Implementation and testing of a spread spectrum wireless link for data transmission between vehicles

Presents the development and results from field tests carried out on a frequency hopping spread spectrum wireless communication system. This system is for real-time data transmission between moving vehicles and has been developed for the Ohio State University´s Center for Intelligent Transportation Research (CITR) automated cars. A brief overview of automated highway systems (AHS) and the role of wireless communication is presented in the beginning. This is followed by a description of the system requirements for AHS applications and factors leading to the selection of a particular commercial wireless modem. The hardware and software integration of the modem controller are discussed. The results of stationary and mobile tests of the final system, including the effect of frequency diversity with implications for AHS are presented finally