Maybe an S band radar is the source of the interference/noise? Check out the frequency here http://en.wikipedia.org/wiki/S_band
Typically only larger ships have S band radar (it sees through rain better). Why not put the subs on 5.8ghz? Greg On May 1, 2009, at 7:45 PM, Rogelio wrote: > I've got an interesting interference problem in a marine area, and I > was > hoping to get some feedback on it. > > Every week or so, something evil on 2.4 GHz comes through and > drastically raises the noise floor for about a day (an analysis showed > me like -50 dBm), thus knocking off everyone in the boat dock area who > is using that AP. > > I was thinking about the following type of solution and wanted to get > some feedback: > > --on each dock (9 total), have two dual radios > --mesh them on an available 5.8 GHz channel (this band is not > currently > a problem) > --put in a 2.4 GHz panel antenna on each end (maybe a 19 dBi one that > gives, say, a 30 degree X 30 degree beam coverage). 7 dBm + 19 dBi = > 36 > dBm EIRP for ISM band in U.S. > --have panels on each radio pointing in towards the middle dock area > (boats in the middle would have redundant coverage. Boats on the far > edge would likely only be covered by the distant AP) > --cover each dock with two channels, so if one channel is down, > another > one is an option (or possibly the same channel on a different > polarization) > --possibly use band filters (assuming I know which band is the problem > child) > > Any help would be greatly appreciated. I'm quite new to figuring > out RF > problems like this. > > > -------------------------------------------------------------------------------- > WISPA Wants You! Join today! > http://signup.wispa.org/ > -------------------------------------------------------------------------------- > > WISPA Wireless List: [email protected] > > Subscribe/Unsubscribe: > http://lists.wispa.org/mailman/listinfo/wireless > > Archives: http://lists.wispa.org/pipermail/wireless/ -------------------------------------------------------------------------------- WISPA Wants You! Join today! http://signup.wispa.org/ -------------------------------------------------------------------------------- WISPA Wireless List: [email protected] Subscribe/Unsubscribe: http://lists.wispa.org/mailman/listinfo/wireless Archives: http://lists.wispa.org/pipermail/wireless/
