Cargando…
GNSS Space-Time Interference Mitigation and Attitude Determination in the Presence of Interference Signals
The use of Space-Time Processing (STP) in Global Navigation Satellite System (GNSS) applications is gaining significant attention due to its effectiveness for both narrowband and wideband interference suppression. However, the resulting distortion and bias on the cross correlation functions due to s...
Autores principales: | , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
MDPI
2015
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4507627/ https://www.ncbi.nlm.nih.gov/pubmed/26016909 http://dx.doi.org/10.3390/s150612180 |
_version_ | 1782381821946757120 |
---|---|
author | Daneshmand, Saeed Jahromi, Ali Jafarnia Broumandan, Ali Lachapelle, Gérard |
author_facet | Daneshmand, Saeed Jahromi, Ali Jafarnia Broumandan, Ali Lachapelle, Gérard |
author_sort | Daneshmand, Saeed |
collection | PubMed |
description | The use of Space-Time Processing (STP) in Global Navigation Satellite System (GNSS) applications is gaining significant attention due to its effectiveness for both narrowband and wideband interference suppression. However, the resulting distortion and bias on the cross correlation functions due to space-time filtering is a major limitation of this technique. Employing the steering vector of the GNSS signals in the filter structure can significantly reduce the distortion on cross correlation functions and lead to more accurate pseudorange measurements. This paper proposes a two-stage interference mitigation approach in which the first stage estimates an interference-free subspace before the acquisition and tracking phases and projects all received signals into this subspace. The next stage estimates array attitude parameters based on detecting and employing GNSS signals that are less distorted due to the projection process. Attitude parameters enable the receiver to estimate the steering vector of each satellite signal and use it in the novel distortionless STP filter to significantly reduce distortion and maximize Signal-to-Noise Ratio (SNR). GPS signals were collected using a six-element antenna array under open sky conditions to first calibrate the antenna array. Simulated interfering signals were then added to the digitized samples in software to verify the applicability of the proposed receiver structure and assess its performance for several interference scenarios. |
format | Online Article Text |
id | pubmed-4507627 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | MDPI |
record_format | MEDLINE/PubMed |
spelling | pubmed-45076272015-07-22 GNSS Space-Time Interference Mitigation and Attitude Determination in the Presence of Interference Signals Daneshmand, Saeed Jahromi, Ali Jafarnia Broumandan, Ali Lachapelle, Gérard Sensors (Basel) Article The use of Space-Time Processing (STP) in Global Navigation Satellite System (GNSS) applications is gaining significant attention due to its effectiveness for both narrowband and wideband interference suppression. However, the resulting distortion and bias on the cross correlation functions due to space-time filtering is a major limitation of this technique. Employing the steering vector of the GNSS signals in the filter structure can significantly reduce the distortion on cross correlation functions and lead to more accurate pseudorange measurements. This paper proposes a two-stage interference mitigation approach in which the first stage estimates an interference-free subspace before the acquisition and tracking phases and projects all received signals into this subspace. The next stage estimates array attitude parameters based on detecting and employing GNSS signals that are less distorted due to the projection process. Attitude parameters enable the receiver to estimate the steering vector of each satellite signal and use it in the novel distortionless STP filter to significantly reduce distortion and maximize Signal-to-Noise Ratio (SNR). GPS signals were collected using a six-element antenna array under open sky conditions to first calibrate the antenna array. Simulated interfering signals were then added to the digitized samples in software to verify the applicability of the proposed receiver structure and assess its performance for several interference scenarios. MDPI 2015-05-26 /pmc/articles/PMC4507627/ /pubmed/26016909 http://dx.doi.org/10.3390/s150612180 Text en © 2015 by the authors; licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution license (http://creativecommons.org/licenses/by/4.0/). |
spellingShingle | Article Daneshmand, Saeed Jahromi, Ali Jafarnia Broumandan, Ali Lachapelle, Gérard GNSS Space-Time Interference Mitigation and Attitude Determination in the Presence of Interference Signals |
title | GNSS Space-Time Interference Mitigation and Attitude Determination in the Presence of Interference Signals |
title_full | GNSS Space-Time Interference Mitigation and Attitude Determination in the Presence of Interference Signals |
title_fullStr | GNSS Space-Time Interference Mitigation and Attitude Determination in the Presence of Interference Signals |
title_full_unstemmed | GNSS Space-Time Interference Mitigation and Attitude Determination in the Presence of Interference Signals |
title_short | GNSS Space-Time Interference Mitigation and Attitude Determination in the Presence of Interference Signals |
title_sort | gnss space-time interference mitigation and attitude determination in the presence of interference signals |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4507627/ https://www.ncbi.nlm.nih.gov/pubmed/26016909 http://dx.doi.org/10.3390/s150612180 |
work_keys_str_mv | AT daneshmandsaeed gnssspacetimeinterferencemitigationandattitudedeterminationinthepresenceofinterferencesignals AT jahromialijafarnia gnssspacetimeinterferencemitigationandattitudedeterminationinthepresenceofinterferencesignals AT broumandanali gnssspacetimeinterferencemitigationandattitudedeterminationinthepresenceofinterferencesignals AT lachapellegerard gnssspacetimeinterferencemitigationandattitudedeterminationinthepresenceofinterferencesignals |