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Title and Abstract:

Complexity Analysis of Downlink MU-MIMO in 802.11ac

A major new feature in the IEEE 802.11ac standard amendment is downlink multi-user MIMO.  DL MU-MIMO provides the advantage of increasing aggregate throughput over several clients.  However system complexity increases due to several factors.  DL MU-MIMO requires higher resolution channel state information and more frequently update than single user transmit beamforming.  Extra receive antennas at the client are critical in order to provide interference cancellation capability at the client.  In addition the access point has the added complexity of collecting CSI feedback from multiple clients.

Short biography of the speaker:

Dr. Eldad Perahia is Intel Corporation’s physical layer lead in IEEE 802.11.  He has been actively involved in the 802.11ac task group since its inception.  Eldad is the 802.11ac Coexistence Ad Hoc co-chair.  Eldad was also the 802.11ad (60 GHz) chair, and is currently the 802.11aj vice-chair (mmWave in China).  Prior to that, he was the chair of the 802.11 Very High Throughput Study Group that launched 802.11ac and 802.11ad.  He was also the 802.11n Coexistence Ad Hoc chair.  Eldad is the co-author of “Next Generation Wireless LANs: 802.11n and 802.11ac”, published by Cambridge in 2013.  He has twenty five patents, and numerous papers and patent filings in various areas of wireless including satellite communications, cellular, WLAN, millimeter wave technology, and radar.  Eldad has a Ph.D. from the University of California, Los Angeles in electrical engineering specializing in digital radio.