非平稳信道衰落FPGA实时模拟方法

李浩; 朱秋明; 陈应兵; 陈小敏; 杨志强

doi:10.16798/j.issn.1003-0530.2018.03.014

非平稳信道衰落FPGA实时模拟方法

南京航空航天大学江苏省物联网与控制技术重点实验室

基金项目: 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

详细信息

中图分类号: TN98
计量
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出版历程
- 收稿日期: 2017-06-25
- 修回日期: 2017-11-01
- 发布日期: 2018-03-24

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

Jiangsu Key Laboratory of Internet of Things and Control Technologies, Nanjing University of Aeronautics and Astronautics

摘要

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。硬件实测结果表明，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。
- 非平稳信道模型 /
- 线性调频 /
- 信道模拟器 /
- 多普勒功率谱
Abstract: 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 expresssions 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
- non-stationary channel /
- linear frequency modulation /
- channel emulator /
- Doppler power spectrum

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参考文献(25)

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