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In this paper, the radio channel characteristics of tunnel scenarios with different carrier frequencies, different distances between the transmitter (Tx) and receiver (Rx), and cross sections are simulated with a ray\u2010tracing tool. Key parameters such as path loss, Rician K\u2010factor, root mean square (RMS) delay spread, and angular spread are studied. According to the results, higher frequencies introduce larger path loss and the presence of the vehicle body increases the path loss by about 35\u2009dB in the scenario; at the same time it will also cause the fluctuation and instability of the path loss. Besides, the influence of reflections from the side walls is significant on radio propagation. The channel experiences more severe fading in a narrow tunnel compared with others.<\/jats:p>","DOI":"10.1155\/2018\/9284639","type":"journal-article","created":{"date-parts":[[2018,8,1]],"date-time":"2018-08-01T23:44:21Z","timestamp":1533167061000},"update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":6,"title":["Channel Characteristics of Rail Traffic Tunnel Scenarios Based on Ray\u2010Tracing Simulator"],"prefix":"10.1155","volume":"2018","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-3505-8002","authenticated-orcid":false,"given":"Jinmeng","family":"Zhao","sequence":"first","affiliation":[]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8234-6667","authenticated-orcid":false,"given":"Lei","family":"Xiong","sequence":"additional","affiliation":[]},{"given":"Danping","family":"He","sequence":"additional","affiliation":[]},{"given":"Jiadong","family":"Du","sequence":"additional","affiliation":[]}],"member":"311","published-online":{"date-parts":[[2018,8]]},"reference":[{"key":"e_1_2_9_1_2","doi-asserted-by":"publisher","DOI":"10.1109\/COMST.2015.2508442"},{"key":"e_1_2_9_2_2","doi-asserted-by":"publisher","DOI":"10.1109\/MCOM.2015.7295464"},{"key":"e_1_2_9_3_2","doi-asserted-by":"publisher","DOI":"10.1109\/TITS.2017.2658179"},{"key":"e_1_2_9_4_2","doi-asserted-by":"publisher","DOI":"10.1109\/MCOM.2018.1700846"},{"key":"e_1_2_9_5_2","doi-asserted-by":"publisher","DOI":"10.1109\/TAP.2017.2734243"},{"key":"e_1_2_9_6_2","doi-asserted-by":"publisher","DOI":"10.1109\/TAP.2017.2759958"},{"key":"e_1_2_9_7_2","doi-asserted-by":"publisher","DOI":"10.1109\/surv.2013.091213.00175"},{"key":"e_1_2_9_8_2","doi-asserted-by":"publisher","DOI":"10.1007\/s11432-016-9014-3"},{"key":"e_1_2_9_9_2","doi-asserted-by":"publisher","DOI":"10.1109\/TAP.2017.2677398"},{"key":"e_1_2_9_10_2","doi-asserted-by":"publisher","DOI":"10.1109\/TITS.2015.2404851"},{"key":"e_1_2_9_11_2","doi-asserted-by":"crossref","unstructured":"GuanK. ZhongZ. AiB. andBriso-RodriguezC. Statistic modeling for propagation in tunnels based on distributed antenna systems Proceedings of the 2013 IEEE International Symposium on Antennas and Propagation & USNC\/URSI National Radio Science Meeting July 2013 Orlando FL USA 1920\u20131921 https:\/\/doi.org\/10.1109\/APS.2013.6711618.","DOI":"10.1109\/APS.2013.6711618"},{"key":"e_1_2_9_12_2","doi-asserted-by":"publisher","DOI":"10.1109\/tvt.2007.900500"},{"key":"e_1_2_9_13_2","doi-asserted-by":"publisher","DOI":"10.1109\/TAP.2015.2388535"},{"key":"e_1_2_9_14_2","doi-asserted-by":"publisher","DOI":"10.1049\/iet-map.2009.0159"},{"key":"e_1_2_9_15_2","doi-asserted-by":"publisher","DOI":"10.1109\/tvt.2011.2178623"},{"key":"e_1_2_9_16_2","doi-asserted-by":"crossref","unstructured":"GuanK. LinX. HeD. AiB. ZhongZ. ZhaoZ. MiaoD. GuanH. andKurnerT. 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