基于USRP的多天线信道测量教学平台实现研究

USRP Based Multi-antenna Wireless Sounder Teaching Platform

通信原理实验是绝大多数电子信息类专业所开设的对通信原理这一专业课的配套实验课程,其目的是通过教学实验,引导学生验证课程所学的知识,同时启发学生探究工程实践技术。传统的通信原理实验课基于集成实验箱接线的模式,限制了学生的自主创新和进一步探究技术细节。论文以面向本科通信工程、电子信息科学技术专业的本科教学、实验验证为基调,引入软件无线电的思想,以无线信道测量系统的搭建为实践案例,利用通用软件无线电平台USRP,搭建了一套一发六收的信道测量教学平台。基于该平台,论文对室外情景进行了细致的测量,并对其时延扩展和角度扩展进行了分析比较,解释了测量结果的合理性。通过这些测量和分析,最终验证了信道测量教学平台的功能,证实了在通信原理实验课中引入软件无线电思想的合理性、有效性。

Communication Principle Experiment is a supporting experimental course to the vast majority of electronic and information majors.Its purpose is to lead students to verify what they have learned in the classroom and to inspire them to explore engineering technology details through experiments course.The traditional experiment course of communication principle is based on the mode of integrated experiment box,which limits students'independent innovation and further exploration of technical details.Based on the undergraduate teaching and experimental verification of communication engineering and electronic information science,this paper introduces the idea of software radio to the experiment course.This paper chooses to build a wireless channel measurement system as a practical case.Based on the universal software radio platform USRP to build a set of channel measurement teaching platform with one transmitter and six receivers.Based on this platform,the paper measures the outdoor scenarios carefully,and compares their time delay expansion and angle expansion.Through the analysis of the scenarios,the function of the channel measurement teaching platform is finally verified,and the rationality and effectiveness of introducing the software radio idea into the experimental course of communication principle are verified.