Measurements and Modeling of Cross-Correlation Property of Shadow Fading in High-Speed Railways

With the fast development of high-speed railways, the need for wireless communication to satisfy secure demand of train and application demand of passengers has become evident.As a part of large- scale propagation effects, shadow fading is of great importance to design hand-over algorithm, and to evaluate macro diversity gain in wireless communications. This paper offers an investigation on the cross-correlation property of shadow fading in high-speed railway (HSR) network, based on the empirical data measured along Xingyang to Luoyang HSR line of China. The measurements indicate that the crosscorrelation coefficient of shadow fading is correlated to the separation distance between two base stations. Several models, to describe the relation between the cross-correlation coefficient and the separation distance, are proposed and compared with each other in this paper, and a decaying exponential model is finally suggested to characterize the cross-correlation property in the HSR environments.