OTA Measurement for IoT Wireless Device Performance Evaluation: Challenges and Solutions


The explosion of applications of Internet of Things (IoT) wireless devices urgently requires over-the-air (OTA) performance evaluations. However, the challenges mainly due to the fact that the ubiquitous IoT device applications have made it necessary for OTA measurements to be operated in accurate, fast, and cost-effective ways. This paper proposes a series of solutions for improving the standard OTA measurements to meet the IoT OTA requirements. For single-input single-output (SISO) terminals, three test techniques are introduced for speeding up their total isotropic sensitivity tests and improving the test accuracy. For IoT multi-input multioutput (MIMO) devices, the radiated two-stage (RTS) method is introduced. The detailed theories are described mathematically, including the pattern measurement error elimination and the inverse matrix auto-solving. The advantages of the RTS on MIMO system diagnosis are outlined. Besides, a smart test system was introduced, which is suitable for a general office building. Both SISO and MIMO can be conducted in this chamber, resulting in great cost saving. Thus, with innovations on hardware and methodologies, the OTA evaluations can be accommodated and helpful for the IoT industry.


Electrical and Computer Engineering


This work was supported in part by the Chinese Ministry of Education-China Mobile Research Foundation under Grant MCM 20150101, and in part by the National Natural Science Foundation of China under Grant 61671203.

Keywords and Phrases

Computer hardware; Cost effectiveness; Hardware; Inverse problems; Measurement errors; MIMO systems; Office buildings; Uncertainty analysis; Wireless telecommunication systems; Antenna measurement; Internet of Things (IOT); Measurement uncertainty; MIMO communication; Over the airs; Performance evaluations; Sensitivity; Two-stage; Wireless communications; Internet of things; Over-the-air (OTA); Radiated two-stage (RTS)

International Standard Serial Number (ISSN)

2327-4662; 2372-2541

Document Type

Article - Journal

Document Version


File Type





© 2019 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Feb 2019