Follow me:

6GHz PSD & AFC with Chuck Lukaszewski

In this episode, we have Chuck Lukaszewski, VP of Wireless Strategy & Standards for HPE, to talk about two technical aspects of 6GHz:

  • Power Spectral Density (PSD)
  • Automated Frequency Coordination (AFC)

On top of explaining these technical concepts, Chuck gives tones of useful information on 6GHz regulations for both the US and Europe.

Podcast Content

6GHz Status

  • Quick recap of the status
  • Draft and Order outcome

Power Spectral Density (PSD

  • Power Spectral Density
    • What is PSD: It tells us how the power is distributed in frequency (dbm/MHz)
    • Why did we decided to change the way we regulate transmission power in 6Ghz (EIRP vs PSD)
      • Be able to use wider channel without lowering the SNR
    • How does it work in practise – The math behind it
    • Europe will not use PSD (23 or 24dBm EIRP for LPI)
      • SNR issue for larger channels
      • Also less channels
      • Allow the portable devices at 14dBm EIRP from the very beginning

Automated Frequency Coordination

  • Automated Frequency Coordination
    • What is AFC:
      • Use of a spectrum database (ULS)
      • Incumbent locations (big dishes)
      • Figure the pattern of that transmitter
      • Where it is in space
      • Frequencies available at this locations
      • AFC Operators will manage the spectrum database
    • Why do we need it for some communications on 6GHz
      • Used for outdoor communications or indoor high power communications
    • Explain how it is different from DFS
      • AFC is a preemptive protocol
      • Every 24h it has to check
    • How does it work?
      • AFC returns the list of available frequencies and the max power to use
      • APs will have GPS inside to report location
      • AP manager needs to know where the APs are
      • Campus AP
        • You are already connected to internet
        • Securely via secured protocols
      • Point-to-Point
        • Initial operations in 5GHz to contact the database
    • AFC equipment will not be available at day 1
      • The process is not defined yet for the incumbents
      • Some more testings have to be done
    • AFC is only enable in 2 UNII bands
      • UNII-5 & UNII-7
    • No outdoor operations on 6GHz in Europe
      • Most European countries do not publish their licence use.
      • No data base in European so no AFC possible in Europe
      • Maybe: Light licensing type of model will be used
    • AFC to comply with international rules for Canada and Mexico
      • Probably follow the FCC after April 23rd

Links & Resources

Join Clear To Send

Come join the Clear To Send community.

Powered by ConvertKit

Wireless Network Engineer and Owner at SemFio Networks. CWNE #180. Living in London ON Canada, born and raised in Dijon, France.

Join the discussion

This site uses Akismet to reduce spam. Learn how your comment data is processed.

More from this show

Episode 218