Radiated two-stage method for LTE MIMO user equipment performance evaluation
Two-stage method for long-term-evolution (LTE) multiple-input-multiple-output (MIMO) wireless user equipment (UE) performance evaluation is one of the methods proposed for standard organizations. However, the conducted two-stage method has been challenged for its lack of support for 'over-the-air' (OTA) as well as for its negligence of the self-interference in the device under test (DUT) in the throughput test. Self-interference in DUT such as cell phones could significantly reduce receiver sensitivity, thus, if not properly included in the test setup, could affect the test accuracy. In order to solve the problems, a radiated two-stage (RTS) test method for LTE MIMO UE test is presented in this paper. By applying an invert calibration matrix to the input signal of the throughput test, the proposed method performs OTA second-stage test, which eliminates the problems of connecting an RF cable directly to the DUT receiver. The RTS OTA MIMO test method can be executed in a standard single-input-single-output anechoic chamber, reduces overall system cost, and offers high reliability and repeatability. Meanwhile, the measurement provides extensive subcomponent-level performance information and makes it an ideal solution for both research and development (R&D) and certification test.
W. Yu et al., "Radiated two-stage method for LTE MIMO user equipment performance evaluation," IEEE Transactions on Electromagnetic Compatibility, vol. 56, no. 6, pp. 1691-1696, Institute of Electrical and Electronics Engineers (IEEE), Dec 2014.
The definitive version is available at http://dx.doi.org/10.1109/TEMC.2014.2320779
Electrical and Computer Engineering
Center for High Performance Computing Research
Keywords and Phrases
Channel estimation; Codes (symbols); Design for testability; Feedback control; Interference suppression; Long Term Evolution (LTE); Mobile phones; Mobile telecommunication systems; Radio; Signal receivers; Telecommunication repeaters; Tunneling (excavation); Wireless telecommunication systems; Certification tests; Multiple input multiple output; Over the airs; radiated two-stage (RTS) method; Receiver sensitivity; Research and development; Self-interferences; Single-input single-output; MIMO systems
International Standard Serial Number (ISSN)
Article - Journal
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