Reducing multipath tracking errors in spread-spectrum ranging systems

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Reducing multipath tracking errors in spread-spectrum ranging systems

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© The Institution of Electrical Engineers
Published

Analysis of coherent and noncoherent delay lock loops shows that a smaller early-late spacing than the commonly used one chip time reduces multipath tracking errors considerably. The results are especially interesting for spreadspectrum ranging systems such as GPS.

Inspec keywords: distance measurement; satellite relay systems; tracking; spread spectrum communication

Other keywords: coherent delay lock loops; multipath tracking errors; noncoherent delay lock loops; spread-spectrum ranging systems; GPS; early-late spacing

Subjects: Satellite communication systems; Spatial variables measurement

References

    1. 1)
      • van Dierendonck, A.J., Fenton, P., Ford, F.: `Theory and performance of narrow correlator spacing in a GPS receiver', Proc. ION National Technical Meeting, 27 January 1992, San Diego, CA.
    2. 2)
      • A. Polydoros , C.L. Weber . Analysis and optimization of correlative code-tracking loops in spread-spectrum systems. IEEE Trans. , 1 , 30 - 43
    3. 3)
      • R. de Gaudenzi , M. Luise . Decision-directed coherent delay-lock tracking loop for DS-Spread-Spectrum signals. IEEE Trans. , 5 , 758 - 765
    4. 4)
      • van Nee, D.J.R.: `Multipath effects on GPS code phase measurements', Proc. ION GPS-91 Fourth Int. Technical Meeting of the Satellite Division of the Institute of Navigation, 11–13 September 1991, Albuquerque New Mexico, p. 915–924.
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