基于PXI的无线信道测量技术及其传播特性研究

发布时间：2018-05-17 17:49

本文选题：无线信道 + 高频段　；参考：《中国地质大学(北京)》2017年硕士论文

【摘要】：随着物联网等技术的发展,移动终端的数量将大幅度增加。人们对智能手机的广泛使用,也对数据流量的需求越来越大。目前的移动通信技术已经很难满足当下社会对通信服务的要求。2013年由欧洲首先提出的第五代移动通信系统(5G)将大大提高现在通信系统的性能,满足未来人们的需求。无线信道的测量和传播特性对新一代移动通信系统的建立至关重要。但是现在比较成熟的商用信道测试平台不能对6GHz以上高频段的信道进行测试。本文基于LabVIEW软件和PXI总线技术,以频率域的测试方案开发了针对高频段信道的测量平台。根据核心设备PXI模块化矢量网络分析仪M9375的性能,系统可以测量的频率最高达到26.5GHz。与台式网络分析仪相比,M9375矢量网络分析仪具有更宽的动态范围,更低的轨迹噪声。PXI系统的集成程度较高,占用空间更小,只需要一个PXI机箱和相关功能的模块就能完成系统测试、数据采集等工作。本文使用了LabVIEW软件不仅完成了测试流程的编写,同时开发了仪器控制、I/O接口等底层驱动程序。采用虚拟仪器技术进行测试不仅能够提高测试的效率和自动化程度,而且可以减少人为因素产生的误差。测试平台对15GHz频段的室内走廊环境的传播特性进行了测量,测试带宽200MHz。使用Matlab软件对测试的数据进行了处理和分析,获得了信道的功率时延谱、路径损耗指数、阴影损耗、功率角度谱等参数,建立了相关的信道模型。
[Abstract]:With the development of Internet of things and other technologies, the number of mobile terminals will increase greatly. The widespread use of smart phones and the growing demand for data traffic. The current mobile communication technology has been difficult to meet the needs of the present society. The fifth generation mobile communication system (5G), which was first put forward by Europe in 2013, will greatly improve the performance of the present communication system and meet the needs of people in the future. The measurement and propagation characteristics of wireless channels are very important for the establishment of a new generation of mobile communication systems. But the commercial channel testing platform can not test the channel above 6GHz. Based on LabVIEW software and PXI bus technology, a measurement platform for high frequency channel is developed in frequency domain. According to the performance of the core device PXI modular vector network analyzer M9375, the frequency of the system can be measured up to 26.5 GHz. Compared with the desktop network analyzer, the M9375 vector network analyzer has a wider dynamic range, lower trajectory noise. PXI system has a higher degree of integration and less space. Only a PXI chassis and related function modules can complete the system testing, data acquisition and other work. In this paper, the LabVIEW software is used not only to write the test flow, but also to develop the instrument control I / O interface and other underlying drivers. Virtual instrument technology can not only improve the efficiency and automation of the test, but also reduce the error caused by human factors. The propagation characteristics of indoor corridor environment in 15GHz band were measured by the test platform, and the test bandwidth was 200MHz. The Matlab software is used to process and analyze the measured data, and the parameters such as power delay spectrum, path loss index, shadow loss, power angle spectrum and so on are obtained, and the channel model is established.
【学位授予单位】：中国地质大学(北京)
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN92

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