[HamWAN PSDR] FCC Rules

[John Cornelison]

An (expert) friend replies:

“Pulse means radar or one of the pulse modulations: width, position, or amplitude.

 

802.11n modulations are not pulse modulation.

 

The 802.11n OFDM and OFDM DSSS modulations have an emission code of M if I am reading the table correctly. https://www.hfunderground.com/wiki/index.php/Emission_Designator. Part 97.305(8) does not list M as an allowed type of data emission on the 3 cm band.

 

But the Part 97.305 table does list SS as allowed so I think the OFDM DSSS variation of 802.11n would be okay, within tge constraints of 97.311.

 

That's my read on it. The AREDN or HamWAN guys would know more.” - noax

 

*	John/KE7KDQ

 

From: PSDR <psdr-bounces at hamwan.org> On Behalf Of Jonathan Dorminy
Sent: Friday, December 9, 2022 9:25 AM
To: psdr at hamwan.org
Subject: [HamWAN PSDR] FCC Rules

 

I am trying to experiment with making a link on the 10 GHz band, the problem is that I think I am trying to do something prohibited by Part 97. On the 2.4 and 5 GHz bands, pulse emissions are allowed, however, they are prohibited on the 10 GHz band, the band I want to use. My question is, is the OFDM modulation used in 802.11n considered pulse, or spread spectrum by the FCC?

 

I have done extensive searching online and I have found conflicting answers. If you can answer this question, I would greatly appreciate it.

 

73, Jonny Dorminy/KN4LGM

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