公开(公告)号：US08184046B2

公开(公告)日：2012-05-22

申请号：US12562099

申请日：2009-09-17

Applicant: Jacqueline Peta Bickerstaff ,  Esther Olulu Anyaegbu ,  Peter Mark Fleming ,  Gerald Whitworth

Inventor： Jacqueline Peta Bickerstaff ,  Esther Olulu Anyaegbu ,  Peter Mark Fleming ,  Gerald Whitworth

IPC: G01S19/25

CPC classification number: G01S19/42 ,  G01S5/0205 ,  G01S19/258

Abstract: A time reference system for generating a time reference from signals produced by a global navigation satellite constellation has a satellite signal receiver to receive and down-convert code-modulated signals from a plurality of satellites and a correlator to track and decode the down-converted signals to provide signals containing partial pseudo-range measurements for respective satellites. A data processing arrangement receives assistance data from an external source and performs data-bit synchronization in which bit edges of a low frequency data bit stream carried by the received satellite signals are identified, to perform a preliminary position-velocity-time solution to provide an approximate time reference, and to perform auto-correlation of pre-selected data sequences in the data stream to resolve time ambiguities thereby to compute a precise time reference signal in weak received signal conditions. The pre-selected data sequences may be the repeated data preamble in the GPS navigation message constituted by the data stream.

Abstract translation: 用于从由全球导航卫星星座产生的信号产生时间参考的时间参考系统具有卫星信号接收机，用于接收和降频来自多个卫星的码调制信号和相关器，以跟踪和解码下变频信号 以提供包含用于各个卫星的部分伪距测量的信号。 数据处理装置从外部源接收辅助数据，并执行数据位同步，其中识别由接收到的卫星信号携带的低频数据比特流的比特边，以执行初步位置 - 速度 - 时间解，以提供 近似时间参考，并且在数据流中执行预选数据序列的自相关以解决时间模糊度，从而在弱接收信号条件下计算精确的时间参考信号。 预先选择的数据序列可以是由数据流构成的GPS导航消息中的重复数据前导码。

公开(公告)号：US20140375494A1

公开(公告)日：2014-12-25

申请号：US14309985

申请日：2014-06-20

Applicant: Peter FLEMING ,  Geraint FFOULKES-JONES ,  Gerald WHITWORTH

Inventor： Peter FLEMING ,  Geraint FFOULKES-JONES ,  Gerald WHITWORTH

IPC: G01S19/22 ,  G01S19/47 ,  G01S19/46

CPC classification number: G01S19/428 ,  G01S5/0273 ,  G01S19/22 ,  G01S19/26 ,  G01S19/28 ,  G01S19/46 ,  G01S19/47 ,  G01S19/52

Abstract: A positioning system operates by first determining that a user is pedestrian, and then estimating a speed of the user. Having tracked a first signal from one radio transmitter whose position is known, the system attempts to detect additional signals from the one transmitter, in a search space such that the first signal and the or each additional signal are consistent with the estimated speed of the user and with one or more of the signals having been reflected off a reflector in the vicinity of the user. One or more detected additional signals from the one transmitter are then tracked, and candidate measurements, derived from the first signal and the one or more detected additional signals, are provided for use when estimating the position and/or velocity of the user.

Abstract translation: 定位系统通过首先确定用户是行人，然后估计用户的速度来操作。 已经从已知位置的一个无线电发射机追踪到第一信号，系统试图在搜索空间中检测来自一个发射机的附加信号，使得第一信号和每个附加信号与用户的估计速度一致 并且一个或多个信号已经从用户附近的反射器反射出来。 然后跟踪来自一个发射机的一个或多个检测到的附加信号，并且提供从第一信号和一个或多个检测到的附加信号导出的候选测量值，以便在估计用户的位置和/或速度时使用。

公开(公告)号：US20140292568A1

公开(公告)日：2014-10-02

申请号：US14225668

申请日：2014-03-26

Applicant: PETER FLEMING ,  GERALD WHITWORTH ,  ESTHER OLULU ANYAEGBU

Inventor： PETER FLEMING ,  GERALD WHITWORTH ,  ESTHER OLULU ANYAEGBU

IPC: G01S19/48

CPC classification number: G01S5/0226 ,  G01S5/0045 ,  H04W56/00

Abstract: A radiobeacon station is described comprising: a satellite receiver configured to receive satellite navigation data from a satellite; a timing circuit configured to determine a timing scheme based on the satellite navigation data; and a terrestrial transmitter configured to transmit a plurality of beacon signals based on the determined timing scheme.

Abstract translation: 描述了一种无线电报警站，包括：卫星接收机，被配置为从卫星接收卫星导航数据; 定时电路，被配置为基于所述卫星导航数据确定定时方案; 以及被配置为基于所确定的定时方案来发送多个信标信号的地面发射机。

公开(公告)号：US06795487B1

公开(公告)日：2004-09-21

申请号：US09473454

申请日：1999-12-28

Applicant: Jacqueline Peta Bickerstaff ,  Gerald Whitworth

Inventor： Jacqueline Peta Bickerstaff ,  Gerald Whitworth

IPC: H04L2730

CPC classification number: G01S19/30 ,  G01S19/22 ,  H04B1/7115

Abstract: A positioning or timing receiver, for receiving pseudo-noise encoded signals includes mask mixers in the main signal paths, prior to accumulators. The mask mixers are fed with mask signals having a period equal to the period of the pseudo-noise code, provided by a mask generator. The mask generator and mixers provide an extra level of functionality in the receiver, through which a large number of uses can be made. For example, without modifying a code signal mixed into the main signal path, the mask mixers allow dynamic adaptability from a wide correlator to a narrow correlator by simple control of the mask generator. Many different discrimination patterns can be obtained. By changing the mask signals and examining correlator outputs, it is possible to detect whether a signal being tracked contains a multipath component. The receiver also includes a switch, whereby two correlators may be fed with signals from the in-phase main signal path.

Abstract translation: 用于接收伪噪声编码信号的定位或定时接收器包括在主信号路径内的掩模混频器，在累加器之前。 掩模混合器被馈送具有等于由掩模发生器提供的伪噪声代码的周期的​​屏蔽信号。 掩模发生器和混合器在接收器中提供了额外的功能级别，通过该功能可以进行大量的使用。 例如，在不修改混合到主信号路径中的码信号的情况下，掩模混频器通过对掩码生成器的简单控制，允许从宽相关器到窄相关器的动态适应性。 可以获得许多不同的辨别模式。 通过改变掩模信号并检查相关器输出，可以检测正被跟踪的信号是否包含多径分量。 接收机还包括一个开关，由此可以向两个相关器馈送来自同相主信号路径的信号。

公开(公告)号：US20150063342A1

公开(公告)日：2015-03-05

申请号：US14273741

申请日：2014-05-09

Applicant: GERALD WHITWORTH ,  RUI ZUO

Inventor： GERALD WHITWORTH ,  RUI ZUO

IPC: G01S19/01 ,  H04B7/185 ,  H04L7/00

CPC classification number: G01S19/01 ,  G01S19/243 ,  H04B7/185 ,  H04L7/0033

Abstract: A method for collecting a satellite data stream is disclosed. The method includes: receiving satellite signals; storing the received satellite signals; completing bit synchronization and subframe synchronization of the received satellite signals; recovering a portion of the satellite data stream from the satellite signals stored prior to completing bit synchronization and subframe synchronization.

Abstract translation: 公开了收集卫星数据流的方法。 该方法包括：接收卫星信号; 存储所接收的卫星信号; 完成接收到的卫星信号的比特同步和子帧同步; 从完成比特同步和子帧同步之前存储的卫星信号中恢复卫星数据流的一部分。

公开(公告)号：US20100188286A1

公开(公告)日：2010-07-29

申请号：US12562099

申请日：2009-09-17

Applicant: Jacqueline Peta BICKERSTAFF ,  Esther Olulu ANYAEGBU ,  Peter Mark FLEMING ,  Gerald WHITWORTH

Inventor： Jacqueline Peta BICKERSTAFF ,  Esther Olulu ANYAEGBU ,  Peter Mark FLEMING ,  Gerald WHITWORTH

IPC: G01S19/44 ,  G01S19/03

CPC classification number: G01S19/42 ,  G01S5/0205 ,  G01S19/258

Abstract: A time reference system for generating a time reference from signals produced by a global navigation satellite constellation has a satellite signal receiver to receive and down-convert code-modulated signals from a plurality of satellites and a correlator to track and decode the down-converted signals to provide signals containing partial pseudo-range measurements for respective satellites. A data processing arrangement receives assistance data from an external source and performs data-bit synchronisation in which bit edges of a low frequency data bit stream carried by the received satellite signals are identified, to perform a preliminary position-velocity-time solution to provide an approximate time reference, and to perform auto-correlation of pre-selected data sequences in the data stream to resolve time ambiguities thereby to compute a precise time reference signal in weak received signal conditions. The pre-selected data sequences may be the repeated data preamble in the GPS navigation message constituted by the data stream.

Abstract translation: 用于从由全球导航卫星星座产生的信号产生时间参考的时间参考系统具有卫星信号接收机，用于接收和降频来自多个卫星的码调制信号和相关器，以跟踪和解码下变频信号 以提供包含用于各个卫星的部分伪距测量的信号。 数据处理装置从外部源接收辅助数据，并执行数据位同步，其中识别由接收到的卫星信号携带的低频数据比特流的比特边，以执行初步位置 - 速度 - 时间解，以提供 近似时间参考，并且在数据流中执行预选数据序列的自相关以解决时间模糊度，从而在弱接收信号条件下计算精确的时间参考信号。 预先选择的数据序列可以是由数据流构成的GPS导航消息中的重复数据前导码。