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CSI-RS (Channel State Information Reference Signal) is designed for higher-order MIMO in LTE-A. However, it could be problematic for LTE legacy UEs in a LTE-A network deployed higher-order MIMO because LTE UEs cannot distinguish CSI-RS from effectual data. In this paper, the impact of CSI-RS on LTE UEs are firstly evaluated by both link-level and system-level simulations. The evaluation results show...
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