29 Jun
2013
29 Jun
'13
12:19 a.m.
Based upon
what the bell system guys were doing 50 years ago, it seems that 45Mbps over
a 70-100km radio link appears it ought to be doable.... but really, 10Mbps
over 50km would be a good start.
We don't all have mountaintop microwave sites....
We have homes and ham stations in compromise locations with city lots,
restricted antennas and big RF absorbing trees... 25W of 440 MHz
will probably get through where less power at higher frequencies
won't. The UDR56K is a good compromise real world solution that is
probably the last best hope for AMPR data... The speed is good
enough for IM, email like this list, megabyte files (I know first hand
that's possible...) and facebook clones. That's way more than what
we have now... The price per node (about $600) is high and will be
hard for many to justify but it beats the competitors - ID1 is $1+K
for 120K raw data with 10W at 1.2 G or D710 with 50W of 9k6 data UHF
or VHF for $700.
Let's raise the bar a bit and get to building a
RADIO BASED NETWORK!
A harder problem than the RF is the WHY.... I can download Zombie
videos at 40MB (or ? - I haven't checked lately) from anywhere in the
world - why should I futz around with silly HAM regulations and
bureaucracy to do limited Ampr data... (FWIW I know the answers to
that...)
Eric
AF6EP
73
Bill, WA7NWP