Re: [Discuss-gnuradio] Transmitting higher power preamble

[neha kochar]

Hi Brian,

Thank you for the reply. I apologize but I could not 
very well understand the method you suggested. I have not explored much 
with GNU radio. Could you elaborate more and help me in this regard. I 
appreciate your time and help.

Regards,
Neha.

On Sun, Apr 11, 2010 at 10:12 AM, Brian Padalino <address@hidden> wrote:

On Sun, Apr 11, 2010 at 10:27 AM, neha kochar <address@hidden> wrote:
> Hi all,
>
> Is it possible with GNU Radio to create a transmitter packet that has a
> higher power preamble at the beginning of the packet? This could allow the
> receiver to properly detect incoming packets. The data portion of this
> packet could have reduced transmit power level. I am currently using
> benchmark tx and rx files.

The magnitude of the transmitted complex vector determines the output
power (while in the linear range).  If you set this magnitude to the
value that corresponds to the maximum power output level of the USRP
(just before clipping), you should be able to change it such that the
data portion is scaled to a lower level.

Actually doing this is left as an exercise for the reader.

> Regards,
> Neha.

Good luck!

Brian