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GNSS Near-Far Mitigation through Subspace Projection without Phase Information

Nunes, F. ; Sousa, F.

IEEE Transactions on Aerospace and Electronic Systems Vol. 48, Nº 3, pp. 2746 - 2755, July, 2012.

ISSN (print): 0018-9251
ISSN (online):

Journal Impact Factor: 1,024 (in 2008)

Digital Object Identifier: 10.1109/TAES.2012.6237626

Abstract
This correspondence proposes an improved implementation of
the subspace projection method aiming to minimize the near-far
effect that occurs in Global Navigation Satellite System (GNSS)
receivers. Our technique does not demand phase estimation of the strong signals, thus being also suitable for frequency-locked loop and noncoherent receivers. The only requirement to acquire weak signals is to use large integration intervals which entails accurate Doppler frequency estimation of the strong signals.