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Measurement and Analysis of Radar-Cross-Section of UAV at 21–26 GHz Frequency Band
AN Hao, LIU Ting, HE Danping, MA Yihua, DOU Jianwu
ZTE Communications    2025, 23 (1): 107-114.   DOI: 10.12142/ZTECOM.202501014
Abstract116)   HTML3)    PDF (1717KB)(85)       Save

With the emergence of the 6G technology, integrated sensing and communication (ISAC) has become a hot-spot vertical application. The low-altitude scenario is considered to be a significant use case of the ISAC. However, the existing channel model is hard to meet the demands of the sensing function. The radar-cross-section (RCS) is a critical feature for the sensing part, while accurate RCS data for the typical frequency band of ISAC are still lacking. Therefore, this paper conducts measurements and analysis of the RCS data of the unmanned aerial vehicles (UAVs) under multiple poses and angles in real flying conditions. The echo from a UAV is acquired in an anechoic chamber, and the RCS values are calculated. The results of different flying attitudes are analyzed, providing RCS features for the ISAC applications.

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Non‑Negligible Influences of Rain on 5G Millimeter Wave Terrestrial Communication System
GONG Shuhong, ZHANG Xingmin, DOU Jianwu, HUANG Weifang
ZTE Communications    2020, 18 (3): 64-70.   DOI: 10.12142/ZTECOM.202003010
Abstract110)   HTML47)    PDF (1826KB)(130)       Save

The impacts of rain on millimeter wave (mmW) terrestrial links, which are inevitably affected by ground-objects-induced multipath propagation, are presented based on the signal time series data measured at 35 GHz. We analyze the coupled influence mechanism of rain-induced and ground-objects-induced multipath propagation on mmW terrestrial links. It can be deduced that the rain-induced impacts on millimeter wave terrestrial links cannot be neglected. The results given in this paper are significant for developing 5G millimeter wave terrestrial mobile communication links.

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Millimeter Wave and THz Propagation Channel Modeling for High-Data Rate Railway Connectivity—Status and Open Challenges
Thomas Kürner, GUAN Ke, Andreas F. Molisch, AI Bo, HE Ruisi, LI Guangkai, TIAN Li, DOU Jianwu,and ZHONG Zhangdui
ZTE Communications    2016, 14 (S1): 7-13.   DOI: DOI:10.3969/j.issn.1673-5188.2016.S1.002
Abstract175)      PDF (1577KB)(179)       Save
In the new era of railways, infrastructure, trains and travelers will be interconnected. In order to realize a seamless high-data rate wireless connectivity, up to dozens of GHz bandwidth is required. This motivates the exploration of the underutilized millimeter wave (mmWave) as well as the largely unexplored THz band. In this paper, we first identify relevant communication scenarios for railway applications. Then the specific challenges and estimates of the bandwidth requirements for high-data rate railway connectivity in these communication scenarios are described. Finally, we outline the major challenges on propagation channel modeling and provide a technical route for further studies.
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