Method and apparatus for increasing the sensitivity of a global positioning satellite receiver

摘要: Method and apparatus providing enhanced sensitivity for GPS receivers (400, 500, 600, 700) by allowing coherent integration of a correlation over several code periods signal in one embodiment, performing time to frequency domain conversion the output from processor (507) second embodiment. In case which is performed periods, advantage taken fact that CDMA cellular telephone base stations transmit information allows receiver determine before beginning acquisition process. The can be expanded include more than bit period, if takes known patterns are transmitted at particular times within transmission satellite. If no station range, then correlator integrates period used generate values input discrete transform (511). (511) will indicate presence satellite offset between locally generated received signal.