In this paper, a calibration of fully-switched multiple-input multiple-output (MIMO) channel sounders with internal crosstalk is considered. The objective is to reduce the number of back-to-back (B2B) connections needed to estimate the transmitter (Tx) and receiver (Rx) response matrices that convey the information about linear distortion and internal crosstalk. For the B2B measurements, a signal and system model is developed using only a few pairs of the Tx and Rx ports of the sounder among all pairs of ports. Using the measurement model, a least-square estimation problem is then formulated and converted in the frequency domain into weighted rank-one approximation problems. Some exemplary sets of B2B connections are proposed for which fewer B2B connections are required than before. Given a proposed set of B2B connections, the alternate convex search (ACS) algorithm with a proper initialization is also proposed to solve the weighted rank-one approximation problems. Numerical results show that the ACS algorithm with the proposed initialization achieves a calibration performance only after a couple of iterations comparable to the conventional method that requires the B2B connections of all port pairs.


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    Titel :

    An Efficient Calibration of a Fully-Switched MIMO Channel Sounder with Internal Crosstalk


    Beteiligte:
    Kim, Junseok (Autor:in) / Lee, Eun Ae (Autor:in) / Kim, Chung-Sup (Autor:in) / Chong, Young-Jun (Autor:in) / Cho, Joon Ho (Autor:in)


    Erscheinungsdatum :

    01.05.2020


    Format / Umfang :

    202885 byte





    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Elektronische Ressource


    Sprache :

    Englisch



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