Marcus,
As in a document the antennas are tri-band 144/430/1200MHz
omni-directional.
Can you please explain in a little more detail, how can I check
(scriptedly) with different frequencies, and find the best frequency,
what will be criteria to determine the better frequency, is that can be
distance only?
If we have open environment then can you provide any good reference.
~Dilip
Date: Thu, 15 Aug 2013 14:44:42 +0200
From: [email protected]
To: [email protected]
Subject: Re: [USRP-users] best transmitter/receiver setup for large
coverage
Find out what antennas are used;
antennas work better for different frequencies.
However, to really find out what works best in your particular
environment, the best (and fastest way) is most propably to
(scriptedly) try out different frequencies.
Best SNR is, of course, achieved when you transmit with maximum
transceiver and maximum receiver gain, note, however, that
especially for the transmitting part, clipping of signal has been
observed. So basically, try different frequencies with a medium
gain, and when you find one or two good frequency ranges, try
different gains.
Greetings,
Marcus
PS: I've taken discuss-gnuradio from the receiver list, as this is
not a discussion that is very related to GNU Radio
Lin,
As I am aware, daughter-board used are
WBX-40 50 MHz - 2.2 GHz Rx/Tx, 40 MHz BW - Ettus Research | Ettus Research, a National Instruments Brand | The leader in Software Defined Radio (SDR).
and site is not updated.
And we can use WBX 50-2200. So If we replaced the daughterboard.
how can I achieve the best SNR with above environment.
~Dilip
Date: Thu, 15 Aug 2013 20:21:16 +0800
Subject: Re: [USRP-users] best transmitter/receiver setup for
large coverage
From: [email protected]
To: [email protected]
CC: [email protected]; [email protected]
Dilip,
So you just use CORNET remotely. Well, I think you
should try different parameters...
They use Custom
developed USRP2 daughterboard based on the Motorola
RFIC4. I didn't find "specifications on the
"custom daughterboard"" in
the FAQ.
Lin
2013/8/15 dilip thapa <[email protected]>
Lin,
actually it is under the building please check here
CORNET.
~Dilip
Date: Thu, 15 Aug 2013 19:49:38 +0800
Subject: Re: [USRP-users] best
transmitter/receiver setup for large coverage
From: [email protected]
To: [email protected]
CC: [email protected];
[email protected]
1 km is a long distance, so the
lower frequency, the less pathloss. Use
maximum tx gain and rx gain.
And the distance may highly depend on
the environment. Is there buildings,
trees, or just a blank space?
Lin
2013/8/15 dilip thapa
[email protected]
Hi,
I am using usrp2 and gnuradio 3.3.0.
I want to use benchmark_tx.py as
transmitter and benchmark_rx.py as
receiver.
so that multiple receiver at
distance of around 1 KM should get
good signal strength.
So could you please let me know the
best options for tx and rx waveform,
so I could get the maximum range of
coverage.
best options means:
transmitter frequency, tx gain, tx
amplitude and rx-gain, if there is
any other then let me know.
I need this to do spectrum sensing
with energy detection.
with Thanks,
Dilip
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