Eric Johnson (@ej_wireless) header
Eric Johnson (@ej_wireless) profile picture

Eric Johnson

@ej_wireless
Joined February 2015
  • Tweets190
  • Following51
  • Followers348
3Media
Photo by Eric Johnson (@ej_wireless)Photo by Eric Johnson (@ej_wireless)Photo by Eric Johnson (@ej_wireless)
Image from Roger E. Rustad, Jr. (@RogerRustad)
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#deathbynaan
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A picture is worth a thousand words. #novascotiaproud #COVID19NS Social distance 🧑‍🤝‍🧑 Wear a 😷 Wash your 🙌
Image from Sherri Turner 🇨🇦 (@SherriTurner00)
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Yup. Weakest link is the nut on the keyboard
François Vergès (@VergesFrancois) profile pictureFrançois Vergès@VergesFrancois19 Dec 2019
That's so true
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Eric Johnson retweeted
Brent Butt (@BrentButt) profile picture
Brent Butt@BrentButt17 Nov 2019
Ordering breakfast in Saskatchewan this morning... HER: How would you like your eggs? ME: Over easy. HER: White toast, rye, or multi-grain? ME: Multigrain. HER: Hash browns or perogies? ME: ...? HER: Hash browns or perogies? ME: Hang on, I just have to tweet this.
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Wow. Really. Nobody has noticed the nonsense being broadcast about 5G?
Keith R. Parsons (@KeithRParsons) profile pictureKeith R. Parsons
@KeithRParsons18 Sep 2019
Mind boggling Marketing!
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A wall of dry material that is whole multiples of half wavelengths thick in the material will have little to no penetration loss. At odd multiples of a 1/4 wavelength in the material the loss will have peak penetration loss. Have to keep track of the entry and exit reflections
Eric Johnson (@ej_wireless) profile pictureEric Johnson@ej_wireless28 Aug 2019
Material loss is a function of dielectric constant and the thickness in terms of wavelength. The reflection from the front and back surface interact and can even mostly cancel depending on frequency. A concrete block wall, if is cinder blocks has a lot of air space.
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Material loss is a function of dielectric constant and the thickness in terms of wavelength. The reflection from the front and back surface interact and can even mostly cancel depending on frequency. A concrete block wall, if is cinder blocks has a lot of air space.
Ace High WiFi (Foster) (@AceHighWifi) profile pictureAce High WiFi (Foster)
@AceHighWifi23 Aug 2019
Replying to @HonestAdrian @ej_wireless
Hey, that's fair man. I'll go look as soon as I have time. Maybe EJ there will reply
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They have to be GPS connected for timing, private CBRS needs dedicated SIM cards. The most performance you can derive is 2 20MHz (aggregated) channels that at best, is equal to a 2x2 Wi-Fi (20 MHz channels) radio. In real life it will be less to much less due to LTE reuse = 1.
Keith R. Parsons (@KeithRParsons) profile pictureKeith R. Parsons
@KeithRParsons16 Aug 2019
Three Tier Framework for CBRS Spectrum 150MHz shared spectrum 3.55-3.7GHz. Radios must register and be centrally controlled to transmit.
Image from Keith R. Parsons (@KeithRParsons)
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This is "cool!"
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And Detroit is north of Canada
Keith R. Parsons (@KeithRParsons) profile pictureKeith R. Parsons
@KeithRParsons16 Aug 2019
Reno is West of Los Angeles?
Image from Keith R. Parsons (@KeithRParsons)
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just a note. latest draft updates have addressed this
Eric Johnson (@ej_wireless) profile pictureEric Johnson@ej_wireless5 Jun 2018
1) coder mapping is one aspect 2) OFDMA and imperfect power control will factor into practical C/I limit teapawt.net/jsnyder81/status/10034…
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We have a PPSK like solution but OWE (WPA3) will obviate the need for it and dramatically increase security of user traffic
Herr Nilsson (@HerrNilsson2) profile pictureHerr Nilsson@HerrNilsson214 Sep 2018
Would love to hear @ArubaNetworks take on PPSK/IPSK . #MFD3
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Isn't the better question why does Ruckus require 47W? @ArubaNetworks
Herr Nilsson (@HerrNilsson2) profile pictureHerr Nilsson@HerrNilsson214 Sep 2018
The Ruckus 8x8 11ax AP requires 47W to fully work. Do @ArubaNetworks think 8x8 on 30W is possible? #MFD3
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Eric Johnson retweeted
Mark Verbloot (@mverbloot) profile picture
Mark Verbloot@mverbloot11 Aug 2018
It’s great to have outdoor #WiFi here as cellular coverage is patchy so I have been using WiFI Calling which works like a treat.
Image from Mark Verbloot (@mverbloot)
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1) coder mapping is one aspect 2) OFDMA and imperfect power control will factor into practical C/I limit teapawt.net/jsnyder81/status/10034…
Jake Snyder (@jsnyder81) profile pictureJake Snyder@jsnyder813 Jun 2018
Replying to @KeithRParsons
One I thought was interesting… Why isn’t there 1024QAM for the smaller RUs where we could get the most SNR gain?
Image from Jake Snyder (@jsnyder81)
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Nerd central. #atmemea18 teapawt.net/jerrodhoward/status/10…
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#ispywifi teapawt.net/jamie_easley/status/10…
Jamie Easley (@jamie_easley) profile pictureJamie Easley@jamie_easley3 Jun 2018
This @ArubaNetworks AP275 has a pretty good view 🇭🇷 #atm18emea
Image from Jamie Easley (@jamie_easley)
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too bad it is not correct teapawt.net/AceHighWifi/status/994…
Ace High WiFi (Foster) (@AceHighWifi) profile pictureAce High WiFi (Foster)
@AceHighWifi11 May 2018
I haven't seen this put as a pretty graphic yet. Enjoy!
Image from Ace High WiFi (Foster) (@AceHighWifi)
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Why women live longer than men teapawt.net/KeithRParsons/status/9…
Keith R. Parsons (@KeithRParsons) profile pictureKeith R. Parsons
@KeithRParsons16 Apr 2018
#YouHadOneJob
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