Channel (broadcasting)

MIMO

Mathematics

Computer science

Optics

Collision

Akaike information criterion

Dispersion (optics)

Nakagami distribution

Engineering

Telecommunications

Fading

Computer security

Statistics

Physics

IEEE Transactions on Vehicular Technology

Vehicle-to-vehicle (V2V)-communication-based collision avoidance systems detect if two vehicles are on a collision course (e.g., in crossroads, intersections, and highway merging), and they are particularly useful in the absence of line of sight (LOS) owing to buildings, roadside infrastructures, and road bending. Relying on radio measurements using a 4 × 30 multiple-input-multiple-output (MIMO) system at 5.3 GHz, this paper presents the results of an empirical study of V2V propagation channels in two suburban crossroad scenarios, where vehicles are either moving in the same direction and separate from each other along different roads or pass each other in opposite directions at the crossing. The quasi-stationarity interval is first characterized using correlation matrix distance (CMD). Small-scale fading follows a Nakagami distribution based on the Akaike information criteria (AIC). Delay and angular dispersions are found to be significantly affected by the type of crossroad and the presence of an LOS. Cross...

Vehicle-to-Vehicle Radio Channel Characterization in Crossroad Scenarios