Objective MIMO Measurement
Over-the-air (OTA) measurements are the standardized methods to evaluate radio performance in wireless systems. Handling multiple input and multiple output (MIMO) situations in OTA measurements is critical for the fourth generation (4G) long-term-evolution (LTE) and upcoming fifth generation (5G) wireless systems. In MIMO OTA measurements, different kinds of devices have different maximum power levels and may be tested in different transmit power levels. Since transmit power level can affect device physical temperature that will proportionally increase the noise temperature and change the throughput of the device under test (DUT), the throughput of DUT is related to its transmit power. Lack of considering the thermal effects of the DUT will result in measurement uncertainty in MIMO OTA test. This paper proposes a new MIMO measurement method based on radiated two-stage approach for LTE systems to illustrate the relationship between the transmit power and the measured MIMO throughput. With this new MIMO measurement method, the measured MIMO performance is a function of the transmit power level of the DUT at its thermally stable condition. The proposed method reduces the measurement uncertainty for the MIMO throughput measurement and provides a reference for optimal functional and EMC designs.
J. Li et al., "Objective MIMO Measurement," IEEE Transactions on Electromagnetic Compatibility, vol. 60, no. 5, pp. 1190-1197, Institute of Electrical and Electronics Engineers (IEEE), Oct 2018.
The definitive version is available at https://doi.org/10.1109/TEMC.2018.2804041
Electrical and Computer Engineering
Electromagnetic Compatibility (EMC) Laboratory
Chinese Ministry of Education. Chinese Mobile Research Foundation
National Natural Science Foundation (China)
Keywords and Phrases
5G mobile communication systems; Design for testability; Long Term Evolution (LTE); MIMO systems; Mobile telecommunication systems; Throughput; Wireless telecommunication systems; Antenna temperature; Multiple input and multiple outputs (MIMO); Noise temperature; Total isotropic sensitivities (TIS); Two-stage; Uncertainty analysis; Radiated two-stage (RTS) method
International Standard Serial Number (ISSN)
Article - Journal
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