Method, apparatus and system for synchronizing a cellular communication system to GPS time
一种蜂窝通信系统、蜂窝的技术,应用在导航领域,能够解决基站未装备等问题
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[0052] see now figure 1 A global positioning system (GPS) receiver 10 according to the present invention is shown to include a cellular module 11 (not necessarily providing full cellular communication capability) and a GPS module 12 . The cellular module responds to a cellular communication signal through the cellular antenna 14 . The GPS module includes standard GPS hardware 21 for interpreting GPS ranging signals (including navigation data) received via the GPS antenna 15 after broadcast by a positioning system beacon 27 (e.g. a GPS satellite, but ground-based beacons are also possible). to respond. The cellular module processes cellular communication signals such that time synchronization information is extracted, such as from location measurement unit (LMU) messages, as described above. Cellular communication signals consist of data organized into frames, including delimiters (header and trailer) that enable the cellular module to distinguish one frame from the next. Th...
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