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Tsinghua Science and Technology 2018, 23(2): 172-183 https://doi.org/10.26599/TST.2018.9010019
Open Access | Issue | Published: 02 April 2018

Effects of Power Inversion Spatial Only Adaptive Array on GNSS Receiver Measurements

Show Author's Information Hailong Xu,  Xiaowei Cui( ),  Mingquan Lu
Department of Electronic Engineering, Tsinghua University, Beijing 100084, China.
Keywords:
Global Navigation Satellite System (GNSS) receiver, adaptive array, high-precision application, power inversion, measurement bias, array perturbation, diagonal loading, forward-backward averaging
Cite this article:
Xu H, Cui X, Lu M. Effects of Power Inversion Spatial Only Adaptive Array on GNSS Receiver Measurements. Tsinghua Science and Technology, 2018, 23(2): 172-183. https://doi.org/10.26599/TST.2018.9010019
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Abstract Full text About this article

The Spatial Only Processing Power Inversion (SOP-PI) algorithm is frequently used in Global Navigation Satellite System (GNSS) adaptive array receivers for interference mitigation because of its simplicity ofimplementation. This study investigates the effects of SOP-PI on receiver measurements for high-precisionapplications. Mathematical deductions show that if an array with a centro-symmetrical geometry is used, ideally, SOP-PI is naturally bias-free; however, this no longer stands when non-ideal factors, including array perturbations and finite-sample effect, are added. Simulations are performed herein to investigate how exactly the arrayperturbations affect the carrier phase biases, while diagonal loading and forward-backward averaging are proposed to counter the finite-sample effect. In conclusion, whether SOP-PI with a centro-symmetrical array geometry will satisfy the high precision demands mainly depends on the array perturbation degree of the element amplitude and the phase center.


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About this article

Effects of Power Inversion Spatial Only Adaptive Array on GNSS Receiver Measurements

Show Author's information Hailong Xu, Xiaowei Cui( ), Mingquan Lu
Department of Electronic Engineering, Tsinghua University, Beijing 100084, China.

Abstract

The Spatial Only Processing Power Inversion (SOP-PI) algorithm is frequently used in Global Navigation Satellite System (GNSS) adaptive array receivers for interference mitigation because of its simplicity ofimplementation. This study investigates the effects of SOP-PI on receiver measurements for high-precisionapplications. Mathematical deductions show that if an array with a centro-symmetrical geometry is used, ideally, SOP-PI is naturally bias-free; however, this no longer stands when non-ideal factors, including array perturbations and finite-sample effect, are added. Simulations are performed herein to investigate how exactly the arrayperturbations affect the carrier phase biases, while diagonal loading and forward-backward averaging are proposed to counter the finite-sample effect. In conclusion, whether SOP-PI with a centro-symmetrical array geometry will satisfy the high precision demands mainly depends on the array perturbation degree of the element amplitude and the phase center.

Keywords: Global Navigation Satellite System (GNSS) receiver, adaptive array, high-precision application, power inversion, measurement bias, array perturbation, diagonal loading, forward-backward averaging

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Publication history

Received: 17 January 2017
Accepted: 09 April 2017
Published: 02 April 2018
Issue date: April 2018

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© The author(s) 2018

Acknowledgements

This work was supported by the National Natural Science Foundation of China (No. U1333203) and the Civil Aviation Administration of China (No. MHRD20140102).

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