Mobility

Interference Sensitivity for Multi-User MIMO in LTE

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Executive Summary

A recent idea of exploiting the promised gains of multi-user MIMO for future cellular standards as LTE by intelligent interference aware receivers instead of suboptimal single-user receivers is quite promising. However this detection strategy is based on the exploitation of the structure of interference which necessitates the knowledge of the constellation and pre-coder of the co-scheduled User Equipment (UE). As the Downlink Control Information (DCI) in LTE is devoid of this information, the authors look in this paper at the sensitivity of LTE's multi-user MIMO mode to the information of co-scheduled UE. They show that exploiting the discrete nature of interference in the absence of the exact knowledge of interference constellation has significant gains as compared to the suboptimal single-user detection.

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