Subspace array processing for the suppression of FM Jamming in GPS Receivers.

The mitigation of FM interference in GPS receivers is considered. In difference to commonly assumed wideband and narrowband interferers, the FM interferers are wideband, but instantaneously narrowband, and as such, have clear time-frequency (TF) signatures that are distinct from the GPS coarse acquisition (C/A) spread spectrum code. In the proposed technique, the estimate of the FM interference instantaneous frequency (IF) and the interference spatial signature are used to construct the spatio-temporal interference subspace. The IF estimates can be provided using existing effective linear or bilinear TF methods. The undesired signal arrival is suppressed by projecting the input data on the interference orthogonal subspace. With a multisensor receiver, the distinctions in both the spatial and TF signatures of signal arrivals allow effective interference suppressions. The deterministic nature of the signal model is considered and the known underlying structure of the GPS C/A code is utalized. We derive the receiver signal-to-interference-plus-noise ratio (SINR) under exact and perturbed IF values. The effect of IF estimation errors on both pseudo-range measurements and navigation data recovery is analyzed. Simulation results comparing the receiver performances under IF errors in single and multiantenna GPS receivers are provided.

Main Author: Amin, Moeness G.
Other Authors: Zhao, Liang., Lindsey, Alan R.
Format: Villanova Faculty Authorship
Language: English
Published: 2004
Online Access: http://ezproxy.villanova.edu/login?url=https://digital.library.villanova.edu/Item/vudl:173678
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dc_source_str_mv IEEE Transactions on Aerospace and Electronic Systems, vol. 40, no. 1, pp. 80-93, January 2004.
author Amin, Moeness G.
author_facet_str_mv Amin, Moeness G.
Zhao, Liang.
Lindsey, Alan R.
author_or_contributor_facet_str_mv Amin, Moeness G.
Zhao, Liang.
Lindsey, Alan R.
author_s Amin, Moeness G.
spellingShingle Amin, Moeness G.
Subspace array processing for the suppression of FM Jamming in GPS Receivers.
author-letter Amin, Moeness G.
author_sort_str Amin, Moeness G.
author2 Zhao, Liang.
Lindsey, Alan R.
author2Str Zhao, Liang.
Lindsey, Alan R.
dc_title_str Subspace array processing for the suppression of FM Jamming in GPS Receivers.
title Subspace array processing for the suppression of FM Jamming in GPS Receivers.
title_short Subspace array processing for the suppression of FM Jamming in GPS Receivers.
title_full Subspace array processing for the suppression of FM Jamming in GPS Receivers.
title_fullStr Subspace array processing for the suppression of FM Jamming in GPS Receivers.
title_full_unstemmed Subspace array processing for the suppression of FM Jamming in GPS Receivers.
collection_title_sort_str subspace array processing for the suppression of fm jamming in gps receivers.
title_sort subspace array processing for the suppression of fm jamming in gps receivers.
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description The mitigation of FM interference in GPS receivers is considered. In difference to commonly assumed wideband and narrowband interferers, the FM interferers are wideband, but instantaneously narrowband, and as such, have clear time-frequency (TF) signatures that are distinct from the GPS coarse acquisition (C/A) spread spectrum code. In the proposed technique, the estimate of the FM interference instantaneous frequency (IF) and the interference spatial signature are used to construct the spatio-temporal interference subspace. The IF estimates can be provided using existing effective linear or bilinear TF methods. The undesired signal arrival is suppressed by projecting the input data on the interference orthogonal subspace. With a multisensor receiver, the distinctions in both the spatial and TF signatures of signal arrivals allow effective interference suppressions. The deterministic nature of the signal model is considered and the known underlying structure of the GPS C/A code is utalized. We derive the receiver signal-to-interference-plus-noise ratio (SINR) under exact and perturbed IF values. The effect of IF estimation errors on both pseudo-range measurements and navigation data recovery is analyzed. Simulation results comparing the receiver performances under IF errors in single and multiantenna GPS receivers are provided.
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dc.title Subspace array processing for the suppression of FM Jamming in GPS Receivers.
dc.creator Amin, Moeness G.
Zhao, Liang.
Lindsey, Alan R.
dc.description The mitigation of FM interference in GPS receivers is considered. In difference to commonly assumed wideband and narrowband interferers, the FM interferers are wideband, but instantaneously narrowband, and as such, have clear time-frequency (TF) signatures that are distinct from the GPS coarse acquisition (C/A) spread spectrum code. In the proposed technique, the estimate of the FM interference instantaneous frequency (IF) and the interference spatial signature are used to construct the spatio-temporal interference subspace. The IF estimates can be provided using existing effective linear or bilinear TF methods. The undesired signal arrival is suppressed by projecting the input data on the interference orthogonal subspace. With a multisensor receiver, the distinctions in both the spatial and TF signatures of signal arrivals allow effective interference suppressions. The deterministic nature of the signal model is considered and the known underlying structure of the GPS C/A code is utalized. We derive the receiver signal-to-interference-plus-noise ratio (SINR) under exact and perturbed IF values. The effect of IF estimation errors on both pseudo-range measurements and navigation data recovery is analyzed. Simulation results comparing the receiver performances under IF errors in single and multiantenna GPS receivers are provided.
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