Analysis and modeling of dsrc service over-reach inside an arched transportation tunnel

The prediction of received power in the adjacent zone of a Dedicated Short Range Communications (DSRC) system operating inside an arched transportation tunnel is discussed. Wideband directional channel sounding was conducted inside the tunnel, and the gain, angleof- arrival and delay of each propagation path were estimated from the measured data. By simulating application antennas according to the DSRC standard, the received power was predicted for 2 road-side unit antenna positions. The dominant scatterers causing the overreach of radiated power to the adjacent zone were identified and attributed to the ground and sidewalk. The effect of these scatterers were modeled using their scattering losses.

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