非平稳信道衰落FPGA实时模拟方法  

A Real-time FPGA-based Emulation Method for No-stationary Channel Fading

作　　者：李浩 朱秋明 陈应兵[3] 陈小敏[1] 杨志强 LI Hao1, ZHU Qiu-ming1,2, CHEN Ying-bing3, CHEN Xiao-min1, YANG Zhi-qiang1(1. Jiangsu Key Laboratory of Internet of Things and Control Technologies, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsn 210016, China; 2. Heriot-Watt University, School of Engineering ＆ Physical Sciences, Edinburgh, EH14 4AS, U. K, ; 3. The 41st Institute of China Electronics Technology Group Corporation, Qingdao, Shandong 233006, Chin)

机构地区：[1]南京航空航天大学江苏省物联网与控制技术重点实验室,江苏南京211100 [2]英国赫瑞瓦特大学工程与物理科学学院 [3]中国电子科技集团公司第41研究所,山东青岛233006

出　　处：《信号处理》2018年第3期368-375,共8页Journal of Signal Processing

基　　金：国家重大科学仪器设备开发专项(2013YQ200607);江苏省博士后基金资助(1601017C);中央高校基本科研业务费青年科技创新基金(NS2015046;NS2016044);江苏省物联网与控制技术重点实验室基金(NJ20160027)资助

摘　　要：针对由于收发端的高速移动导致信道衰落呈现的非平稳特性,提出了一种基于线性调频信号叠加的非平稳信道衰落产生方法,并对输出信道衰落的幅值分布和平均增益进行了详细分析,据此设计了基于FPGA硬件平台的非平稳信道衰落模拟器,实测结果表明,该模拟器输出信道衰落分布、自相关函数和多普勒功率谱等均与理论结果非常吻合,可应用于针对非平稳散射环境下的下一代无线通信系统性能测试和验证。Due to high-speed movements of the transmitter and receiver, propagation channels have shown non-stationary characteristics. In this paper, based on the sum of linear-frequency-modulation signals （SoLFM） method, a new generation method for non-stationary channel fading is proposed. Meanwhile, theorical expresssious of statistical properties, i. e. , time-variant probability density function （PDF） and the average gain of channel are derived and analyzed. On this basis, the proposed method is implemented on a Xilinx FPGA hardware platform. The time-variant PDF, autocorrelation function （ACF） and Doppler power spectrum （DPSD） of the emulator are also measured. Hardware measurements have shown that the output statistical properties are consistent well with the theoretical ones, which can be used for real-time simulation of non-stationary channel fading in laboratory environment.

关 键 词：非平稳信道模型 线性调频 信道模拟器 多普勒功率谱 

分 类 号：TN98[电子电信—信息与通信工程]