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From: | Achilleas Anastasopoulos |
Subject: | Re: [Discuss-gnuradio] gr-cdma is ready |
Date: | Wed, 12 Mar 2014 12:30:56 -0400 |
Hi Achillaes,can you tell me where the documentation of all the blocks used in cdma_tx and cdma_rx are? I tried the cdma_trrx.grc and i got a menu list with options to change freq and timing offset and eb/N0. But i wasn't able to transmit and recieve packets or know how changing parameters in the menu is changing the output. I would like to look into the documentation of inidvidual blocks to understand better.On Fri, Mar 7, 2014 at 3:44 AM, Achilleas Anastasopoulos <address@hidden> wrote:
_______________________________________________Dear all,the OOT module gr-cdma that we have been working on with Zhe Feng is now ready (also fully documented). You can find it here:
An important acknowledgement:this project grew out of the DARPA SPECTRUM CHALLENGE:our team eventually dropped out of the race because of other time commitments but I and Zhe decided to finish up the design and make it publicly available since DARPA was generous enough to send us USRPs for testing etc.
I am looking forward to feedback from the community and to ideas for expanding/improving the design.=======================================
For the impatient:
1) Download gr-cdma from github
> git clone https://github.com/anastas/gr-cdma.git
2) Build the package
> mkdir build_cdma
> cd build_cdma
> cmake -DENABLE_DOXYGEN=ON ../gr-cdma
> make
> sudo make install> sudo ldconfig
3) compile hierarchical blocks and play with built in app
> cd gr-cdma/apps
> gnuradio-companion &
In the gnuradio-companion environment
-- Load the hier block "amp_var_est_hier.grc", "cdma_tx_hier.grc", "chopper_correlator1.grc", "cdma_rx_hier.grc" and compile them
making sure to reload blocks after each compilation
-- Load the application "cdma_txrx.grc" and have fun
Experiment with manual acq/tra, auto acq/tra, changing freq and timing offset, SNR, etc
-- If you have 2 USRPs load the cdma_tx.grc and cdma_rx.grc and enjoy real-time
CDMA transmission. You can also use the cdma_tx.grc and cdma_rx.grc by writting
and reading to a fifo (first do > makefifo /tmp/cdma.fifo)
=====================================best,Achilleas
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--
Regards
Karan Talasila
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