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公开(公告)号：US20160241302A1
公开(公告)日：2016-08-18
申请号：US15136476
申请日：2016-04-22
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhilei Zhao
CPC classification number: H04B3/23 , H03F1/56 , H03F2200/387 , H03F2200/423
Abstract: A copper wire interface circuit is provided, where a current output amplifier is connected to a port impedance component and a transmit end, and the current output amplifier is configured to amplify a to-be-transmitted signal; the port impedance component is connected to a high-pass filter, impedance, after undergoing impedance transformation performed by the high-pass filter, of the port impedance component is used for performing impedance matching with equivalent impedance of a cable and a load; the high-pass filter is connected to the port impedance component and the cable, the high-pass filter is configured to filter the to-be-transmitted signal or a received signal and perform impedance transformation on the port impedance component; and an echo cancellation module is connected to the port impedance component and a receive end.
Abstract translation: 提供了铜线接口电路，其中电流输出放大器连接到端口阻抗部件和发送端，并且电流输出放大器被配置为放大待发送信号; 端口阻抗分量连接到高通滤波器，在由高通滤波器执行的阻抗变换之后，端口阻抗分量的阻抗用于与电缆和负载的等效阻抗进行阻抗匹配; 高通滤波器连接到端口阻抗部件和电缆，高通滤波器被配置为对被发送信号或接收信号进行滤波，并对端口阻抗分量进行阻抗变换; 并且回波消除模块连接到端口阻抗部件和接收端。
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公开(公告)号：US20130148710A1
公开(公告)日：2013-06-13
申请号：US13761568
申请日：2013-02-07
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guijin Xu , Guozhu Long , Ruijie Xiao , Zhilei Zhao , Xuyong Wu , Yuchen Jia
IPC: H04L7/00
CPC classification number: H04L7/0041 , H04J3/0638 , H04M11/062
Abstract: The present invention provides a method, an apparatus, and a system for time synchronization of an xDSL. The method includes: transmitting, by a customer premises equipment, a first symbol to a central office equipment, and obtaining time Ts2 indicating the moment that the first symbol is transmitted; receiving, by the CPE, a second symbol transmitted by the CO, and obtaining time Ts1 indicating the moment that the second symbol is received; obtaining, by the CPE obtains time Tm2 indicating the moment that the first symbol is received by the CO and time Tm1 indicating the moment that the second symbol is transmitted by the CO; the CPE calculates an offset between a clock of the CPE and a clock of the CO according to Ts1, Ts2, Tm1 and Tm2; and the CPE adjusts the clock of the CPE according to the offset to achieve synchronization.
Abstract translation: 本发明提供了一种用于xDSL的时间同步的方法，装置和系统。 该方法包括：由客户驻地设备将第一符号发送到中心局设备，并获得指示发送第一符号的时刻的时间Ts2; 由所述CPE接收由所述CO发送的第二符号，并获得指示接收到所述第二符号的时刻的时间Ts1; 通过CPE获得表示由CO接收到第一符号的时刻的时间Tm2和表示CO发送第二符号的时刻的时间Tm1; CPE根据Ts1，Ts2，Tm1和Tm2计算CPE的时钟与CO的时钟之间的偏移; 并且CPE根据偏移量调整CPE的时钟以实现同步。
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公开(公告)号：US09742463B2
公开(公告)日：2017-08-22
申请号：US15136476
申请日：2016-04-22
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhilei Zhao
CPC classification number: H04B3/23 , H03F1/56 , H03F2200/387 , H03F2200/423
Abstract: A copper wire interface circuit is provided, where a current output amplifier is connected to a port impedance component and a transmit end, and the current output amplifier is configured to amplify a to-be-transmitted signal; the port impedance component is connected to a high-pass filter, impedance, after undergoing impedance transformation performed by the high-pass filter, of the port impedance component is used for performing impedance matching with equivalent impedance of a cable and a load; the high-pass filter is connected to the port impedance component and the cable, the high-pass filter is configured to filter the to-be-transmitted signal or a received signal and perform impedance transformation on the port impedance component; and an echo cancellation module is connected to the port impedance component and a receive end.
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公开(公告)号：US10135602B2
公开(公告)日：2018-11-20
申请号：US13761568
申请日：2013-02-07
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guijin Xu , Guozhu Long , Ruijie Xiao , Zhilei Zhao , Xuyong Wu , Yuchen Jia
Abstract: The present invention provides a method, an apparatus, and a system for time synchronization of an xDSL. The method includes: transmitting, by a customer premises equipment, a first symbol to a central office equipment, and obtaining time Ts2 indicating the moment that the first symbol is transmitted; receiving, by the CPE, a second symbol transmitted by the CO, and obtaining time Ts1 indicating the moment that the second symbol is received; obtaining, by the CPE obtains time Tm2 indicating the moment that the first symbol is received by the CO and time Tm1 indicating the moment that the second symbol is transmitted by the CO; the CPE calculates an offset between a clock of the CPE and a clock of the CO according to Ts1, Ts2, Tm1 and Tm2; and the CPE adjusts the clock of the CPE according to the offset to achieve synchronization.
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