Signal Carrier Frequency Variation Approach for GEO Satellite Multipath Mitigation in the BDS

Chengtao XU  Xiaomei TANG  Yangbo HUANG  Feixue WANG  

Publication
IEICE TRANSACTIONS on Communications   Vol.E99-B   No.11   pp.2458-2468
Publication Date: 2016/11/01
Online ISSN: 1745-1345
DOI: 10.1587/transcom.2016EBP3084
Type of Manuscript: PAPER
Category: Navigation, Guidance and Control Systems
Keyword: 
standing-multipath,  GEO satellite multipath,  BDS,  carrier frequency variation,  

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Summary: 
This paper proposes a technique for efficient standing multipath mitigation of geostationary earth orbit (GEO) satellites. The performance of traditional filtering methods for GEO multipath errors can be effectively improved by using carrier frequency variation approach. Conventional multipath mitigation methods do not pay much attention to the GEO satellite multipath effects, and they are less effective due to the non-zero average characteristics of GEO multipath errors for short epochs. By varying carrier frequency, the multipath error average becomes approaching zero in short epochs due to the faster multipath carrier phase variation. Therefore, it could enhance the traditional filtering method performance on the multipath signals. By varying the carrier frequency or the carrier phase offset, the average multipath error will approach zero as a result of the frequent multipath carrier phase variations. This method aims to explore the potential for signal pattern design while improving the performance of current satellite navigation systems. The results show that the root mean square error (RMSE) for pseudo-range multipath errors of the proposed approach improves about 0.3m with a frequency variation range of 15MHz.