Re: [Discuss-gnuradio] Re g : benchmark_add_channel.py

[Tom Rondeau]

On Wed, Apr 11, 2012 at 1:18 PM, sumitstop
<address@hidden> wrote:
>
> I was wondering what is this benchmark_add_channel.py for. Is it for adding a
> new channel "on the fly" to an ongoing OFDM transmission  :confused:
>
> using verbose it says the format to run it as
>
> ./benchmark_add_channel.py [options] <input file> <output file>
>
> -----
> Sumit Kr.
> Research Assistant
> Communication Research center
> IIIT Hyderabad
> India


The benchmark_add_channel.py (which are in both the ofdm and
narrowband examples) is designed to let people play with channel
properties in simulation. The benchmark_tx scripts have a --to-file
that saves all of the data into a local file instead of trying to use
a USRP to go over the air. Likewise, the benchmark_rx scripts have a
--from-file to read in the data from a file. The benchmark_add_channel
takes in the file and performs the operations that are specified (AWGN
noise power, frequency offset, timing offset, etc.) and outputs a new
file that can then be read in by the receive scripts.

Tom