In maritime and aeronautical transports, intelligent systems such as AIS2 or ADS-B3 are used for simultaneous location and data exchange. However nowadays, in guided transports domain, no commercial system is able to ensure the both functionalities. In this paper, we present the achievement of an original sensor allowing both localization and data communication inside the same system. They tend to improve reliability, safety and security on rails or facilitate new exploitation modes inside guided transports networks. Our laboratories, INRETS4 and DOAE5, achieved a mock-up of the radar system called CODIBDT6 the sensor is based on the principle of cooperative radar using a transponder inside targets. It uses a numerical correlation receiver and has a broad band of about 100 MHz for high data flow communications. An original coding technique, called 2pM,7 has been defined and implemented, which allows high data flow communication multiplexed with the localization functionality and ensure a multi-users access. This paper focuses on presenting simulations and experimental results, obtained with the realized mock-up in railway environment, in order to evaluate the system performances in terms of data flow, Bit Error Rate, computing time and complexity. The performances of the 2pM coding technique is compared to others techniques called SSS28 and CPM9. (A) Reprinted with permission from Elsevier.
Abstract