Mobility

Networked MIMO With Clustered Linear Precoding

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Executive Summary

A clustered Base Transceiver Station (BTS) coordination strategy is proposed for a large cellular MIMO network, which includes full intra-cluster coordination - to enhance the sum rate - and limited inter-cluster coordination - to reduce interference for the cluster edge users. Multi-cell block diagonalization is used to coordinate the transmissions across multiple BTSs in the same cluster. To satisfy per-BTS power constraints, three combined precoder and power allocation algorithms are proposed with different performance and complexity tradeoffs. For intercluster coordination, the coordination area is chosen to balance fairness for edge users and the achievable sum rate.

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