Analysis of Channel Characteristics for Congested Scene in the Tunnel

In this paper, we analyze the channel characteristics of congested scene at 60 GHz in the tunnel, including empty, congested, and none line-of-sight (NLOS) tunnels. The received power and channel capacity are analyzed and compared with a first-order polynomial and an exponential distribution model proposed to describe them, respectively. Then, Doppler shift and Doppler spread in congested tunnels are analyzed. Results show that more crowded tunnels will cause greater fluctuations of azimuth angles and Doppler spread. These results will be useful for future V2V communication.