Lunch & Learn: Advanced (Zero MUI) AP Cooperation Precoding for Wi-Fi 8

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AP Cooperation schemes which tackle the cell-edge user problem, are expected to be in the focus of Wi-Fi 8. Among them, Coordinated Beamforming (CoBF) is expected to play a key role, mainly due to the minimal inter-AP synchronization and joint processing it requires. In this talk we will analyze CoBF from the perspective of multi-user interference (MUI) and show that the scheme currently envisioned in Wi-Fi 8 is broken! Specifically, we will show that (in contrast to DL MU-MIMO) when the number of STA Rx antennas is larger than the number of streams, the STA does not have enough DoF to mitigate the MU interference and the scheme collapses. After we identify this problem, we will propose a new feedback concept which completely solves the problem, leads to zero MUI; while keeping the Wi-Fi feedback format and implying lower computational complexity! We will demonstrate the ideas in this talk with a short MATLAB demo.


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  • Date: 30 Nov 2023
  • Time: 12:00 PM to 01:00 PM
  • All times are (UTC-08:00) Pacific Time (US & Canada)
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  • Starts 06 November 2023 10:30 PM
  • Ends 30 November 2023 12:00 PM
  • All times are (UTC-08:00) Pacific Time (US & Canada)
  • No Admission Charge

  Speakers

Doron Ezri Doron Ezri of Tel Aviv University

Topic:

Advanced (Zero MUI) AP Cooperation Precoding for Wi-Fi 8

AP Cooperation schemes which tackle the cell-edge user problem, are expected to be in the focus of Wi-Fi 8. Among them, Coordinated Beamforming (CoBF) is expected to play a key role, mainly due to the minimal inter-AP synchronization and joint processing it requires. In this talk we will analyze CoBF from the perspective of multi-user interference (MUI) and show that the scheme currently envisioned in Wi-Fi 8 is broken! Specifically, we will show that (in contrast to DL MU-MIMO) when the number of STA Rx antennas is larger than the number of streams, the STA does not have enough DoF to mitigate the MU interference and the scheme collapses. After we identify this problem, we will propose a new feedback concept which completely solves the problem, leads to zero MUI; while keeping the Wi-Fi feedback format and implying lower computational complexity! We will demonstrate the ideas in this talk with a short MATLAB demo.

Biography:

Dr. Doron Ezri is CTO Wi-Fi of Huawei’s Data Communication Product Line, were he leads research in the fields of future Wi-Fi technologies (11ax/EHT and beyond), Enterprise and Residential Wi-Fi APs and Wi-Fi Chipsets (advanced PHY and MAC). Before Huawei, Dr. Ezri was CEO and Co-Founder of Greenair Wireless, a start-up company developing advanced baseband and MIMO IP Cores for Wi-Fi and LTE/A technologies. Before Greenair, Doron was CTO at Runcom Technologies a WiMAX leader and home of OFDMA technology, were he led the development of the first OFDMA-MIMO chipset in the world (WiMAX Wave 2 MS). Doron holds a BSc, MSc and PhD in Electrical Engineering from Tel Aviv University and in the last 12 years has been teaching a graduate level OFDM-MIMO course at Tel Aviv University.

Email:

Address:Tel Aviv University, P.O. Box 39040, Tel Aviv 6997801, , Tel Aviv, Israel