No, it's a very important part. If LTE needs -75 for top 64QAM and 450 needs -67 for top 64QAM, that's an 8 dB difference in favor of the LTE. 8 dB in the Tx power or 8 dB in the receive sensitivity is 8 dB in the link budget. Then there's a few dB here and a few dB there from different systems such as 4x4, HARQ, etc.
That said, that's assuming no interferer. I'd like to see how they compare in an environment with a -80 interferer. As Ken has pointed out a few times, one of 3650's "secret sauce" is that nobody's there yet to make a ton of noise. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com ----- Original Message ----- From: "Josh Reynolds" <j...@spitwspots.com> To: af@afmug.com Sent: Monday, February 23, 2015 5:43:41 AM Subject: Re: [AFMUG] Grail or Gauntlet? ...or Maybe Just "Powerpointware"? Deviates from the point. The question remains -- was something different between the two setups, such as: antennas or power levels? -- Josh Reynolds CIO, SPITwSPOTS www.spitwspots.com On 02/23/2015 02:05 AM, Mike Hammett wrote: But it changes how much signal is needed to be useful. ----- Mike Hammett Intelligent Computing Solutions http://www.ics-il.com ----- Original Message ----- From: "Josh Reynolds" <j...@spitwspots.com> To: af@afmug.com Sent: Monday, February 23, 2015 1:19:51 AM Subject: Re: [AFMUG] Grail or Gauntlet? ...or Maybe Just "Powerpointware"? Sensitivity does not change the power level of the received signal. -- Josh Reynolds CIO, SPITwSPOTS www.spitwspots.com On 02/22/2015 08:42 PM, Patrick Leary wrote: <blockquote> ...also, seriously. You any like it's even possible to compute a link budget without accounting for sensitivity, MIMO scheme etc. Thinking dBm and dBi are the only numbers in the equation has me wondering how experienced you are Adam. You do realize don't you it's impossible to understand link budget without knowing a whole host of things besides the output power and antenna gain? On Feb 22, 2015 10:37 PM, "Adam Moffett" < dmmoff...@gmail.com > wrote: <blockquote> I read that quote before Patrick, and I am forced to wonder if that individual was in the United States and running at the correct (legal) power level. And I wonder if he was comparing the naked 10dbi SM to a 15dbi wimax CPE. You could definitely get 10db more by turning up the tx power all the way and using a bigger antenna, and maybe you can do some electronic magic to make a little more out of the signal you're getting, but there's no magic that makes more db's appear. If both systems started with the legal +40dbm then how does one end up with 10db more at the CPE? I'm a skeptic by nature. <blockquote> Testing back to back between Cambium and Telrad products on the same tower at the same azimuth, we found an average of 10dB better RF levels with Telrad’s equipment." </blockquote> </blockquote> </blockquote>
