Ber vs Eb/No for ofdm system

I need to find ber vs Eb/No plot for different channels for an OFDM
system. I have created a simple OFDM transceiver system in grc. I
tried error rate block with gui number sink but getting error of
source & sink size matching. I have gone through 1 examples from
gnuradio.org which tells to use vector source with loop to produce ber
plot but didn’t understand much. Someone please go through grc file
which I have attached & tell me what kind of changes I need to get
BER.

---------- Forwarded message ----------
From: Naveen G. [email protected]
Date: Tue, Jan 21, 2014 at 1:30 PM
Subject: ber vs Eb/No for ofdm system
To: discuss-gnuradio [email protected]

I need to find ber vs Eb/No plot for different channels for an OFDM
system. I have created a simple OFDM transceiver system in grc. I
tried error rate block with gui number sink but getting error of
source & sink size matching. I have gone through 1 examples from
gnuradio.org which tells to use vector source with loop to produce ber
plot but didn’t understand much. Someone please go through grc file
which I have attached & tell me what kind of changes I need to get
BER.

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Hi Naveen,

no need to repeat that message just a day later, as long as you don’t
add new information.

However, since I can’t find the example you referring to just now, I’d
guess that since for BER measurement you need to know the input bits,
data is not generated by a random source but by a vector source. A
vector sources just stores a vector of data and outputs it.

The attached flowgraph does neither compare input to output nor does
it count errors, so that’s something you might want to address first.

Then: using the error rate block seems to make sense to me. Please
detail on where you get the item size mismatch (the blocks and the
sizes), most probably it’s easier to help you there, instead of
helping you build a BER measurement system from scratch.

Greetings,
Marcus

On 22.01.2014 07:49, Naveen G. wrote:

gnuradio.org which tells to use vector source with loop to produce
ber plot but didn’t understand much. Someone please go through grc
file which I have attached & tell me what kind of changes I need to
get BER.

_______________________________________________ Discuss-gnuradio
mailing list [email protected]
https://lists.gnu.org/mailman/listinfo/discuss-gnuradio

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