Evaluation and Enhancement of the Physical Layer Performance of Vehicular Communication Systems
Buch in deiner Nähe kaufen
Beschreibung
Vehicular communications is a promising technology to reduce the worldwide number of injured and killed people due to road traffic accidents. A core requirement for the successful deployment of those systems is a high reliable and low latency data transmission. However, the time-varying nature of road traffic scenarios and the resulting physical phenomena of radio propagation are challenging for the conceptual design of future applications. For this reason, fundamental studies that characterize the behavior of wireless technologies in vehicular environments need to be conducted to develop appropriate system solutions.
In this thesis, the dedicated standard for wireless vehicular communications is analyzed
and evaluated on its performance. An already available simulation chain is enhanced by several features in order to enable a realistic investigation of the entire communication system. The accurate modeling of the radio channel is of particular importance. Therefore, a deterministic propagation model, which has been developed in previous work, is validated under wideband considerations. Afterwards, the enhanced and verified simulation environment is applied to evaluate the physical layer performance of the communication system. It is shown that the frame error rate as an important performance metric is strongly impaired and a reliable data transmission is only possible to a limited extent. To overcome this constraint, an approach for enhanced channel estimation and equalization is proposed. The novel technique provides performance results that are close to those of an ideal receiver using perfect channel knowledge. Furthermore, receive diversity methods are examined with respect to their potential to improve the distance in which a reliable communication is possible.
Autor*in
Jörg Nuckelt
Themen in »Evaluation and Enhancement of the Physical Layer Performance of Vehicular Communication Systems«
802.11p channel estimation channel modeling performance evaluation physical layer vehicular communication