Global Navigation Satellite System (GNSS) receiver, adaptive array, high-precision application, power inversion, measurement bias, array perturbation, diagonal loading, forward-backward averaging
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.
Tsinghua University Press
Hailong Xu, Xiaowei Cui, Mingquan Lu. Effects of Power Inversion Spatial Only Adaptive Array on GNSS Receiver Measurements. Tsinghua Science and Technology 2018, 23(2): 172-183.