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Quantitative evaluation of multipath rejection capabilities of GNSS antennas

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Abstract

Multipath error remains the largest error source in many high precision GPS applications. To counteract this problem, solutions at both software and hardware level have been studied. Software processing by means of measurement redundancy or error predictability can be used in order to mitigate the multipath effects. In general, these techniques work properly only when the length of a reflection path exceeds that of the direct path by more than 10–20 m. Unfortunately, in most cases, reflections are generated in the area near the receiving antenna. For this reason, multipath rejection actuated at the antenna level is one of the most valid means to improve the accuracy of GPS systems. The scope of this work is twofold. First, a review of low-multipath reception requirements will be proposed for comparing different classes of high precision GNSS antennas. Based on this discussion, we introduce a quantitative evaluation of multipath rejection capabilities of a GNSS antenna. The proposed assessment technique is focused on the antenna pattern, but, in contrast to other parameters evaluating the antenna radiation characteristics, it is specifically conceived to capture the effects of multipath signals.

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Correspondence to Luigi Boccia.

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Boccia, L., Amendola, G., Gao, S. et al. Quantitative evaluation of multipath rejection capabilities of GNSS antennas. GPS Solut 18, 199–208 (2014). https://doi.org/10.1007/s10291-013-0321-0

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  • DOI: https://doi.org/10.1007/s10291-013-0321-0

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