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PIER PIER B PIER C PIER M PIER Letters PIER Photonics
2011-10-14
Estimation and Mitigation of GPS Multipath Interference Using Adaptive Filtering
By
Kamatham Yedukondalu,

    Dr. Kamatham Yedukondalu

    Dept. Of ECE

    Bhoj Reddy Engineering College for Women

    India

    Homepage

Achanta Dattatreya Sarma,

    Professor Achanta Dattatreya Sarma

    Department of ECE

    Chaitanya Bharathi Institute of Technology (CBIT)

    India

    Homepage

Satya Srinivas Vemuri

    Dr. Satya Srinivas Vemuri

    Osmania University

    India

    Homepage

Progress In Electromagnetics Research M, Vol. 21, 133-148, 2011
doi:10.2528/PIERM11080811 | Google Scholar

Abstract
Estimation and mitigation of multipath error improves the positional accuracy of GPS. The objective of this paper is to estimate the effect of multipath interference at the receiver antenna based on both code and carrier phase measurements using Code minus Carrier (CMC) technique, and suggest a suitable method to mitigate it for static applications. Different adaptive filters such as Least Mean Squares (LMS) and various Recursive Least Squares (RLS) are considered to mitigate the error. The estimated multipath error for a typical signal is 0.8 m and 2.1 m on L1 and L2 carriers, respectively. The results due to adaptive filtering methods are encouraging and significant reduction of error (cm level) is observed. It is found that, when compared with experimental static dual frequency GPS receiver data, LMS and RLS filters give better error minimization on L1 and L2, respectively.
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Citation
Kamatham Yedukondalu, Achanta Dattatreya Sarma, and Satya Srinivas Vemuri, "Estimation and Mitigation of GPS Multipath Interference Using Adaptive Filtering," Progress In Electromagnetics Research M, Vol. 21, 133-148, 2011.
doi:10.2528/PIERM11080811
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