Multi-Frequency Air-to-Ground Channel Measurements and Analysis for UAV Communication Systems
| Autor: | Zhangdui Zhong, Cesar Briso-Rodriguez, Francois Quitin, Ke Guan, Zhuangzhuang Cui |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
General Computer Science
Computer science UAV Sciences de l'ingénieur Communications system Technologie des télécommunications [télécommunications] Electronic engineering Wireless Path loss General Materials Science Fading Computer Science::Information Theory Electricité courants faibles business.industry Autocorrelation General Engineering Level crossing characterizations fading behavior Air-to-ground (AG) channel lcsh:Electrical engineering. Electronics. Nuclear engineering measurements Fade business lcsh:TK1-9971 Communication channel |
| Zdroj: | IEEE Access, Vol 8, Pp 110565-110574 (2020) IEEE access, 8 |
| ISSN: | 2169-3536 |
| Popis: | In order to implement unmanned aerial vehicle (UAV)-based wireless communications, a better understanding of wireless channels and the corresponding channel characterizations are critical. In this paper, air-to-ground (AG) channel measurements are carried out at some candidate frequencies, i.e., 1 GHz, 4 GHz, 12 GHz, and 24 GHz. With measurement data, the crucial channel parameters are comprehensively analyzed. Firstly, based on the channel model in the 3rd Generation Partnership Project (3GPP), the essential coefficients for modeling path loss, including path loss exponents (PLEs) and height-dependent factors, are obtained for AG channels. Then, a novel autocorrelation model for shadow fading is proposed. Besides, the small-scale fading is statistically analyzed, where the log-logistic distribution is found as the best fit among popular distributions. Moreover, the second-order statistical characteristics, including the level crossing rate (LCR) and average fade duration (AFD), are extracted to describe in-depth the fading behavior. Overall, the results and findings in this paper are essential for realizing reliable communications in AG wireless systems. |
| Databáze: | OpenAIRE |
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