Transmitting higher power preamble

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.

Regards,
Neha.

On Sun, Apr 11, 2010 at 10:27 AM, neha kochar [email protected]lid
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

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.

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