OTA测量系统的不确定度分析与研究

发布时间：2018-02-27 10:29

本文关键词： OTA 测量不确定度移动台　出处：《天津大学》2015年硕士论文　论文类型：学位论文

【摘要】：随着现在网络环境的日益复杂,良好的辐射性能对移动台的有效工作越来越重要。在射频性能测试中,人们越来越注重移动台的整机性能,这种整机性能直接反映了移动台最终的发射性能和接收性能。移动台空中性能测量(OTA,over the air)就是衡量移动台整机性能的一种有效方法,属于有源测试。其主要包括两部分:总全向辐射功率(TIRP,Total Isotropic Radiated Power)和总全向辐射灵敏度(TIRS,Total Isotropic Radiated Sensitivity)。测量不确定度是判断测量结果质量的重要依据,是确保实验室测量准确性的关键指标。测试系统作为集成化的测量工具,它对测量结果的不确定度会产生不可忽视的影响。根据标准ISO/IEC 17025的要求,对具备测量功能的测试系统,必须进行不确定度的评估。一份完整的检测数据和报告应包括有关不确定度的信息,因此对OTA测量系统的不确定度进行分析与研究,保证了OTA测量的可靠性,提高了实验室检测数据的精度。本文首先介绍了不确定度的基本概念以及一般的评定方法,为后续的研究分析奠定了理论基础。接着对OTA测试的原理、系统组成进行了详细说明。随后,根据前面对测试系统及原理的分析,建立符合本实验室实际测量过程的数学模型,准确、全面地找出影响系统不确定度的各个分量,通过实验统计方法和查阅技术资料等方法,定量计算系统不确定度并给出不确定度报告。最后,本文根据对不确定度报告的分析,就如何减小测量系统不确定度的问题提出有效的建议。本文对天津市无线电监测站的OTA测量系统不确定度的评定满足标准YD/T1484-2011的相关要求,体现了实验室的OTA测量能力。
[Abstract]:With the increasing complexity of the network environment, good radiation performance is becoming more and more important for the effective work of mobile stations. In RF performance testing, people pay more and more attention to the performance of the whole mobile station. The performance of the whole machine directly reflects the final transmitting performance and receiving performance of the mobile station. The aerial performance measurement of the mobile station is an effective method to measure the performance of the mobile station as a whole. It mainly consists of two parts: total total Isotropic Radiated power and total omnidirectional radiation sensitivity. The uncertainty of measurement is an important basis for judging the quality of measurement results. The test system, as an integrated measuring tool, has an important influence on the uncertainty of the measurement results. According to the requirement of standard ISO/IEC 17025, the test system has the function of measuring. Uncertainty must be evaluated. A complete test data and report should include information about uncertainty. Therefore, the uncertainty of OTA measurement system is analyzed and studied to ensure the reliability of OTA measurement. This paper first introduces the basic concept of uncertainty and the general evaluation method, which lays a theoretical foundation for further research and analysis. Then, the principle of OTA testing is introduced. The composition of the system is explained in detail. Then, according to the analysis of the test system and its principle, the mathematical model which accords with the actual measurement process in our laboratory is established, and the components that affect the uncertainty of the system are found out accurately and comprehensively. The uncertainty of the system is calculated quantitatively and the uncertainty report is given through the methods of experimental statistics and consulting technical data. Finally, based on the analysis of the uncertainty report, Some effective suggestions on how to reduce the uncertainty of measurement system are put forward. The evaluation of uncertainty of OTA measurement system in Tianjin radio monitoring station meets the requirements of standard YD/T1484-2011, which reflects the ability of OTA measurement in laboratory.
【学位授予单位】：天津大学
【学位级别】：硕士
【学位授予年份】：2015
【分类号】：TN98

【参考文献】