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公开(公告)号：US20150319725A1
公开(公告)日：2015-11-05
申请号：US14700086
申请日：2015-04-29
申请人： u-blox AG
CPC分类号： H04W56/0015 , G01S5/02 , G01S19/23 , G01S19/246 , G01S19/42 , G04R40/06
摘要： A method and apparatus for determining a drift between a local clock of a movable device and a reference clock that is used by one or more reference devices. The local clock may be calibrated at a calibration location and then the movable device may be moved to an operating location that is different from the calibration location. The drift is determined by observing one or more signals transmitted by the respective one or more reference devices, when the device is at the calibration location and when it is at the operating location. These observations are used together with a model of the signals to determine the drift.
摘要翻译： 一种用于确定可移动装置的本地时钟与由一个或多个参考装置使用的参考时钟之间的漂移的方法和装置。 可以在校准位置校准本地时钟，然后可移动装置可以移动到与校准位置不同的操作位置。 漂移是通过观察由相应的一个或多个参考装置发射的一个或多个信号，当装置在校准位置时以及当它在操作位置时确定的。 这些观察结果与信号模型一起使用以确定漂移。
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公开(公告)号：US07288974B2
公开(公告)日：2007-10-30
申请号：US10938120
申请日：2004-09-10
申请人： Kenji Ozawa
发明人： Kenji Ozawa
IPC分类号： H03L7/06
摘要： A wave correction clock of the present invention receives a wave signal including time information based on information defined by a pulse width of a rectangular pulse output at a predetermined period, and a period measuring section measures a signal period TRn of the rectangular pulse. A time difference measuring section obtains a time difference between the signal period TRn and an internal reference period TB where the signal period TRn is within a predetermined range, and a time difference determining section corrects generation timing of a reference pulse at the internal reference period TB from an average value of time differences obtained when the rectangular pulse where the signal period TRn is within a predetermined range is detected multiple times.
摘要翻译： 本发明的波形校正时钟基于由预定周期输出的矩形脉冲的脉冲宽度定义的信息，接收包括时间信息的波形信号，周期测量部分测量矩形脉冲的信号周期TRn。 时间差测量部分获得信号周期TRn和信号周期TRn在预定范围内的内部参考周期TB之间的时间差，时间差确定部分校正内部参考周期TB的参考脉冲的产生定时 从信号周期TRn在预定范围内的矩形脉冲获得的时间差的平均值被检测多次。
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公开(公告)号：US07260026B1
公开(公告)日：2007-08-21
申请号：US11556812
申请日：2006-11-06
申请人： Yeong-wei A. Wu
发明人： Yeong-wei A. Wu
摘要： Time-of-day tracking with INS input is described. In one embodiment, a range rate and a range acceleration is generated from inertial navigation system data received from a moveable platform (e.g. an airborne platform). A time and frequency estimation filter receives the range rate, the range acceleration and a timing-based error signal from a time discriminator, and can then generate a time-of-day correction signal and a frequency correction signal. A time-of-day generator receives the time-of-day correction signal and generates a time-of-day correction, and a clock frequency generator receives the frequency correction signal and generates a frequency correction. The time discriminator receives a satellite synchronization signal from a satellite, the time-of-day correction from the time-of-day generator, and the frequency correction from the clock frequency generator. The time discriminator initially generates the timing-based error signal from the satellite synchronization signal, and subsequently generates the timing-based error signal from the time-of-day correction and the frequency correction to synchronize the satellite with the moveable platform.
摘要翻译： 描述了INS输入的时间跟踪。 在一个实施例中，从从可移动平台（例如机载平台）接收的惯性导航系统数据产生范围速率和范围加速度。 时间和频率估计滤波器从时间鉴别器接收范围速率，范围加速度和基于定时的误差信号，并且然后可以产生日时校正信号和频率校正信号。 时间发生器接收时间校正信号并产生日时校正，时钟频率发生器接收频率校正信号并产生频率校正。 时间鉴别器从卫星接收卫星同步信号，从日时钟发生器接收时间校正以及来自时钟频率发生器的频率校正。 时间鉴别器最初从卫星同步信号产生基于定时的误差信号，随后从日时校正和频率校正产生基于时序的误差信号，以使卫星与可移动平台同步。
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44.发明申请公开(公告)号：US20030219039A1
公开(公告)日：2003-11-27
申请号：US10402003
申请日：2003-03-28
发明人： Isao Oguchi
IPC分类号： H04J003/06
摘要： A radio wave correction timepiece has an antenna 21 for receiving external radio information including time information consisting of external time data, a reception circuit 22, and a time counter 53 for producing internal time data. A control circuit 24 has a comparison circuit 54 for determining the difference between received external time data and internal time data, and outputting a difference data value. A reception information storage unit 71 stores at least a plurality of data sets, each consisting of received external time data and its resultant difference data value. A correction calculation unit 62 calculates an estimated correction value using the plurality of stored data sets, and the elapsed time from the last reception. An internal time correction control unit 61 corrects the internal time using the estimated correction value.
摘要翻译： 无线电波校正钟表具有用于接收外部无线电信息的天线21，该外部无线电信息包括由外部时间数据组成的时间信息，接收电路22和用于产生内部时间数据的时间计数器53。 控制电路24具有比较电路54，用于确定接收到的外部时间数据与内部时间数据之间的差异，并输出差分数据值。 接收信息存储单元71存储至少多个数据组，每个数据组由接收的外部时间数据及其合成的差分数据值组成。 校正计算单元62使用多个存储的数据集以及从最后接收的经过时间来计算估计校正值。 内部时间校正控制单元61使用估计校正值校正内部时间。
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45.发明授权System and method for synchronizing clocks in a plurality of devices across a communication channel 失效用于在通信信道上同步多个设备中的时钟的系统和方法公开(公告)号：US06236623B1
公开(公告)日：2001-05-22
申请号：US09179678
申请日：1998-10-16
申请人： James F. Read , Leonard W. Moore
发明人： James F. Read , Leonard W. Moore
IPC分类号： G04C1100
CPC分类号： H04J3/0638 , G04R20/02 , G04R40/02 , G04R40/06 , H04J3/0682
摘要： A system and method is disclosed for synchronizing clocks in a plurality of devices connected by a communication channel. A master control device is coupled to one or more slave control devices, e.g., event recorders, across a communication channel. Preferably, the communication channel is implemented according to an RS-485 interface. By periodically interrogating and monitoring the responses of each of the slave control devices, the master control device determines the transit time, i.e., communication, delays to each of the slave control devices. Operating in conjunction with this data, the master control device can then interpret and/or adjust any event times reported by the event recorders to improve the relative time accuracy of the event recorders as compared to a time maintained by the master control device. Consequently, the control system can achieve a relative time synchronization accuracy between the master and slave times to within 100 microseconds and preferably 100 nanoseconds or less.
摘要翻译： 公开了一种用于同步通过通信信道连接的多个设备中的时钟的系统和方法。 主控制设备通过通信信道耦合到一个或多个从控制设备，例如事件记录器。 优选地，根据RS-485接口实现通信信道。 通过周期性地询问并监视每个从控制装置的响应，主控制装置确定每个从控制装置的通行时间，即通信延迟。 与该数据结合操作，主控制装置随后可解释和/或调整由事件记录器报告的任何事件时间，以提高事件记录器相对于由主控制装置维持的时间的相对时间精度。 因此，控制系统可以实现主从时间之间的相对时间同步精度在100微秒内，优选为100纳秒以内。
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公开(公告)号：US5826066A
公开(公告)日：1998-10-20
申请号：US694073
申请日：1996-08-08
申请人： Robert L. Jardine , Hossein Moiin
发明人： Robert L. Jardine , Hossein Moiin
摘要： A computing system develops time/date values by using a free-running counter to measure and accumulate increments of time. The increments of time are converted from the resolution of the free-running counter to that used for the time and date values by dividing by a conversion variable and then used to update the time/date value. The accuracy of the time/date value is monitored by periodically comparing the rate of the free-running counter to the rate of a more accurate, external clock. The ratio of these two rates is used to adjust the conversion variable. The conversion variable reflects any differences between (1) the rate of change of the increments of time used for developing the time/data value and (2) the external clock. Its use here, therefore, will operate to either slow down or speed up the rate of change of the time/date value so that it more closely tracks the external clock.
摘要翻译： 计算系统通过使用自由运行的计数器来测量和累加时间增量来制定时间/日期值。 时间增量由自由运行计数器的分辨率转换为通过转换变量除以时间和日期值的分辨率，然后用于更新时间/日期值。 通过周期性地比较自由运行计数器的速率与更准确的外部时钟的速率来监视时间/日期值的精度。 这两个比率的比率用于调整转换变量。 转换变量反映了（1）用于开发时间/数据值的时间增量变化率与（2）外部时钟之间的差异。 因此，这里的使用将会减慢或加快时间/日期值的变化速度，以便更紧密地跟踪外部时钟。
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公开(公告)号：US5740129A
公开(公告)日：1998-04-14
申请号：US597619
申请日：1996-02-06
申请人： Simon Frampton
发明人： Simon Frampton
CPC分类号： H04W52/029 , G04R40/02 , G04R40/06 , H04W56/0035
摘要： A real time clock is arranged to generate output signals indicative of time of day. An oscillating device (101) produces a first clocking signal which is adjusted in response to a calibration value to produce an output clocking signal. A processor (102) re-calculates the calibration value in response to external clocking signals received from a cellular base station for mobile telephones. The clock may be provided within a mobile telephone and the oscillating device may also be used to provide sleep clock signals allowing a high frequency system clock to be de-activated for periods while the telephone is in a stand-by condition.
摘要翻译： 布置实时时钟以产生指示一天中的时间的输出信号。 振荡装置（101）产生第一时钟信号，其响应于校准值而被调整以产生输出时钟信号。 响应于从用于移动电话的蜂窝基站接收的外部时钟信号，处理器（102）重新计算校准值。 时钟可以设置在移动电话中，并且振荡装置还可以用于提供睡眠时钟信号，从而允许高频系统时钟在电话处于待机状态的期间被取消激活。
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公开(公告)号：US5739762A
公开(公告)日：1998-04-14
申请号：US414489
申请日：1995-03-31
申请人： Hiroyasu Kuramatsu , Kazuo Morita
发明人： Hiroyasu Kuramatsu , Kazuo Morita
IPC分类号： H04L7/00 , G04G3/02 , G08B5/22 , H04B7/26 , H04W56/00 , H04W84/02 , H04W88/02 , H04B1/00 , H04B7/00 , H04B7/24
摘要： A radio selective calling receiver which can improve the precision of a timepiece up to the clock precision of a reception signal from a base station is provided. A bit synchronization section establishes bit synchronization of a digital signal from a reception section to output a reproduction clock. A frequency divider for a timepiece function frequency-divides a reference clock with insufficient precision, which is supplied from a reference clock generation section, by a fixed value while the digital signal is in a frame step-out state. While the digital signal is in a frame synchronized state, the frequency divider variably frequency-divides the reference clock by using a phase correction signal for correcting an internal phase advance/delay, which is output from the bit synchronization section, thereby correcting a gain/loss in time displayed on a display section.
摘要翻译： 提供一种无线电选呼接收机，其可以提高从基站接收信号的时钟精度的时钟精度。 位同步部分建立来自接收部分的数字信号的位同步，以输出再现时钟。 时钟功能频率分频器在数字信号处于帧输出状态时，将从参考时钟产生部分提供的精度不足的参考时钟分频为固定值。 当数字信号处于帧同步状态时，分频器通过使用用于校正从位同步部分输出的内部相位提前/延迟的相位校正信号来可变地对参考时钟进行分频，从而校正增益/ 在显示部分显示的时间损失。
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公开(公告)号：US4823328A
公开(公告)日：1989-04-18
申请号：US161792
申请日：1988-02-29
申请人： Charles C. Conklin , Michael W. Faber , David Schachter , Philip M. Spira , Chi-Wen Wang , Paul L. Williams
发明人： Charles C. Conklin , Michael W. Faber , David Schachter , Philip M. Spira , Chi-Wen Wang , Paul L. Williams
摘要： A radio signal controlled clock which decodes time information in a radio signal and thereby determines the current time. The clock collects and stores radio signal data as soon as a reasonably decodeable radio signal is located, even before the minute boundary of the radio signal's time base has been located. This data is stored and later used for decoding and verifying the digits of the time information after the minute boundary has been located. In another aspect of the present invention, an internal counter in the clock is periodically resynchronized with the radio signal, and the average of the adjustments required for this resynchronization is maintained. When no radio signal is available, or the radio signal is too noisy to be reliably decoded, the average internal counter adjustment value is used to periodically adjust the internal counter--and thereby helps to keep the clock's internal counter as closely synchronized with the radio signal's time bases as possible when the radio signal is not available or not usable.
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50.发明授权
公开(公告)号：US4768178A
公开(公告)日：1988-08-30
申请号：US17666
申请日：1987-02-24
申请人： Charles C. Conklin , Stephen O. Jeppson , Ronald W. Mongeon , David Schachter , Philip M. Spira , Paul L. Williams
发明人： Charles C. Conklin , Stephen O. Jeppson , Ronald W. Mongeon , David Schachter , Philip M. Spira , Paul L. Williams
摘要： A method and apparatus for synchronizing a clock to broadcast time-based signals, said time-based signals including encoded timing information, the method comprising the steps ofreceiving said time-based signals,decoding said time-based signals to derive a plurality of digits from said timing information representing actual clock time, andseparately verifying the correctness of each of said digits, said correctness verifying step including the steps of separately comparing each said derived digit with at least one corresponding previously decoded derived digit and verifying said derived digit when it meets a predefined verification test based on the consistency of said derived digit with said at least once corresponding previously decoded derived digit, repeating said comparison and verifying steps as said time-based signals are decoded until each said derived digit has been separately verified, and generating a lockon signal when all of said derived digits have been verified.
摘要翻译： 一种用于将时钟同步到广播基于时间的信号的方法和装置，所述基于时间的信号包括编码定时信息，所述方法包括以下步骤：接收所述基于时间的信号，解码所述基于时间的信号以导出多个数字 从表示实际时钟时间的所述定时信息中分别验证每个所述数字的正确性，所述正确性验证步骤包括以下步骤：将每个所述导出的数字与至少一个对应的先前解码的导出数字进行分开比较， 基于所述导出的数字与所述至少一次对应的先前解码的导出数字的一致性来满足预定义的验证测试，重复所述比较和验证步骤，因为所述基于时间的信号被解码，直到每个所述派生的数字已被单独验证，并且生成 当所有所述派生数字已被验证时，锁定信号。
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