Can I point at a single-chip device that can do that? Not off the top of my head, no. 
You'll note that amateur radio operators don't generally have access to silicon foundries, so making this kind of thing is a bit difficult.

However, you are in the right place to ask the question - perhaps the engineers of the Fox-series of sats, or Funcube could comment on their uplink systems. With modulations like BPSK and decent FEC, extremely good performance is definitely possible, but no - we can't make you a single chip to do it. Sorry about that. 

As for the specs you quoted, I'd be seriously testing that out on a bench before you trust what is said in the datasheet. Factors like frequency offset (due to doppler shift, or crystal drift) are also going to come into play here. You'll note that the other users of LoRa on sats are running at very wide bandwidths (125 kHz... for maybe a few hundred bit/s throughput... what an efficient use of spectrum!), so I'd be asking why that is the case. 

73
Mark VK5QI

On Wed, Apr 20, 2022 at 6:29 PM nick <quadpugh@bellsouth.net> wrote:

Good morning/afternoon Mark

 

Good questions. The main reason for choosing LoRa. The main reason for choosing LoRa is its receiver sensitivity which is -148 DBM.  This let us a use a $6 device on a LEO satellite close the link with an omni gain antenna on the ground. This can be done in a 10 KHZ channel. I also believe this can be used in part 97 of the FCC rules.  It might require a rule waver but I believe it is doable.

 

The negative is as you point out is it is proprietary however there are 10 of million of the devices in operation globally.

 

In summary given it sensitivity and low cost it is a good choice.

 

Can you suggest a better choice ?

 

 

 

 

 

 

 

nick

 

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