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Hypothesis Test-based Detection of Wi-Fi Interference on NavIC/IRNSS S-band Signal

Published online by Cambridge University Press:  19 March 2019

Priyanka L. Lineswala Open the ORCID record for Priyanka L. Lineswala [Opens in a new window] ,
Darshna D. Jagiwala  and
Shweta N. Shah
Priyanka L. Lineswala
Affiliation:
(Electronics Engineering Department, SVNIT, Surat, India)
Darshna D. Jagiwala*
Affiliation:
(Electronics Engineering Department, SVNIT, Surat, India)
Shweta N. Shah
Affiliation:
(Electronics Engineering Department, SVNIT, Surat, India)
*
(E-mail: darshna12@gmail.com)
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Abstract

The Navigation with Indian Constellation (NavIC)/Indian Regional Navigation Satellite System (IRNSS) is an emerging satellite navigation system that provides an independent navigation system for positioning and timing services in India and up to 1,500 km from its borderline. The dual frequency NavIC system uses the L5 frequency and S-band for navigation. These navigation signals are extremely weak and susceptible to interference when they are received on Earth's surface. Moreover, the performance of these bands may be degraded by other band or out-of-band communication systems, which can become the major threat to the performance of a NavIC receiver. The main focus of this paper is to detect real-time interference of Wi-Fi signals in the S-band of the NavIC receiver. The results are prepared with respect to the Power Spectral Density (PSD), execution of acquisition stage and the detection of Wi-Fi interference with two sample hypothesis testing methods including the Kolmogorov-Smirnov (KS)-test, the t-test and the Variance (var)-test. A performance analysis of the p-value is used to measure the evidence of interference existence for hypothesis testing, decision hypothesis and probability of detection are evaluated for each hypothesis method. The results show the severity of the Wi-Fi signal as a potential source of interference for future NavIC applications.

Keywords

Navigation with Indian Constellation (NavIC)Radio Frequency Interference (RFI)Two sample hypothesis test
Type
Research Article
Information
The Journal of Navigation , Volume 72 , Issue 4 , July 2019 , pp. 931 - 947
Copyright
Copyright © The Royal Institute of Navigation 2019 

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