Modeling of Radio Channels With Leaky Coaxial Cable for LTE M Based CBTC Systems
Due to some disadvantages of wireless local area networks (WLANs) in communication based train control (CBTC) systems, long term evolution for metro (LTE M) has been proposed to be the main communication method for future urban rail transit systems. In this letter, we model the channel of LTE M with leaky coaxial cable for CBTC systems. Specifically, the proposed model is based on real field CBTC channel measurement results. Both path loss and small scale fading are studied. The Akaike information criterion (AIC) is applied to determine the model of small scale fading. We show that lognormal distribution is suitable for small scale fading, and the corresponding parameters of lognormal distribution are also determined from the measurement results.
IEEE Communications Letters