Multipath Mitigation Performance Comparison of Strobe Correlators in GNSS Receivers
نویسندگان
چکیده
This paper introduces effective methods of decreasing multipath errors by utilizing strobe correlators designed for GPS coarse-acquisition (C/A) code for future modernized signals including the BOC (n,n) modulation used for GPS L1C, Galileo E1 and the GLONASS new CDMA signal. The implementation and performance of different types of strobes are compared and discussed. The strobe concept is especially investigated for BOC (n,n), in order to identify a suitable locally generated tailored reference code to produce an unambiguous discriminator function for the receiver Delay Locked Loop. The new strobe correlators produce significant multipath resistance (especially to the medium-delayed multipath interference) and false tracking event elimination. The multipath rejection and tracking performance are quantitatively analyzed and discussed by utilizing a proposed methodology, so the best performing strobe for a particular application can be selected.
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