In maritime and aeronautical transports, intelligent systems such as AIS 2 AIS – Automatic Identification System. 2 or ADS-B 3 ADB-S – Automatic Dependent System-Broadcast. 3 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, INRETS 4 INRETS – Institut National de Recherche sur les Transports et leur Sécurité. 4 and DOAE 5 DOAE – Department Opto-Acousto-Electronique. 5 , achieved a mock-up of the radar system called CODIBDT 6 CODIBIT – Communication Detection and Identification of Broken-Down Trains. 6 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 2πM, 7 2πM – Cyclic rotation Modulation. 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 2πM coding technique is compared to others techniques called SSS2 8 SSS2 – Sequential Spreading Spectrum technique using 2 codes. 8 and CPM 9 CPM – Code Position Modulation. 9 .