公开(公告)号：US11823654B2

公开(公告)日：2023-11-21

申请号：US17507869

申请日：2021-10-22

申请人： Harman International Industries, Incorporated

发明人： Tao Feng ,  Tingting Zhou ,  Yuliu Cao

IPC分类号： G10K11/178 ,  H04J3/06 ,  H04L12/40

CPC分类号： G10K11/17827 ,  G10K11/1787 ,  G10K11/17854 ,  H04J3/0617 ,  H04L12/40013 ,  H04L2012/40273

摘要： In at least one embodiment, an active noise cancellation system. The system includes a first controller, a data bus, and a second controller. The first controller receives first information from a plurality of noise sensing devices and second information from an audio system. The first controller employs a time division multiplexing scheme to generate a multiplexed stream of data including the first information and the second information. The data bus transmits the multiplexed stream of data on a single data channel. The second controller receives the multiplexed stream of data on the single data channel and separates the first information from the second information on the multiplexed stream of data to perform ANC functionality.

公开(公告)号：US09537590B2

公开(公告)日：2017-01-03

申请号：US14132978

申请日：2013-12-18

申请人： GENESIS TECHNICAL SYSTEMS CORP.

发明人： Stephen P. Cooke ,  Tino Zottola

IPC分类号： H04J3/06 ,  H04B7/212 ,  H04W4/00 ,  G06K5/00 ,  H04J14/02 ,  H04B1/06 ,  H04L1/24 ,  H04L12/28 ,  H04L12/42 ,  H04M11/06 ,  H04L7/00

CPC分类号： H04J3/0617 ,  H04J3/0638 ,  H04J3/0688 ,  H04L1/242 ,  H04L7/0008 ,  H04L12/2865 ,  H04L12/42 ,  H04M11/062 ,  H04Q2213/13039 ,  H04Q2213/13098 ,  H04Q2213/13106 ,  H04Q2213/1319 ,  H04Q2213/13298 ,  H04Q2213/1336 ,  H04Q2213/13389

摘要： Apparatus and methods relating to synchronization of communication equipment are disclosed. Synchronization information received from a bonded communication link can be used to synchronize local and/or remote communication equipment, such as femtocell sites coupled to nodes in a ring network. This may involve isolating a frequency reference signal from a DSL (Digital Subscriber Line) communication link which is a constituent link of a bonded communication link, for example. In a ring network, received synchronization information could be used in synchronizing a locally connected installation of communication equipment, and passed for transmission in the ring network for synchronizing other communication equipment. Such dropping and passing of an analog frequency reference signal could be applied in networks having other topologies as well. At least some embodiments of the invention are applicable to optical links. One or more dedicated wavelengths of an optical link could be used to transfer a frequency reference signal, for example. Other functions, such as quality monitoring, quality reporting, and/or predictive traffic forwarding may be provided in some embodiments.

摘要翻译： 公开了与通信设备的同步相关的装置和方法。 从绑定通信链路接收的同步信息可用于同步本地和/或远程通信设备，例如耦合到环形网络中的节点的毫微微小区站点。 这可以包括例如从作为绑定通信链路的组成链路的DSL（数字用户线路）通信链路隔离频率参考信号。 在环网中，接收到的同步信息可以用于同步本地连接的通信设备的设备，并且被传递以在环网中进行传输以同步其他通信设备。 模拟频率参考信号的这种丢弃和传递也可以应用于具有其他拓扑的网络中。 本发明的至少一些实施例可应用于光链路。 例如，光链路的一个或多个专用波长可以用于传送频率参考信号。 在一些实施例中可以提供其他功能，例如质量监测，质量报告和/或预测性流量转发。

公开(公告)号：US08565361B2

公开(公告)日：2013-10-22

申请号：US12861786

申请日：2010-08-23

申请人： Philip Secker ,  Peter Croy

发明人： Philip Secker ,  Peter Croy

IPC分类号： H04L7/00

CPC分类号： H04W56/0015 ,  H03L7/08 ,  H03L7/18 ,  H03L2207/50 ,  H04J3/0602 ,  H04J3/0617 ,  H04J3/0638 ,  H04J3/0641 ,  H04J3/0647 ,  H04J3/065 ,  H04J3/0658 ,  H04J3/0679 ,  H04J3/0688

摘要： In some embodiments, a system comprises a clock, a root node, a radio channel network, and first and second child nodes. The clock may be configured to generate a clock signal. The root node may be configured to generate a first frame including a first payload and a first overhead and generate a second frame including a second payload and a second overhead. The first and second overheads may comprise a synchronization value based on the clock signal. The radio channel network may be in communication with the root node for transmitting the first and second frames. Each first and second child nodes may be configured to perform clock recovery including frequency synchronization using the synchronization value and a respective phase-lock loop.

公开(公告)号：US4763324A

公开(公告)日：1988-08-09

申请号：US13066

申请日：1987-02-10

申请人： Theodor Schwierz

发明人： Theodor Schwierz

IPC分类号： H04J3/06 ,  H04L7/04 ,  H04L7/08

CPC分类号： H04J3/0617 ,  H04L7/044

摘要： A method of frame decoding a series data flow having a frame structure containing an item of periodically occurring synchronizing information, employs a frame recognition circuit, which is synchronized to the item of synchronizing information and is coupled to a frame generator. After a predetermined number of synchronous coincidences of the item of synchronizing information and a synchronizing signal emitted from the frame generator, the frame recognition circuit and frame generator are decoupled. During synchronous coincidence, a weighting counter is periodically increased by a predetermined amount, and in the case of non-coincidence it is periodically reduced by a predetermined amount. Resynchronization takes place only when the count of the weighting counter has reached its maximum value and the frame recognition circuit is synchronized to a new item of synchronizing information.

摘要翻译： 对具有包含周期性发生的同步信息的帧结构的串行数据流进行帧解码的方法采用与同步信息同步的帧识别电路，并与帧生成器耦合。 在从帧发生器发出的同步信息项和同步信号的预定数量的同步重合之后，帧识别电路和帧发生器被去耦合。 在同步重合期间，加权计数器周期性地增加预定量，并且在不一致的情况下，周期性地减少预定量。 仅当加权计数器的计数达到其最大值并且帧识别电路与新的同步信息项同步时才发生重新同步。

公开(公告)号：US3936609A

公开(公告)日：1976-02-03

申请号：US442522

申请日：1974-02-14

申请人： Gary C. Waldeck

发明人： Gary C. Waldeck

IPC分类号： H04J3/06 ,  H04J3/14

CPC分类号： H04J3/0617 ,  H04J3/14

摘要： A time division multiplex system includes a status channel as well as a plurality of information channels and a frame synchronization channel in each frame. A submultiplexer combines a "winking" framing pulse with four different status signals to derive a four-state code. One state of the code contains a "winking" submultiplexer framing signal, and the other states transmit status information to control system alarm and restoral conditions.

摘要翻译： 时分复用系统包括每个帧中的状态信道以及多个信息信道和帧同步信道。 子多路复用器将“闪烁”成帧脉冲与四种不同的状态信号组合以得到四态码。 代码的一个状态包含“眨眼”的多路分解器成帧信号，其他状态传送状态信息以控制系统报警和恢复条件。

公开(公告)号：US3541456A

公开(公告)日：1970-11-17

申请号：US3541456D

申请日：1967-12-18

申请人： BELL TELEPHONE LABOR INC

发明人： FEDER HERBERT S

IPC分类号： H03K5/14 ,  H04J3/06 ,  H03K5/20

CPC分类号： H04J3/0617 ,  H03K5/14 ,  H04J3/0602

公开(公告)号：US3440657A

公开(公告)日：1969-04-22

申请号：US3440657D

申请日：1965-08-05

申请人： GEN MOTORS CORP

发明人： CATALDO ROY S

IPC分类号： H04J3/00 ,  H04J3/06

CPC分类号： H04J3/0617 ,  H04J3/00

公开(公告)号：US20240297726A1

公开(公告)日：2024-09-05

申请号：US18314959

申请日：2023-05-10

申请人： FIBER LOGIC COMMUNICATIONS, INC.

发明人： CHE-CHENG KUNG ,  YU-LUN LO

IPC分类号： H04J3/06

CPC分类号： H04J3/0623 ,  H04J3/0617

摘要： A holdover mode device is illustrated. When a time synchronization source is not abnormal, a digital PLL uses a time synchronization source as its input clock, and a measurement and adjustment module calculates a variation of a frequency difference between the time synchronization source and a reference clock output by an adjustable oscillator, and builds a frequency difference prediction model according to the variation of the frequency difference. When the time synchronization source is abnormal, the digital PLL uses a buffered time synchronization source as its input clock, and the measurement and adjustment module uses the frequency difference prediction model to calculate a predicted variation of the frequency difference according to buffered frequency difference values, and generates an adjustment signal for adjusting the reference clock according to the predicted variation of the frequency difference.

公开(公告)号：US11876607B2

公开(公告)日：2024-01-16

申请号：US17986704

申请日：2022-11-14

申请人： Skyworks Solutions, Inc.

发明人： Vivek Sarda

IPC分类号： H04J3/06

CPC分类号： H04J3/065 ,  H04J3/0605 ,  H04J3/0617

摘要： A baseline difference is determined between a slave line card time stamp corresponding to a slave line card frame sync signal and a master line card time stamp corresponding to a master line card frame sync signal. The slave line card generates subsequent slave line card time stamps for subsequent slave line card frame sync signals and the master line card generates subsequent master line card time stamps for subsequent master line card frame sync signals. Current differences are determined between subsequent slave line card time stamps and the subsequent master line card time stamps and the current differences are compared to the baseline difference. When a mismatch difference occurs (current difference differs from the baseline difference), the mismatch difference causes a phase-locked loop in the master line card to be adjusted or an offset to be provided to the master line card time of day counter.

公开(公告)号：US20140105229A1

公开(公告)日：2014-04-17

申请号：US14132978

申请日：2013-12-18

申请人： GENESIS TECHNICAL SYSTEMS CORP.

发明人： Stephen P. Cooke ,  Tino Zottola

IPC分类号： H04J3/06

CPC分类号： H04J3/0617 ,  H04J3/0638 ,  H04J3/0688 ,  H04L1/242 ,  H04L7/0008 ,  H04L12/2865 ,  H04L12/42 ,  H04M11/062 ,  H04Q2213/13039 ,  H04Q2213/13098 ,  H04Q2213/13106 ,  H04Q2213/1319 ,  H04Q2213/13298 ,  H04Q2213/1336 ,  H04Q2213/13389

摘要： Apparatus and methods relating to synchronization of communication equipment are disclosed. Synchronization information received from a bonded communication link can be used to synchronize local and/or remote communication equipment, such as femtocell sites coupled to nodes in a ring network. This may involve isolating a frequency reference signal from a DSL (Digital Subscriber Line) communication link which is a constituent link of a bonded communication link, for example. In a ring network, received synchronization information could be used in synchronizing a locally connected installation of communication equipment, and passed for transmission in the ring network for synchronizing other communication equipment. Such dropping and passing of an analog frequency reference signal could be applied in networks having other topologies as well. At least some embodiments of the invention are applicable to optical links. One or more dedicated wavelengths of an optical link could be used to transfer a frequency reference signal, for example. Other functions, such as quality monitoring, quality reporting, and/or predictive traffic forwarding may be provided in some embodiments.

摘要翻译： 公开了与通信设备的同步相关的装置和方法。 从绑定通信链路接收的同步信息可用于同步本地和/或远程通信设备，例如耦合到环形网络中的节点的毫微微小区站点。 这可以包括例如从作为绑定通信链路的组成链路的DSL（数字用户线路）通信链路隔离频率参考信号。 在环网中，接收到的同步信息可以用于同步本地连接的通信设备的设备，并且被传递以在环网中进行传输以同步其他通信设备。 模拟频率参考信号的这种丢弃和传递也可以应用于具有其他拓扑的网络中。 本发明的至少一些实施例可应用于光链路。 例如，光链路的一个或多个专用波长可以用于传送频率参考信号。 在一些实施例中可以提供其他功能，例如质量监测，质量报告和/或预测性流量转发。