Mitigation of WiFi Interference in Velocity Estimation for Staggered-PRT Weather Radar

Abstract

In this paper we analyse the effect of interference from WiFi network transmissions on the Doppler velocity estimates of C-band weather radars using the Staggered Pulse Repetition Time (SPRT) mode, and we propose a method to mitigate this effect. Starting from a simplified signal model, we obtain closed form expressions of how interference affects two of the simplest and most widely used estimation methods, from which we derive our proposal. Through numerical simulations we analyze the performance of the different methods when using this simplified model and a more realistic and accepted signal model for the meteorological target. The proposed method achieves performance improvement for low Signal-to-Noise Ratios (SNR), both in conditions without interference and with moderate interference.