How can I transmit and receive bit level data using the benchmark codes of gnuradio?

Hello,

Can I transmit and receive bit level data using the benchmark_tx and rx
codes of the narrowband/OFDM folder? At present, I can transmit and
receive
byte level data using the codes, i.e., I can put 1500 characters (or
1500
bytes) in each packet and receive it. But I want to transmit (i.e. 0 and
1
/ -1 and +1) and receive the demodulated bits (not the bytes or
characters). Can I do it using the benchmark or any other codes of
gnuradio?

Any suggestion will be highly appreciated.

Thanks,

Nazmul


Muhammad Nazmul I.

Graduate Student
Electrical & Computer Engineering
Wireless Information & Networking Laboratory
Rutgers, USA.

I just turn on the log and read the log files in Matlab.
The intermediate signal processing results can be written into files.
Hope it help you.

On Thu, May 24, 2012 at 11:31 AM, Nazmul I.
[email protected]wrote:

Any suggestion will be highly appreciated.
Graduate Student

Alex,
Dreams can come true just believe.

Thanks, Alex.

I tried using the log files in benchmark_rx. But the file has 200
Megabit
size and Matlab could not handle it. Can you limit the size of the
recorded
data?

Besides, can you transmit bit level data using the benchmark_tx code? I
can
transmit ‘1’, ‘2’, ‘a’, etc. but I cannot transmit 1, 0. I assume that
‘1’,
‘2’, etc. are being transmitted as bytes. (I know that the digital_bert
codes allow bit level processing but I wonder how I can transmit 0 and
1
using the benchmark_tx and rx codes, i.e., in a packetized format).

Thanks,

Nazmul

On Thu, May 24, 2012 at 3:58 PM, Alex Z. [email protected]
wrote:

codes of the narrowband/OFDM folder? At present, I can transmit and receive

Alex,
Dreams can come true just believe.


Muhammad Nazmul I.

Graduate Student
Electrical & Computer Engineering
Wireless Information & Networking Laboratory
Rutgers, USA.

I think Matlab can handle this, depending your PC memory …You need to
write some Matlab code to read the file which may contain the complex
samples (gr-complex).

On Thu, May 24, 2012 at 3:18 PM, Nazmul I.
[email protected]wrote:

Thanks, Alex.

I tried using the log files in benchmark_rx. But the file has 200 Megabit
size and Matlab could not handle it. Can you limit the size of the recorded
data?

Maybe you can add some control to start and stop the data recording, in
your python code.

Besides, can you transmit bit level data using the benchmark_tx code? I
can transmit ‘1’, ‘2’, ‘a’, etc. but I cannot transmit 1, 0. I assume that
‘1’, ‘2’, etc. are being transmitted as bytes. (I know that the
digital_bert codes allow bit level processing but I wonder how I can
transmit 0 and 1 using the benchmark_tx and rx codes, i.e., in a packetized
format).

I never tried it yet. Why not just try to compose these bits to bytes
and
then feed to the physical layer? And why do you need to do that?

Hope it help you.

/ -1 and +1) and receive the demodulated bits (not the bytes or

Discuss-gnuradio mailing list

Alex,
Dreams can come true just believe.

I used GRC to transmit +1 and -1. GRC allows you to transmit any integer
or
floating point numbers (scaled between -1 to +1).

The attached GRC file shows a simple flow-graph about this.

Thanks,

Nazmul

On Thu, Oct 25, 2012 at 3:47 AM, sumitstop
[email protected]wrote:

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


Muhammad Nazmul I.

Graduate Student
Electrical & Computer Engineering
Wireless Information & Networking Laboratory
Rutgers, USA.

Do you know how to transmit a known sequence of bit level data? Thx!

Jia

Did you get some solution Nazmul ? I’m curious to know


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