George Nychis wrote:
Hi Doug,
I can guarantee you that the scrambler is not working ;) The 802.11
spec states that at the beginning of every transmission, the scrambler
needs to reset its seed, however the BBN code does not do this.
That's interesting on the clocks. What daughterboard are you using?
- George
I'm using the RFX2400. Looking at the spectrum in a spectrum analyzer
suggests we aren't making the correct spectrum on transmit - not sure if
that's simply because we aren't doing any filtering (i.e. RRC or other
pulse shaping), or if it's something more fundamental.
I think as long as the scrambler isn't set to all ones at the start of
a transmitted frame, we're all good. It's self-synchronizing, so it
doesn't need to be at any known state at the start of a frame.
--
Douglas Geiger
Code 5545
U.S. Naval Research Laboratory
Washington, DC 20375
(202) 767-9048
[email protected]
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