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Re: [Discuss-gnuradio] Re: USRP2 802.11 BBN code on the TX side

From: Doug Geiger
Subject: Re: [Discuss-gnuradio] Re: USRP2 802.11 BBN code on the TX side
Date: Mon, 14 Dec 2009 14:25:53 -0500
User-agent: Thunderbird (Windows/20090812)

George Nychis wrote:
http://cyprus.cmcl.cs.cmu.edu/~gnychis/mfilter/bbn_with_probes.tar.gz <http://cyprus.cmcl.cs.cmu.edu/%7Egnychis/mfilter/bbn_with_probes.tar.gz>

Sorry, make clean it before building... trying to get this out ASAP since I will be AFK for the next 6 hours or so.

Just run bbn_80211b_transmit.py ... default parameters should work. I commented out some code which loops sending the packet several times to help test.

The decodable packet should look like this:
http://cyprus.cmcl.cs.cmu.edu/~gnychis/mfilter/probe_response.pcap <http://cyprus.cmcl.cs.cmu.edu/%7Egnychis/mfilter/probe_response.pcap>

- George
Interesting - I'm able to capture this with my airpcap (just a 30dB attenuator and some coax in-between my USRP2 and the airpcap). Lots of errors (either due to a screwy scrambler function, or something causing a high bit-error rate. For this one test, everything after the Source Address (i.e. starting with the BSSID) is wrong.

Douglas Geiger
Code 5545
U.S. Naval Research Laboratory
Washington, DC 20375
(202) 767-9048

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