[orbit-user] how to use noise

[Sanjit Kaul]

What do you mean by their being no variation in the way your program works?
Can you explain your experiment in greater detail? Typically, noise will
lead to a reduction in received RSSI. Depending on the amount of noise
introduced it can lead to packet errors.

-30dBm of noise is a lot of noise. Please let know what nodes were you using
and the configuration of the nodes. Also, attach the output of the wget
commands you are running to set noise.

Sanjit

On Sat, Nov 29, 2008 at 10:51 PM, Abhinav Sharma <abhinav.307 at gmail.com>wrote:

> hi,
>
> we were running few experiments on the grid. In order to do further tests
> we need to generate noise in the underlying channel. can anyone guide us how
> to do it.
> we used following commands at console...
>
> wget http://instrument1.orbit-lab.org:5012/interference/initializewget
> http://instrument1.orbit-lab.org:5012/interference/awgn?bandwidth=20
> wget
> http://instrument1.orbit-lab.org:5012/interference/set?power=-30&channel=56<http://instrument1.orbit-lab.org:5012/interference/set?power=-30&channel=36>
> wget http://instrument1.orbit-lab.org:5012/interference/start
>
> we changed the channel no. to 56 as we found that the nodes we were using
> run on channel 56.
> but somehow we cudn't find any variation in the working of our program. It
> still gives the same result.
> Is there a way to find whether noise is really being injected?
> we are running experiments on java using gcj. So , havent linked our
> program to the oml database.
>
>
> thanks
>
> abhinav
>
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