New Packet Radio (NPR) , UHF, 16.5kB/s over 200khz channel, 58kB/s over 1MHz channel

[sonoronos]

I'm sure some folks on here have looked into this already, but since folks on here are interested in different ways of getting faster data rates where traditional infrastrucutre doesn't exist, I thought I'd post it anyways

NPR New Packet Radio

NPR (New Packet Radio) is a custom radio protocol, designed to transport bidirectional IP trafic over 430MHz radio links (ham radio frequencies 420-450MHz). This protocol is optimized for "point to multipoint" topology, with the help of managed-TDMA. Bitrate is 50 to 500kbps (net, effective...

hackaday.io

https://cdn.hackaday.io/files/1640927020512128/NPR_advanced_guide_v2.13b.pdf

 

[DaveInDenver]

The problem here is it is illegal in the U.S. since amateur radio is saddled with the ancient 56kbaud limit on 420-450MHz and implied 19.6kbaud on 6m and 2m. On HF our baud limit is 300.

If people wanted they could support the ARRL in it's petition to the FCC to remove the symbol limit and just regulate on bandwidth.

Or just drop arbitrary regulatory limits completely since amateur radio is supposed to be about experimentation in the first place and this is the sort thing that is relevant in the 21st century so *should* be something we tinker with and if we want to impose an implied OBW on ourselves (which I admit is needed, at least on HF and 2m) then that would be fine.

But just having the FCC state only an occupied bandwidth would be a step forward anyway.

 

[DaveInDenver]

BTW, the ARRL's FCC petition is RM-11708:

https://www.fcc.gov/ecfs/search/fil...11708&q=RM\-11708&sort=date_disseminated,DESC

 

[sonoronos]

yes, thank you for bringing to light this important issue!

 

[F4HDK]

Hello,
I'm Guillaume F4HDK, from France. I'm the inventor-designer of "new packet radio".

NPR70 (New Packet Radio) is legal in the USA : I have developed a specific modulation parameter for USA. Called "modulation 20".
Modulation 20 is 100kHz wide, and 50kBauds.
Of course, you need a valid amateur-radio license.

Some guys in California already use NPR70 with success.

http://www.bay-net.org/uploads/1/2/2/7/122774721/next_gen_packet_radio_ki6zhd.pdf

You can read all the documentation about the project here:

NPR New Packet Radio

NPR (New Packet Radio) is a custom radio protocol, designed to transport bidirectional IP trafic over 430MHz radio links (ham radio frequencies 420-450MHz). This protocol is optimized for "point to multipoint" topology, with the help of managed-TDMA. Bitrate is 50 to 500kbps (net, effective...

hackaday.io

And you can buy modem-transceivers here (for info, I don't earn a single dollar from this sale).

https://elekitsorparts.com/product/npr-70-modem

If you have questions, don't hesitate to ask me.