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Impact of feedback and user pairing schemes on receiver performance in MU-MIMO LTE systems | IEEE Conference Publication | IEEE Xplore

Impact of feedback and user pairing schemes on receiver performance in MU-MIMO LTE systems


Abstract:

This paper addresses the problem of feedback design for MU-MIMO (multi-user multiple input multiple output) transmission in 3GPP Long Term Evolution (LTE) systems. The CS...Show More

Abstract:

This paper addresses the problem of feedback design for MU-MIMO (multi-user multiple input multiple output) transmission in 3GPP Long Term Evolution (LTE) systems. The CSI (channel state information)-based feedback introduced in the latest release of LTE, Rel-10 is adopted in MU-MIMO transmission and potential performance gains are demonstrated over Rel-8 CQI/PMI (channel quality indicator/precoding matrix indicator)-based feedback mechanism at the link level. The LTE downlink performance has been evaluated for various MU-MIMO feedback schemes and for low complexity receivers. The results have shown that the CSI-based feedback can make a significant tradeoff between receiver performance and complexity in MU-MIMO therewith reducing the design requirements for advanced receiver concepts.
Date of Conference: 01-04 April 2012
Date Added to IEEE Xplore: 11 June 2012
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Conference Location: Paris, France

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