As I recall, at 23 cm and 80 Mbps we had an effective bandwidth of around
100 KHz on the "final" design... That design incorporated TDM, limited SS,
and WDM of the signals.

Obviously, with multiple forms of simultaneous multiplexing, the bandwidth
would through the roof, most likely to around 100-150 MHz.

Today, we could use TDM, WDM, SDM, high-end SS, and a few other tricks and,
assuming a target data-rate of 100 Mbps, get the on air bandwidth down to
around 50-75 KHz, maybe even a little less.

With a similar set up except for a target data-rate of 10 Gbps, my
back-of-the-envelope calculations are coming up with an on air bandwidth on
the order of 30-50 MHz.

There may be as much as a 10-15% decrease in bandwidth by using a well
designed DSP.

Essentially we would need to look carefully at the Ethernet 10+ Gbps over
copper and copy those concepts... I have my upper division and grad students
looking at ways to do just that.I am hoping in the next month or so, I can
reach an agreement with EE department and the RF engineering department to
bring in some of their students to help out with those aspects... My
students have already found one thing... BASIC Stamps and PIC processors
will only work up to about 115 Mbps. Beyond that, they are just too slow.

Take Care & 73
--
From The Desk Of
Marty Albert, KC6UFM



"Dana H. Myers" wrote in message
...
What was the on-the-air bandwidth of Frank's 80Mbps signal?

Dana K6JQ