Measurement-Based Tapped-Delay-Line (TDL) Models for Wireless Channels under High Speed Railway Scenarios at 2.6 GHz

The dramatic development of high speed railway (HSR) has spurred great interest in extensive studies on the fading characteristics of the radio channel in all the relevant scenarios. Approved by the Ministry of Railways of China, single input single output (SISO) measurements were performed at 2.6 GHz with 40 MHz bandwidth along the Harbin-Dalian passenger dedicated railway line. In this paper, we provide some fading parameters including the mean excess delay, root-mean-square (RMS) delay spread, the number of paths and the delay Doppler spectrum under diverse HSR scenarios. Plain, viaduct and hilly terrain scenarios are all involved. Based on the extensive body of measured data, tapped-delay-line (TDL) models are established to characterize the time-varying wireless channel, which can be directly employed in the evaluation and comparison of various HSR transmission projects. All these results and models are expected to provide an insight into the behaviors and performance of wireless cellular communication in HSR scenarios.