Radiated Two-Stage method for LTE MIMO User Equipment Performance Evaluation

Abstract

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.

Department(s)

Electrical and Computer Engineering

Research Center/Lab(s)

Center for High Performance Computing Research

Second Research Center/Lab

Electromagnetic Compatibility (EMC) Laboratory

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)

0018-9375

Document Type

Article - Journal

Document Version

Citation

File Type

text

Language(s)

English

Rights

© 2014 Institute of Electrical and Electronics Engineers (IEEE), All rights reserved.

Publication Date

01 Dec 2014

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