you are right. Usually it is a very strong signal. But the
specifications talk about 20 dBm tx power. And I receive -13 dBm at a
distance near zero. If I am not mistaken, that is a factor of about
2000(?). So 2000 times less than the ideal value.
(20 dB = factor 100) (-13 dB ~ factor 0.05)
I know I can’t expect 20 dBm because of all the factors you have
mentioned like the distance, even if it is very small. No ideal
antenna on both sides perhaps. But -13 to 20 is a bit much, isn’t it?
I don’t think the micaz is very unprecise. Perhaps a few dBm. Perhaps
it is -8 instead of -13. And perhaps I just get 10 or 15 dBm out of
the URSP2 antenna. Even than there is still a huge factor difference.
So if I didn’t calculate something wrong or have wrong assumptions …
there should be a way to improve it. At least a bit.
It’s not much at all, in fact, expect a lot more. Look at it only in
terms of dB, beccause the fact is, whenever you have a communications
system, you can only couple so much energy to the receiver.
I don’t think the micaz is very unprecise. Perhaps a few dBm.
A few dBm is horrible precision.
Perhaps
it is -8 instead of -13. And perhaps I just get 10 or 15 dBm out of
the URSP2 antenna.
You will always have some loss. The maximum output power from the
AD9862 IC is a maximum value.
Even than there is still a huge factor difference.
That’s not huge.
So if I didn’t calculate something wrong or have wrong assumptions …
there should be a way to improve it. At least a bit.
The only way you’re going to improve this is by using a more efficient
antenna or an antenna with gain, or by putting an amplifier on the USRP
output. Perhaps it is also likely there is some improvement needed with
the jamming signal you are using.
ok, you two convinced me I am not that experienced yet. It just
seemed a bit low to me. If it is a value one can expect, I will continue
to tune the jamming signal.
The results aren’t bad yet. But it is always good to improve efficiency
Have a nice day
Sven Oliver
Am 24.06.2010 15:56, schrieb Jeffrey L.:
This forum is not affiliated to the Ruby language, Ruby on Rails framework, nor any Ruby applications discussed here.
