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MEDLL On-Strobe Correlator: A Combined Anti-multipath Technique for GNSS Signal Tracking

Published online by Cambridge University Press:  11 November 2019

Yiwei Wang  and
Zhigang Huang
Yiwei Wang*
Affiliation:
(School of Electronics and Information Engineering, Beihang University, Beijing100191, China)
Zhigang Huang
Affiliation:
(School of Electronics and Information Engineering, Beihang University, Beijing100191, China)
*
(E-mail: [email protected])
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Abstract

To reduce the operational complexity of the multipath estimating delay lock loop (MEDLL) and improve its anti-multipath performance for strobe correlators, a combination anti-multipath scheme, namely, the MEDLL on-strobe correlation technique, is proposed for global navigation satellite system (GNSS) signal processing. Short-delay multipath rays are separated from the strobe correlation function by the MEDLL mechanism; the dot product between the estimation residue and the standard correlation function or the BOC-PRN correlation function is then computed to eliminate the potential tracking ambiguity. Finally, this non-coherent combination result is sent to the loop filter to obtain anti-multipath code tracking. The proposed method is analysed via simulator data with a software receiver under different front-end bandwidth conditions. The results corroborate the better multipath mitigation capability and lower computational burden, although it is still difficult to eliminate all multipath interference, especially when the front-end bandwidth is insufficient.

Keywords

GNSSMEDLLStrobe CorrelatorAnti-multipath
Type
Research Article
Information
The Journal of Navigation , Volume 73 , Issue 3 , May 2020 , pp. 658 - 677
Copyright
Copyright © The Royal Institute of Navigation 2019

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