802.11 signal propagation simulation
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I got a objective to be done.
The main purpose is to use particular method to process received RSS, receiver locations to estimate location of 802.11 transmitter.
The whole simulation is about creating a map in which there is one marked transmitter location, and some receiver locations.
Firstly i calculated the distance between every receiver and transmitter to calculate received rss.
Here i didn't really know how to convert this 'ideal' rss value into the one which could imitate the rss value collected in real environment( i assumed that the signal propagates through free space) so that i could test efficiency of my method in estimation of transmitter position.
I tried to use awgn to put some noise into the rss values, and then calculate the wanted position - but here everything depends on value of snr i used in awgn function so that i think that's not a good idea.
I'm really not sure how simulate, wifi signal, and don't no whether is necessary to do so.
i'm looking forward to see some advices on my problem.
Answers (1)
Walter Roberson
on 6 Feb 2014
0 votes
Do some error analysis. Suppose one of the timings was off by 1 microsecond while leaving the others alone, then how much change would that cause in the position estimation? Is the effect of error the same for all positions or does the same absolute error in a "closer" node result in relatively worse accuracy? Is it possible for an error in one sensor to be "canceled out" by errors in other sensors, or do errors in sensors always result in worse accuracy ?
If the error in the rss reading at a particular location is AWGN, doesn't that imply that considering RSS values there over multiple readings should give you a more accurate answer?
on 6 Feb 2014
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