tailieunhanh - Báo cáo hóa học: " 5.9 GHz inter-vehicle communication at intersections: a validated non-line-of-sight pathloss and fading model"

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí hóa hoc quốc tế đề tài : GHz inter-vehicle communication at intersections: a validated non-line-of-sight pathloss and fading model | Mangel et al. EURASIP Journal on Wireless Communications and Networking 2011 2011 182 EURASIP Journal on . http content 20ii i i82 Wireless Communications and Networking a SpringerOpen Journal RESEARCH Open Access GHz inter-vehicle communication at intersections a validated non-line-of-sight pathloss and fading model Thomas Mangel1 Oliver Klemp1 and Hannes Hartenstein2 Abstract Inter-vehicle communication promises to prevent accidents by enabling applications such as cross-traffic assistance. This application requires information from vehicles in non-line-of-sight NLOS areas due to building at intersection corners. The periodic cooperative awareness messages are foreseen to be sent via GHz IEEE . While it is known that existing micro-cell models might not apply well validated propagation models for vehicular GHz NLOS conditions are still missing. In this article we develop a GHz NLOS path-loss and fading model based on real-world measurements at a representative selection of intersections in the city of Munich. We show that a the measurement data can very well be fitted to an analytical model b the model incorporates specific geometric aspects in closed-form as well as normally distributed fading in NLOS conditions and c the model is of low complexity thus could be used in large-scale packet-level simulations. A comparison to existing micro-cell models shows that our model significantly differs. 1 Introduction Vehicular communication is envisioned to increase range and coverage of location and behavior awareness of vehicles thus enabling highly developed pro-active safety systems. The idea is that all vehicles communicate information like position speed and heading periodically to other vehicles in cooperative awareness messages to enable the derivation of an environment picture used as basis for movement prediction. An ad hoc communication technology working on 10 MHz wide frequency bands centered around GHz in .