Title :
Improved MU-MIMO performance for future 802.11 systems using differential feedback
Author :
Porat, R. ; Ojard, E. ; Jindal, Nakul ; Fischer, M. ; Erceg, V.
Abstract :
Multiuser MIMO (MU-MIMO) is a new technology adopted in IEEE 802.11ac for enhancing downlink throughput. 802.11ac has an explicit feedback mechanism that enables very high quality channel feedback to be provided to the transmitter, but the overhead can be quite substantial. We propose a differential feedback method that significantly reduces this overhead by using a simple lossless, variable-length compression technique that exploits the slowly time varying wireless channel.
Keywords :
MIMO communication; feedback; multiuser channels; radio transmitters; telecommunication standards; wireless LAN; wireless channels; 802.11 systems; IEEE 802.11ac; MU-MIMO performance; channel feedback; differential feedback; downlink throughput; multiuser MIMO performance; overhead reduction; simple lossless technique; time varying wireless channel; transmitter; variable-length compression technique; Aging; Antennas; Channel estimation; Correlation; Downlink; Quantization (signal); Throughput;
Conference_Titel :
Information Theory and Applications Workshop (ITA), 2013
Conference_Location :
San Diego, CA
Print_ISBN :
978-1-4673-4648-1
DOI :
10.1109/ITA.2013.6502944
