Analysis of Multipath and CW Interference Effects on GNSS Receivers with EMLP Discriminator

Bo Qu, Jiaolong Wei, Shuangna Zhang, Liang Bi

Department of Electronic and Information Engineering, Huazhong University of Science and Technology, China.
Space Star Technology Co. Ltd, China.

DOI: 10.4236/cn.2013.53B2016                

Abstract

Multipath and continuous wave (CW) interference may cause severe performance degradation of global navigation satellite system (GNSS) receivers. This paper analyzes the code tracking performance of early-minus-late power (EMLP) discriminator of GNSS receivers in the presence of multipath and CW interference. An analytical expression of the code tracking error is suggested for EMLP discriminator, and it can be used to assess the effect of multipath and CW interference. The derived expression shows that the combined effects include three components: multipath component; CW interference component and the combined component of multipath and CW interference. The effect of these components depends on some factors which can be classified into two categories: the receiving environment and the receiver parameters. Numerical results show how these factors affect the tracking performances. It is shown that the proper receiver parameters can suppress the combined effects of multipath and CW interference.

Keywords

Analysis of Multipath and CW Interference Effects on GNSS Receivers with EMLP Discriminator

Conflicts of Interest

The authors declare no conflicts of interest.

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