Approach to use pseudo-noise sequences in inner calibration system of active phased antenna arrays

Lyalin, Konstantin S.; Prikhodko, Dmitry V.; Kurganov, Vladislav V.

doi:10.1109/eiconrusnw.2016.7448212

Cited by 5 publications

(1 citation statement)

References 8 publications

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“…In this paper, the correlation-based sounding technique is used for parallel wideband array calibration. This technique is commonly used in the traditional channel sounding area, and it has been proposed for array calibration in [16], [17]. In this work, we try to adapt this method for calibrating arrays integrated with radio chains over-the-air in the same fashion as required in [4].…”

Section: Contributionmentioning

confidence: 99%

A Simultaneous Wideband Calibration for Digital Beamforming Arrays at Short Distances [Measurements Corner]

Nielsen

Fan

2021

IEEE Antennas Propag. Mag.

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Massive multiple-input multiple-output (MIMO) is seen as an essential feature for the fifth-generation (5G) communication systems. To ensure the array performance for beamforming or nulling, it is important to conduct array calibration beforehand. Since 5G massive MIMO base stations (BSs) are expected to be highly integrated, i.e. the antenna arrays are directly integrated with the transceiver front ends, there may be no antenna connectors reserved for calibration purpose. In this case, array calibration will be done fully over-the-air (OTA). In this work, we propose a fast and short-distance OTA calibration method for massive MIMO BSs based on digital beamforming structures. Specifically, the correlation-based sounding technique is utilized for simultaneous measurements, and phase deviation due to the spherical wavefront at short distance is corrected with the known propagation geometry. Moreover, a multipath cancellation scheme is adopted to improve the calibration accuracy. An experiment is conducted in an open laboratory environment to assess the validity and robustness of the proposed calibration method.

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Section: Contributionmentioning

confidence: 99%