基于几何统计的无人机信道模型及硬件模拟

doi:10.3969/j.issn.1001-506X.2019.12.28

系统工程与电子技术 ›› 2019, Vol. 41 ›› Issue (12): 2872-2878.doi: 10.3969/j.issn.1001-506X.2019.12.28

基于几何统计的无人机信道模型及硬件模拟

毛开1, 杨志强1, 陆智俊2,3, 朱秋明1, 宋茂忠2

1. 南京航空航天大学电磁频谱空间认知动态系统工业与信息化部重点实验室, 江苏南京 211100; 2. 南京航空航天大学雷达成像与微波光子技术教育部重点实验室, 江苏南京 211100; 3. 中国航天系统工程有限公司, 北京 100070

出版日期:2019-11-25 发布日期:2019-11-26

Geometry-based UAV channel modeling and its hardware emulation

MAO Kai1, YANG Zhiqiang1, LU Zhijun2,3, ZHU Qiuming1, SONG Maozhong2

1. Key Lab of Dynamic Cognitive System of Electromagnetic Spectrum Space, Ministry of Industry andInformation Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 211100, China; 2. Key Laboratory of Radar Imaging and Microwave Photonics, Nanjing University of Aeronautics andAstronautics, Nanjing 211100, China; 3. China Aerospace System Engineering Co. Ltd,Beijing 100070, China

Online:2019-11-25 Published:2019-11-26

摘要/Abstract

摘要：

针对无人机(unmanned aerial vehicle, UAV)通信信号三维空间传播特点,提出了基于多圆柱体的非平稳几何统计模型(geometry-based stochastic channel model, GSCM),该模型通过引入天线位置变换矩阵,可支持UAV〖JP2〗和地面移动端(mobile terminal,MT)任意三维移动轨迹。在此基础上,构建了适合硬件模拟实现的离散化模型,并设计实现了模拟时变信道特性的随机簇生灭算法,以及基于线性调频叠加原理的非平稳衰落模拟方法。硬件实测结果表明,本文信道模拟器输出的衰落幅值分布、时延功率谱和多普勒功率谱等统计特性与理论结果比较吻合,有效复现了信道时变衰落、多径时延、多径功率和多普勒频率随着UAV的位置和速度变化而变化的过程。

关键词: 无人机, 信道模型, 信道模拟, 随机簇, 线性调频

Abstract:

For the three-dimensional (3D) propagation scenarios of unmanned aerial vehicle (UAV) communication, a multi-cylinder geometry-based stochastic channel model (GSCM) for non-stationary UAV channels is proposed in this paper. The model allows 3D arbitrary trajectories of the UAV as well as the mobile terminal (MT) on ground. On this basis, a corresponding discrete channel model suitable for hardware implementation is developed. Moreover, a birth-and-death algorithm of random cluster is designed to simulate the time-varying channel characteristics, and a new method, i.e., the summation of several linear frequency modulation signals, is applied to reproduce the non-stationary channel fading. Hardware measurement results show that the output statistical properties, i.e., fading amplitude distribution, delay power spectrum density (DPSD) and Doppler power spectrum density(DPSD) agree well with the theoretical ones, and they also clearly demonstrate the time evolving of channel parameters, e.g., the fading, path delay, path power and Doppler frequency, with the position and velocity variations of the UAV.

Key words: unmanned aerial vehicle (UAV), channel model, channel emulation, random cluster, linear frequency modulation

毛开, 杨志强, 陆智俊, 朱秋明, 宋茂忠. 基于几何统计的无人机信道模型及硬件模拟[J]. 系统工程与电子技术, 2019, 41(12): 2872-2878.

MAO Kai, YANG Zhiqiang, LU Zhijun, ZHU Qiuming, SONG Maozhong. Geometry-based UAV channel modeling and its hardware emulation[J]. Systems Engineering and Electronics, 2019, 41(12): 2872-2878.

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基于几何统计的无人机信道模型及硬件模拟

Geometry-based UAV channel modeling and its hardware emulation

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