Hybrid precoding using long-term channel statistics for massive MIMO systems
作者： Sungwoo Park , Jeonghun Park , Robert W. Heath , Ali Yazdan
DOI: 10.1109/ICASSP.2017.7952797
关键词:
摘要: Hybrid analog/digital precoding in the downlink of multiuser massive MIMO systems can reduce number RF chains hence reducing total cost and improving power efficiency. Having few chains, however, makes it difficult for a base station to acquire instantaneous channel state information across all antennas. We develop hybrid technique that uses only long-term (slowly changing) statistics computing analog matrix. The proposed precoder is designed maximize signal-to-leakage-plus-noise ratio (SLNR) when combined with baseband precoder. also propose constrained design reduces effect hardware constraint where precoders are realized phase shifters.
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