On the characterization of MU-MIMO channels

Florian Kaltenberger, Laura Bernadó, Thomas Zemen

Research output: Chapter in Book or Conference ProceedingsConference Proceedings with Oral Presentationpeer-review


In this work we study the divergence of different links in wide-band multi-user multiple-input multiple-output (MUMIMO) channels. The divergence is measured on several levels: (i) spatial separation of the user's correlation matrices, (ii) co-linearity of the MIMO channel matrices, and (iii) correlation of large scale fading. The measurement data has been acquired using Eurecom's MIMO Openair Sounder (EMOS). The EMOS can perform real-time MIMO channel measurements synchronously over multiple users. For this work we have used an outdoor measurement with two transmit antennas and two users with two antennas each. Several measurements with different distances between users were acquired. We find that the structure of the MIMO channel matrices changes significantly with the inter-user distance. This is best captured by the co-linearity measure. The transmit and the full correlation matrix also show some dependence on the inter-user distance whereas the receive correlation matrices are independent of the inter-user distance. The shadowing correlation was found to be very low in all cases. These findings are important for MU-MIMO precoding and scheduling algorithms.
Original languageEnglish
Title of host publicationInternational ITG Workshop on Smart Antennas (WSA),(Berlin, Germany)
Number of pages6
Publication statusPublished - 2009
Event2009 International ITG Workshop on Smart Antennas - Berlin, Germany
Duration: 16 Feb 200918 Feb 2009


Workshop2009 International ITG Workshop on Smart Antennas

Research Field

  • Enabling Digital Technologies


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