Rapid Balise Telegram Decoder With Modified LFSR Architecture for Train Protection Systems

Abstract

We propose a novel halise telegram decoding scheme for MID-based high-speed train protection systems. To reduce the amount of position errors by minimizing the decoding latency, the proposed scheme enables the decoder to have opportunities to find a valid telegram during single halise passage by reutilizing the values from previous failures. We also present a modified linear-feedback shift register (LFSR) and parallel connection of LFSR units to complete both error detection and synchronization of telegrams in one cycle. The experimental results show that the proposed scheme achieves approximately 2000 times faster error detection and synchronization than traditional architectures.