Re: Re: [Discuss-gnuradio] power control when packets transmitting

[Kuo-Chun Huang]

Hi:

I have a question about the transmit amplitude. In the example file 
"transmit_path.py", the amplitude is range from 0 to 32768. But what does these 
number mean? Also, when the other GNUradio nodes receive the packet, how do I 
measure the receive power or the relative receiving amplitude?

Thanks in advanced!

KC

-----Original Message-----

> Date: Fri May 02 13:32:48 EDT 2008
> From: "Matt Ettus" <address@hidden>
> Subject: Re: [Discuss-gnuradio] power control when packets transmitting
> To: "KC Huang" <address@hidden>
>
> KC Huang wrote:
> > Hi:
> >
> > My recent research project focuses on how to implement CogNet on
> > GNUradio platform. As u know, the concept of cognitive radio is that
> > the parameters can be adjusted according to different situations. Such
> > as controlling power, switching freq and modulation when the packets
> > are transmitting. But I am not sure if GNUradio platform can adjust
> > these parameters in the middle of tranmission. I searched previous
> > threads and found that metadata structure can do that because of
> > pipeline transmission. Are there any ways to adjust parameters without
> > using mblock format because I don't think mblock is mature now?
> 
> The easiest and quickest way to adjust power is to control the amplitude
> of the samples you send to the USRP. This can be done in a signal
> processing block and does not need m-blocks.
> 
> Matt