车载自组网的物理层研究

Physical Layer Research of Vehicular Ad Hoc Network

车载自组网能有效提高道路交通安全。物理层作为车载移动自组网的底层,是整个网络的基础,需要满足高速移动时提供实时可靠、有效的接入。基于802.11p国际标准,对采用OFDM技术的车载自组网物理层传输帧格式、通信链路中的时频同步技术、多普勒估计与校正技术、通信信道的估计、均衡技术进行研究设计。仿真结果表明,该物理层能够满足车载自组网对可靠性和有效性的要求。

Vehicular Ad Hoc Network can effectively provide road traffic safety.The physical layer is the basis of the whole network as the bottom of the Vehicular Ad Hoc Network,it provide a reliable and effective real-time access when it needs to meet the high-speed mobile.The physical layer of using OFDM technology based on the 802.11p international standards,including transmission frame formats is studied design,Time and frequency synchronization technology of communication link,Doppler estimation and correction techniques,estimation and equalization techniques of communication channel.The simulation results show that the physical layer to meet the requirements of vehicular Ad Hoc networks on the reliability and validity.