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Non-linear precoding for next generation multi-user MIMO wireless LAN systems

Multi-user MIMO has been recently proposed as a required technology for next generation 802.11 WLAN systems. This new system which will be called 802.11ac, will provide at least 1Gbps of multi-station throughput and at least 500Mbps of single station throughput. While linear precoding can be readily used to achieve this with little complexity, we explore the possibility of employing the non-linear scheme called dirty paper coding. Dirty paper coding is of recent interest in MIMO systems due to the possibility of achieving capacity. We show through simulations that dirty paper coding is promising as an alternative precoding scheme for 802.11ac.