Analysis of interference from wireless traffic light controller upon remote keyless entry for vehicles

Abstract

This paper aims to analyze the interference between wireless traffic light controller and remote keyless entry for vehicles. Both systems are located closely to each other at the frequency 433-434 MHz. During the analysis, broadcast variant time delay on wireless traffic light versus distances between and RKE determined to ensure their interference. The interference impact is evaluated in a scenario where the wireless traffic light and RKE for vehicles operate on frequency 434 MHz and 433.9 MHz respectively. Three time delays 0 s, 0.2 s and 0.5 s were considered during the simulations. The results show that time delay 0 s and 0.2 s cause a very high probability of interference. Whereas time delay setting of 0.5 s provide probability of interference about 2 % at distance 5 m.