Performance of GNSS receivers with AGC in noise pulse interference

In order to improve anti-jamming performance of GNSS receivers, the Automatic Gain Control (AGC) system is commonly utilized. AGC is able to scale the analog input voltage to an optimal level of the ADC. Few studies have investigated how AGC impacts the signal processing of GNSS receivers in pulsed interference conditions. This paper studies the performance of GNSS receivers with AGC in the presence of noise pulse interference. Analytical model of post-correlation carrier-to-noise ratio (CNR) and bit error rate (BER) is derived when AGC is present and absent. Finally analytical model is verified by simulation results. The results suggest that the AGC can provide the GNSS receivers with satisfactory performance.