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。

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。