超宽带频率非平稳信道硬件实时模拟研究  

On hardware real-time emulation of frequency non-stationary UWB channels

作　　者：冯瑞瑞 毛开 朱秋明[1] 周强军 李奇 陈小敏[1] Feng Ruirui;Mao Kai;Zhu Qiuming;Zhou Qiangjun;Li Qi;Chen Xiaomin(Key Laboratory of Dynamic Cognitive System of Electromagnetic Spectrum Space,Ministry of Industry and Information Technology,Nanjing University of Aeronautics and Astronautics,Nanjing 211100,China)

机构地区：[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,南京211100

出　　处：《电子测量与仪器学报》2022年第11期61-69,共9页Journal of Electronic Measurement and Instrumentation

基　　金：国家重大科研仪器研制项目(61827801);江苏省自然科学基金(BK20211182);未来网络科研基金(FNSRFP-2021-YB-04)项目资助。

摘　　要：利用信道模拟器在实验室复现电波传播环境是超宽带通信设备测试的重要手段。本文针对超宽带信道的频率非平稳特性,提出了一种基于频域平稳区间叠加的超宽带信道模型,并据此设计了基于软件无线电平台的硬件实时模拟系统。该系统使用多路数据并行处理架构实现对高速率数据的实时处理,并引入迭代算法和时分复用结构,既保证信道衰落生成的实时性也降低了硬件资源消耗。实测结果表明,本文模拟器可支持模拟600 MHz的超宽带信道衰落,信道衰落谱型与理论仿真结果吻合,并且输出的信道冲激响应与实测结果基本一致。该系统可为超宽带通信系统的优化、验证和评估提供一种有效的手段。The use of channel simulators to reproduce the radio wave propagation environment in the laboratory is an important means to test ultra-wideband(UWB) communication equipment. Aiming at the frequency nonstationary characteristics of UWB channels, a UWB channel model based on stationary interval superposition in frequency domain is proposed in this paper, and a hardware real-time simulation system based on software radio platform is designed. The system uses a multi-channel data parallel processing architecture to realize real-time processing of high-rate data, and introduces an iterative algorithm and a time division multiplexing structure, which not only ensures real-time generation of channel fading but also reduces hardware resource consumption. The measured results show that the simulator can simulate and output the 600 MHz ultra-wideband signal after superposition non-stationary fading in real time. The measured results show that the simulator can support the simulation of 600 MHz UWB channel fading, the channel fading spectrum is consistent with the theoretical simulation results, and the output channel impulse response is basically consistent with the measured results. The system can provide an effective means for optimization, verification and evaluation of ultra-wideband communication systems.

关 键 词：超宽带信道模型 信道模拟器 并行处理 信道衰落 迭代算法 

分 类 号：TN92[电子电信—通信与信息系统]