{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,1]],"date-time":"2026-05-01T11:52:53Z","timestamp":1777636373855,"version":"3.51.4"},"reference-count":37,"publisher":"MDPI AG","issue":"12","license":[{"start":{"date-parts":[[2023,6,6]],"date-time":"2023-06-06T00:00:00Z","timestamp":1686009600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"National Natural Science Foundation of China (NSFC)","award":["62001269"],"award-info":[{"award-number":["62001269"]}]},{"name":"National Natural Science Foundation of China (NSFC)","award":["RCS2022K009"],"award-info":[{"award-number":["RCS2022K009"]}]},{"name":"State Key Laboratory of Rail Traffic Control and Safety","award":["62001269"],"award-info":[{"award-number":["62001269"]}]},{"name":"State Key Laboratory of Rail Traffic Control and Safety","award":["RCS2022K009"],"award-info":[{"award-number":["RCS2022K009"]}]},{"name":"Future Plan Program for Young Scholars of Shandong University","award":["62001269"],"award-info":[{"award-number":["62001269"]}]},{"name":"Future Plan Program for Young Scholars of Shandong University","award":["RCS2022K009"],"award-info":[{"award-number":["RCS2022K009"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>This study involved channel modeling and characteristics analysis of unmanned aerial vehicles (UAVs) according to different operating trajectories. Based on the idea of standardized channel modeling, air-to-ground (AG) channel modeling of a UAV was carried out, taking into consideration that both the receiver (Rx) and the transmitter (Tx) ran along different types of trajectories. In addition, based on Markov chains and a smooth-turn (ST) mobility model, the influences of different operation trajectories on typical channel characteristics\u2014including time-variant power delay profile (PDP), stationary interval, temporal autocorrelation function (ACF), root mean square (RMS) delay spread (DS), and spatial cross-correlation function (CCF)\u2014were studied. The multi-mobility multi-trajectory UAV channel model matched well with actual operation scenarios, and the characteristics of the UAV AG channel could be analyzed more accurately, thus providing a reference for future system design and sensor network deployment of sixth-generation (6G) UAV-assisted emergency communications.<\/jats:p>","DOI":"10.3390\/s23125372","type":"journal-article","created":{"date-parts":[[2023,6,7]],"date-time":"2023-06-07T02:02:15Z","timestamp":1686103335000},"page":"5372","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":7,"title":["Channel Modeling and Characteristics Analysis under Different 3D Dynamic Trajectories for UAV-Assisted Emergency Communications"],"prefix":"10.3390","volume":"23","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0425-0704","authenticated-orcid":false,"given":"Jingfan","family":"Zhang","sequence":"first","affiliation":[{"name":"School of Microelectronics, Shandong University, Jinan 250101, China"}]},{"given":"Yu","family":"Liu","sequence":"additional","affiliation":[{"name":"School of Microelectronics, Shandong University, Jinan 250101, China"}]},{"given":"Jie","family":"Huang","sequence":"additional","affiliation":[{"name":"The National Mobile Communications Research Laboratory, School of Information Science and Engineering, Southeast University, Nanjing 210096, China"},{"name":"The Purple Mountain Laboratories, Nanjing 211111, China"}]},{"given":"Hengtai","family":"Chang","sequence":"additional","affiliation":[{"name":"The National Mobile Communications Research Laboratory, School of Information Science and Engineering, Southeast University, Nanjing 210096, China"},{"name":"The Purple Mountain Laboratories, Nanjing 211111, China"}]},{"ORCID":"https:\/\/orcid.org\/0009-0001-2561-707X","authenticated-orcid":false,"given":"Zhaolei","family":"Zhang","sequence":"additional","affiliation":[{"name":"School of Microelectronics, Shandong University, Jinan 250101, China"}]},{"given":"Jingquan","family":"Li","sequence":"additional","affiliation":[{"name":"School of Microelectronics, Shandong University, Jinan 250101, China"}]}],"member":"1968","published-online":{"date-parts":[[2023,6,6]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"905","DOI":"10.1109\/COMST.2023.3249835","article-title":"On the road to 6G: Visions, requirements, key technologies and Testbeds","volume":"25","author":"Wang","year":"2023","journal-title":"IEEE Commun. Surv. Tutor."},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"1","DOI":"10.1007\/s11432-021-3351-5","article-title":"Vision, application scenarios, and key technology trends for 6G mobile communications","volume":"65","author":"Wang","year":"2022","journal-title":"Sci. China Inf. Sci."},{"key":"ref_3","doi-asserted-by":"crossref","first-page":"3142","DOI":"10.1109\/COMST.2018.2862141","article-title":"A survey of 5G channel measurements and models","volume":"20","author":"Wang","year":"2018","journal-title":"IEEE Commun. Surv. Tutor."},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"2334","DOI":"10.1109\/COMST.2019.2902862","article-title":"A tutorial on UAVs for wireless networks: Applications, challenges, and open problems","volume":"21","author":"Mozaffari","year":"2019","journal-title":"IEEE Commun. Surv. Tutor."},{"key":"ref_5","doi-asserted-by":"crossref","first-page":"9159","DOI":"10.1109\/TVT.2022.3179695","article-title":"Pervasive wireless channel modeling theory and applications to 6G GBSMs for all frequency bands and all scenarios","volume":"71","author":"Wang","year":"2022","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_6","doi-asserted-by":"crossref","first-page":"1304","DOI":"10.1109\/COMST.2022.3171135","article-title":"What will the future of UAV cellular communications be? A flight from 5G to 6G","volume":"24","author":"Geraci","year":"2022","journal-title":"IEEE Commun. Surv. Tutor."},{"key":"ref_7","doi-asserted-by":"crossref","first-page":"2077","DOI":"10.1109\/TVT.2018.2866414","article-title":"Novel 3-D nonstationary mmWave massive MIMO channel models for 5G high-speed train wireless communications","volume":"68","author":"Liu","year":"2018","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_8","doi-asserted-by":"crossref","first-page":"5333","DOI":"10.1109\/TWC.2021.3139384","article-title":"Deep-learning-based spatial\u2013temporal channel prediction for smart high-speed railway communication networks","volume":"21","author":"Zhou","year":"2022","journal-title":"IEEE Trans. Wirel. Commun."},{"key":"ref_9","doi-asserted-by":"crossref","first-page":"291","DOI":"10.1109\/TTHZ.2019.2909975","article-title":"Measurement, simulation, and characterization of train-to-infrastructure inside-station channel at the terahertz band","volume":"9","author":"Guan","year":"2019","journal-title":"IEEE Trans. Terahertz Sci. Technol."},{"key":"ref_10","doi-asserted-by":"crossref","first-page":"4065","DOI":"10.1109\/TVT.2021.3071242","article-title":"Channel characterization and capacity analysis for THz communication enabled smart rail mobility","volume":"70","author":"Guan","year":"2021","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_11","doi-asserted-by":"crossref","first-page":"2992","DOI":"10.1109\/JSAC.2021.3088664","article-title":"A novel non-stationary 6G UAV channel model for maritime communications","volume":"39","author":"Liu","year":"2021","journal-title":"IEEE J. Sel. Areas Commun."},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"117460","DOI":"10.1109\/ACCESS.2019.2929241","article-title":"A survey on 5G millimeter wave communications for UAV-assisted wireless networks","volume":"7","author":"Zhang","year":"2019","journal-title":"IEEE Access"},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"23841","DOI":"10.1109\/JIOT.2022.3188557","article-title":"A UAV-assisted search and localization strategy in non-line-of-sight scenarios","volume":"9","author":"Yuan","year":"2022","journal-title":"IEEE Int. Things J."},{"key":"ref_14","doi-asserted-by":"crossref","first-page":"8004","DOI":"10.1109\/TVT.2022.3174404","article-title":"Map-based channel modeling and generation for U2V mmWave communication","volume":"71","author":"Zhu","year":"2022","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"147","DOI":"10.23919\/JCC.2021.07.012","article-title":"Game theoretical secure wireless communication for UAV-assisted vehicular internet of things","volume":"18","author":"Liu","year":"2021","journal-title":"China Commun."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"2361","DOI":"10.1109\/COMST.2019.2915069","article-title":"A survey of air-to-ground propagation channel modeling for unmanned aerial vehicles","volume":"21","author":"Khawaja","year":"2019","journal-title":"IEEE Commun. Surv. Tutor."},{"key":"ref_17","doi-asserted-by":"crossref","first-page":"113","DOI":"10.1109\/MWC.001.2000378","article-title":"Wireless channel sparsity: Measurement, analysis, and exploitation in estimation","volume":"28","author":"He","year":"2021","journal-title":"IEEE Wirel. Commun."},{"key":"ref_18","doi-asserted-by":"crossref","first-page":"32","DOI":"10.23919\/JCC.2022.11.003","article-title":"AG channel measurements and characteristics analysis in hilly scenarios for 6G UAV communications","volume":"19","author":"Yu","year":"2022","journal-title":"China Commun."},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"26","DOI":"10.1109\/TVT.2016.2530306","article-title":"Air\u2013ground channel characterization for unmanned aircraft systems\u2014Part I: Methods, measurements, and models for over-water settings","volume":"66","author":"Matolak","year":"2016","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"1913","DOI":"10.1109\/TVT.2016.2585504","article-title":"Air\u2013ground channel characterization for unmanned aircraft systems part II: Hilly and mountainous settings","volume":"66","author":"Sun","year":"2016","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"6607","DOI":"10.1109\/TVT.2017.2659651","article-title":"Air\u2013ground channel characterization for unmanned aircraft systems\u2014Part III: The suburban and near-urban environments","volume":"66","author":"Matolak","year":"2017","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"7643","DOI":"10.1109\/TVT.2017.2677884","article-title":"Air-ground channel characterization for unmanned aircraft systems\u2014Part IV: Airframe shadowing","volume":"66","author":"Sun","year":"2017","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_23","doi-asserted-by":"crossref","first-page":"110565","DOI":"10.1109\/ACCESS.2020.2999659","article-title":"Multi-frequency air-to-ground channel measurements and analysis for UAV communication systems","volume":"8","author":"Cui","year":"2020","journal-title":"IEEE Access"},{"key":"ref_24","doi-asserted-by":"crossref","first-page":"561","DOI":"10.1109\/LAWP.2022.3218604","article-title":"Measurements and modeling of large-scale channel characteristics in subway tunnels at 1.8 and 5.8 GHz","volume":"22","author":"Zhang","year":"2023","journal-title":"IEEE Antennas Wirel. Propag. Lett."},{"key":"ref_25","doi-asserted-by":"crossref","unstructured":"Yang, M., Ai, B., He, R., Ma, Z., and Zhong, Z. (2022, January 16\u201320). Vehicle-to-vehicle channel characteristics in intersection environment. Proceedings of the 2022 IEEE International Conference on Communications Workshops (ICC Workshops), Seoul, Republic of Korea.","DOI":"10.1109\/ICCWorkshops53468.2022.9814577"},{"key":"ref_26","doi-asserted-by":"crossref","first-page":"3065","DOI":"10.1109\/TCOMM.2017.2779128","article-title":"A general 3-D non-stationary 5G wireless channel model","volume":"66","author":"Wu","year":"2017","journal-title":"IEEE Trans. Commun."},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"9865","DOI":"10.1109\/JIOT.2020.3018479","article-title":"A novel nonstationary 6G UAV-to-ground wireless channel model with 3-D arbitrary trajectory changes","volume":"8","author":"Chang","year":"2021","journal-title":"IEEE Int. Things J."},{"key":"ref_28","first-page":"64","article-title":"3D geometry-based UAV-MIMO channel modeling and simulation","volume":"15","author":"Jia","year":"2018","journal-title":"China Commun."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"2048","DOI":"10.1109\/TWC.2022.3208635","article-title":"A non-stationary model with time-space consistency for 6G massive MIMO mmWave UAV channels","volume":"22","author":"Bai","year":"2023","journal-title":"IEEE Trans. Wirel. Commun."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"3211","DOI":"10.1109\/TWC.2020.3047973","article-title":"A general 3D non-stationary wireless channel model for 5G and beyond","volume":"20","author":"Bian","year":"2021","journal-title":"IEEE Trans. Wirel. Commun."},{"key":"ref_31","doi-asserted-by":"crossref","unstructured":"Bian, J., Wang, C.X., Zhang, M., Ge, X., and Gao, X. (2017, January 21\u201325). A 3-D non-stationary wideband MIMO channel model allowing for velocity variations of the mobile station. Proceedings of the 2017 IEEE International Conference on Communications (ICC), Paris, France.","DOI":"10.1109\/ICC.2017.7996406"},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"115990","DOI":"10.1109\/ACCESS.2021.3105296","article-title":"A trajectory-driven 3D non-stationary mm-wave MIMO channel model for a single moving point scatterer","volume":"9","author":"Avazov","year":"2021","journal-title":"IEEE Access"},{"key":"ref_33","doi-asserted-by":"crossref","first-page":"7232","DOI":"10.1109\/TCOMM.2020.3011716","article-title":"A novel 3D UAV channel model for A2G communication environments using AoD and AoA estimation algorithms","volume":"68","author":"Jiang","year":"2020","journal-title":"IEEE Trans. Commun."},{"key":"ref_34","doi-asserted-by":"crossref","unstructured":"Serfozo, R. (2009). Basics of Applied Stochastic Processes, Springer Science & Business Media. [1st ed.].","DOI":"10.1007\/978-3-540-89332-5"},{"key":"ref_35","doi-asserted-by":"crossref","first-page":"3359","DOI":"10.1109\/TVT.2013.2251686","article-title":"A smooth-turn mobility model for airborne networks","volume":"62","author":"Wan","year":"2013","journal-title":"IEEE Trans. Veh. Technol."},{"key":"ref_36","unstructured":"ResearchGate (2023, May 01). WINNER II Channel Models. Available online: https:\/\/www.researchgate.net\/publication\/234055761_WINNER_II_channel_models."},{"key":"ref_37","unstructured":"3GPP (2017). Study on Channel Model for Frequencies from 0.5 to 100 GHz, 3GPP Mobile Competence Centre. Technical Report (TR) 38.901, V16.1.0. 3GPP, Technical Report."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/12\/5372\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T19:49:17Z","timestamp":1760125757000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/23\/12\/5372"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2023,6,6]]},"references-count":37,"journal-issue":{"issue":"12","published-online":{"date-parts":[[2023,6]]}},"alternative-id":["s23125372"],"URL":"https:\/\/doi.org\/10.3390\/s23125372","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2023,6,6]]}}}