips to form an appropriate channel entrance for the document to be sorted. A coil member is attached to the said end of each flexible strip and current is sent through the coil of the coil members. The coil members are disposed for movement on a piece of the magnetic apparatus and current through the coils of the coil members cooperate with the magnetic field produced by the magnetic apparatus to selectively deflect the coil members and the ends of the flexible strips. The coils of the coil members are connected in a circuit which determines the direction of the current flow in each of the coils. An electronic system is provided for selectively activating activatable document receiving means which are located at the end of each channel and for indicating when missort errors have occurred.
摘要翻译： 一种采用多个细长的柔性条的文件分拣系统，其在它们之间形成文件传送通道，并且终止于多个分拣区域。 提供磁性装置用于选择性地偏转柔性条的端部以形成用于待分类的文件的适当的通道入口。 线圈构件附接到每个柔性带的所述端部，并且电流通过线圈构件的线圈传送。 线圈构件设置成在一个磁性装置上移动，并且通过线圈构件的线圈的电流与由磁性装置产生的磁场协调，以选择性地偏转线圈构件和柔性带的端部。 线圈构件的线圈被连接在确定每个线圈中的电流的方向的电路中。 提供电子系统用于选择性地激活位于每个通道的末端的可激活的文档接收装置，并用于指示何时发生了错误错误。
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