公开(公告)号：WO2007076539A3

公开(公告)日：2008-06-05

申请号：PCT/US2006062732

申请日：2006-12-29

Applicant: CENTRALITY COMMUNICATIONS INC ,  WANG CHI-SHIN ,  QIU ZONGDE ,  KUDRETHAYA SHRIDHARA ,  MO JUN

Inventor： WANG CHI-SHIN ,  QIU ZONGDE ,  KUDRETHAYA SHRIDHARA ,  MO JUN

IPC: G01S19/24 ,  G01S19/23 ,  G01S19/27 ,  G01S19/29 ,  G01S19/34

CPC classification number: G01S19/24 ,  G01S19/246 ,  G01S19/27 ,  G01S19/29 ,  G01S19/34

Abstract: The present invention provides GPS receivers capable of tracking very weak GPS signals particularly in an indoor environment without assistance from an external server or a network. In a preferred embodiment, a GPS receiver initially acquires and locks onto GPS satellite signals to compute receiver position outdoors. The GPS receiver then tracks at least one satellite signal indoors to maintain acquisition parameters for quick acquisition of GPS signals. To save power, the receiver automatically goes to the sleep state and periodically wakes up, i.e., powers up, to maintain the at least one satellite signal tracking. During the wakeup state, the receiver collects ephemeris data from the at least one satellite signal when the ephemeris data needs to be updated for quick acquisition of GPS signals.

Abstract translation: 本发明提供了能够跟踪非常弱的GPS信号的GPS接收机，特别是在室内环境中，无需外部服务器或网络的协助。 在一个优选实施例中，GPS接收机最初获取并锁定到GPS卫星信号上以在室外计算接收器位置。 GPS接收机然后在室内跟踪至少一个卫星信号，以维持采集参数，以便快速获取GPS信号。 为了节省电力，接收机自动进入睡眠状态并周期性地唤醒，即上电，以维持至少一个卫星信号跟踪。 在唤醒状态期间，当需要更新星历数据以快速获取GPS信号时，接收器从至少一个卫星信号收集星历数据。

公开(公告)号：WO2007076539A2

公开(公告)日：2007-07-05

申请号：PCT/US2006/062732

申请日：2006-12-29

Applicant: CENTRALITY COMMUNICATIONS, INC. ,  WANG, Chi-Shin ,  QIU, Zongde ,  KUDRETHAYA, Shridhara ,  MO, Jun

Inventor： WANG, Chi-Shin ,  QIU, Zongde ,  KUDRETHAYA, Shridhara ,  MO, Jun

IPC: G01S5/14

CPC classification number: G01S19/24 ,  G01S19/246 ,  G01S19/27 ,  G01S19/29 ,  G01S19/34

Abstract: The present invention provides GPS receivers capable of tracking very weak GPS signals particularly in an indoor environment without assistance from an external server or a network. In a preferred embodiment, a GPS receiver initially acquires and locks onto GPS satellite signals to compute receiver position outdoors. The GPS receiver then tracks at least one satellite signal indoors to maintain acquisition parameters for quick acquisition of GPS signals. To save power, the receiver automatically goes to the sleep state and periodically wakes up, i.e., powers up, to maintain the at least one satellite signal tracking. During the wakeup state, the receiver collects ephemeris data from the at least one satellite signal when the ephemeris data needs to be updated for quick acquisition of GPS signals.

Abstract translation: 本发明提供了能够跟踪非常弱的GPS信号的GPS接收机，特别是在室内环境中，无需外部服务器或网络的协助。 在优选实施例中，GPS接收机最初获取并锁定到GPS卫星信号上以在室外计算接收机位置。 GPS接收机然后在室内跟踪至少一个卫星信号，以维持采集参数，以便快速获取GPS信号。 为了节省电力，接收机自动进入睡眠状态并周期性地唤醒，即上电，以维持至少一个卫星信号跟踪。 在唤醒状态期间，当需要更新星历数据以便快速获取GPS信号时，接收器从至少一个卫星信号收集星历数据。