I guess my first question is you are a EE student and not an amateur
radio operator?????
At any rate
802.11b, depending on the data rate, is probably direct sequence
spread spectrum......a good explanation of the differences can be
found in the ARRL Handbook for Radio Communications........almost any
version in the past few years will have it.
Kevin O'Dell N0IRW
On Dec 4, 2007, at 11:45 PM, Peter Klemperer wrote:
Hi,
I'm an electrical engineering student and I'm wondering what the
real technical difference is between the Futaba and Spektrum
systems. Anyone out there that knows the specifics or can point to
a resource?
From what I gather from the threads, the Futaba system uses some
sort of continuous frequency hopping but the JR only hops some of
the time? What would trigger a hop (perhaps a detection of
increased error rates)?
OFF TOPIC: For a project during undergrad we were frustrated with
looking for a ground frequency RC system to satisfy the rules of a
design competition so instead we just dropped a small laptop with
an ad-hoc 802.11b NIC into the vehicle and used that for our radio
control. Would this qualify as an continuously-hopping spread
spectrum 2.4 GHz radio system (of course we only needed 20 meters
of range)?
Cheers,
Peter
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