The Design And Implementation Of A Vehicle Communication System Prototype For Wave

The WAVE (Wireless Access for Vehicular Environment, WAVE) protocol is mainly composed of the IEEE1609protocol suite and IEEE802.11p. The IEEE1609protocol suite works above the layer of MAC (Media Access Control), which is responsible for channel access, access control and security. IEEE802.11p is responsible for the specification of the physical layer.Referring to IEEE802.11a, IEEE802.11p takes the OFDM (Orthoganal Frequency Division Multiplexing) as the transmission technology in physical layer and adopts the same frame structure as IEEE802.11a. On the other hand, to adapt to the high-speed mobility of WAVE, IEEE802.11p cuts the signal bandwidth and transmission rate in half to reduce its coherent bandwidth.At present, the vehicular communication system based on WAVE is at the stage of theoretical research and prototype development. This topic focuses on the research of physical layer protocol in IEEE802.11p and based on the theoretical analysis and simulation, this topic picks out the practical schemes and algorithms which are suitable for hardware implementation for all submodules of physical layer, completes the hardware implementation of the whole physical layer, and then basically completes a vehicle communication system prototype for WAVE.This paper first introduces the fundamental principles related with the prototype design, including the OFDM technology and the physical layer protocol of IEEE802.11p. Then, it focuses on the design and implementation of the prototype based on the physical layer protocol of IEEE802.11p, introduces the system module hierarchical, and also describes the principles, simulation and hardware implementation of all modules and submodules at detail. Again, on the synchronization technology of the receiver’s physical layer, it also studies on some synchronization technologies and algorithms, carries on theoretical analysis and Matlab simulation and proposes an optimization algorithm which achieves good synchronization performance as well as saves hardware resources. At last, it takes a joint test of the physical layer prototype using the video transmission system in business layer, which contains three phases, digital baseband joint test, analog Baseband joint test and radio frequency joint test. Through the joint test, it successfully verifys the validity and practicability of the prototype of the vehicle communication system for WAVE and makes a prospect for the future work.