Achieving Theoretical Bounds for Receiver-Based Multipath Mitigation Using Galileo OS Signals

L.R. Weill

Abstract:	In the past decade many new GNSS signal structures have been developed to enhance positioning accuracy, notably to reduce ranging errors due to thermal noise and multipath. Examples of these are the new L5 civilian BPSK(10) and L1/L2 BOC(10,5) military signals in the modernized GPS system, and the open-service (OS) E1 BOC(1,1) and E5 ALTBOC(15,10) signals in the developing European Galileo system. The multipath performance of these new signals is enhanced by placing a greater amount of power near the band edges as compared to the legacy GPS L1 BPSK(1) signal. Much work has been done to determine the multipath performance of new signal structures for both Galileo and modernized GPS. However, in almost all cases industry-standard methods of multipath mitigation have been assumed. Multipath performance using these methods falls far short of what is theoretically achievable. In 2002 this author described a technique which reaches theoretical error bounds for modernized GPS signals, yet is practical to implement [1]. The purpose of this paper is to show that the same technology can also produce major improvements with Open Service (OS) Galileo signals in the E1 and E5 bands by reaching theoretical error bounds for both code-based ranging and carrier phase estimation.
Published in:	Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006) September 26 - 29, 2006 Fort Worth Convention Center Fort Worth, TX
Pages:	1035 - 1047
Cite this article:	Weill, L.R., "Achieving Theoretical Bounds for Receiver-Based Multipath Mitigation Using Galileo OS Signals," Proceedings of the 19th International Technical Meeting of the Satellite Division of The Institute of Navigation (ION GNSS 2006), Fort Worth, TX, September 2006, pp. 1035-1047.
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