Patent ID: 7295156
Filing Date: 2007-11-13
Classification: G01S

Abstract:
1. A location system, comprising: a mobile radio transceiver for transmitting a radio positioning signal and receiving a radio system signal having a radio positioning system (RPS)-based time and an RPS-based position jointly derived from said radio positioning signal; and a mobile global navigation satellite system (GNSS) receiver including a code range selector using said RPS-based time and said RPS-based position for selecting a code search range and a code recovery circuit using said code search range for acquiring a GNSS signal; and wherein: the code range selector includes a bootstrap clock for determining an elapsed time from a time-of-transmission (TOT) of said radio positioning signal and a GNSS time estimator for using said elapsed time and said RPS-based time for providing an RPS-based GNSS time estimate; and the code range selector uses said RPS-based GNSS time estimate for selecting said code search range.