公开(公告)号：WO1997020408A1

公开(公告)日：1997-06-05

申请号：PCT/US1996017861

申请日：1996-11-05

Applicant: MOTOROLA INC.

Inventor： MOTOROLA INC. ,  BURKE, Timothy, M. ,  MANNETTE, Michael ,  BAHARY, Rob

IPC: H04J03/14

CPC classification number: H04H60/94 ,  H04H60/97 ,  H04J3/0682 ,  H04L12/2801

Abstract: A method for synchronizing timing of signal transmissions in a telecommunication system (100) determines a "fixed portion" (222) of the propagation delay between the central unit (102) and subscribers (206, 208) in a particular node (202). Any of the subscriber units with respect to the telecommunications system (100) may be implemented using the general subscriber cable access unit (CAU) (700). The CAU (700) includes an RF transceiver (702) that includes a cable interface (704), an UP converter (706), a modulator (708), and a DOWN converter (710). The cable interface (704) provides an interface to either coaxial or fiber-optic cables, whereby RF signals from the UP converter (706) are placed on the spokes (510) and RF signals from the spokes (510) are downloaded to the DOWN converter (710). The modulator (708) processes digital signals into analog signals that are converted to their proper frequency for transmission by the UP converter (706).

Abstract translation: 用于同步电信系统（100）中的信号传输定时的方法确定特定节点（202）中的中央单元（102）和用户（206,208）之间的传播延迟的“固定部分”（222）。 关于电信系统（100）的任何用户单元可以使用通用用户电缆接入单元（CAU）（700）来实现。 CAU（700）包括RF收发器（702），其包括电缆接口（704），UP转换器（706），调制器​​（708）和DOWN转换器（710）。 电缆接口（704）提供到同轴或光纤电缆的接口，由此来自UP转换器（706）的RF信号被放置在辐条（510）上，并且来自轮辐（510）的RF信号被下载到DOWN 转换器（710）。 调制器（708）将数字信号处理成模拟信号，该模拟信号被转换成适当的频率以供UP转换器（706）传输。