Acquisition, Tracking and Mitigating Multipath Using the Proposed Split Spectrum C/A-Code at L2

A. J. Van Dierendonck, Monty Schumpert, Pat Fenton

Abstract:	In the past few months, a new civil signal has been proposed at the GPS L2 frequency. Many forms of this new signal have been proposed. In order to provide separation from the military P/Y-Code signal at L2, one proposal for this new signal has a "split" spectrum so as to "straddle" the P/Y-Code to operate in P/Y-Code spectral nulls. In this paper, the performance issues regarding this proposed "Split C/A-Code" signal are addressed in detail, acquisition strategies are outlined and multipath mitigation characteristics are described. A candidate receiver implementation is presented. The effects of multipath and corresponding multipath mitigation are also presented and compared with standard C/A-Code multipath effects and various multipath mitigation techniques currently used with the standard code. Tracking accuracy using the split spectrum signal is also evaluated. Although this "Split C/A-Code" signal may not be the selected civil signal modulation for the L2 frequency, it may have merit for use at other frequencies. This is because it could provide better spectral efficiency with respect to accuracy requirements. This prospect is also addressed.
Published in:	Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998) September 15 - 18, 1998 Nashville, TN
Pages:	1895 - 1903
Cite this article:	Van Dierendonck, A. J., Schumpert, Monty, Fenton, Pat, "Acquisition, Tracking and Mitigating Multipath Using the Proposed Split Spectrum C/A-Code at L2," Proceedings of the 11th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GPS 1998), Nashville, TN, September 1998, pp. 1895-1903.
Full Paper:	ION Members/Non-Members: 1 Download Credit Sign In