Abstract:

Adaptive antenna arrays, as effective tools for interference suppression， have been widely used in the global navigation satellite system (GNSS). However, in the processing of interference suppression, the adaptive antenna arrays destroy the integrity of GNSS signals and lead to measure errors for GNSS receivers. The sources of measure errors are derived in theory firstly. Then the effect of adaptive antenna arrays on the code correlation function of the receive is analyzed by simulation. Finally, a measure method of code phase biases is proposed and pseudorange errors are evaluated. Simulation results show that the measure errors induced by adaptive antenna arrays are random values and mainly induced by code phase errors, and the pseudorange errors even reach tens of meters. In precise applications, these errors must be mitigated or compensated.