Zhang, Q W; Loh, T H; Zhang, W X; Yang, Y; Qin, F (2019) Proof of concept experiment for single probe MIMO OTA measurement system. In: 2019 13th European Conference on Antennas and Propagation (EUCAP), 31 March 2019 - 5 April 2019, Krakow, Poland.

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Abstract

The novel applications of 5G bring advantages with measurement difficulties. Especially the multi-probe based MIMO OTA measurement will confront difficulties and challenges in the adaptation to 3D spatial channel models. To face this challenge, w proposed a novel single-probe based MIMO OTA measurement architecture to satisfy 3D channel emulation while reduce the cost. In the proposed system, the fading paths have been reallocated in time slices instead the spatial angles to generate partially faded signals, which will be emitted out with a single probe along the corresponding AoA sequences. A time synthesizer will temporally store these time slices, which will be aligned and synthesized to generated aiming 3D spatial fading signals. As the most important challenge in this method is the time alignment, a two-layer time alignment algorithm has been utilized in this work. The first layer roughly aligns the time slices with system triggers. The second layer attaches a Chirp based preamble to the faded signal slice, which will be utilized to generate high accurate synchronization peak for time alignment. The experimental results show the feasibility the two-layer time alignment algorithm, which will further enable the single-probe based MIMO OTA measurement system.

Item Type:	Conference or Workshop Item (Paper)
Keywords:	MIMO OTA measurement, signal synthetization, propagation, time alignment
Subjects:	Electromagnetics > Wireless Communications
Divisions:	Electromagnetic & Electrochemical Technologies
Last Modified:	04 Dec 2019 15:03
URI:	https://eprintspublications.npl.co.uk/id/eprint/8574