Re: [Discuss-gnuradio] Format of captured data

[Karthik]

On Wed, May 27, 2009 at 1:50 PM, Ujala Qasim <address@hidden> wrote:
> I am receiving 16-bit data from USRP (data is in the range of -32768 to
> 32767) in Windows. Now I want to apply some demodulation algorithms to these
> samples but I am a bit confused.
> According to the following thread, each data sample that is coming from USRP
> is a complex baseband value. However, a complex baseband value should be of
> 32 bit (and not 16-bit) as it comprises of 16-bit I and Q each.
> http://www.ruby-forum.com/topic/182559
>
> So the data samples that I am getting are in the form of I0,Q0,I0,Q0.... or
> a sum: (I + Q)?
> If these are in the form of I0,Q0 ... then how do we keep a track that which
> one is an I and which one is a Q?

If you use usrp_c() source, then the real part of the complex values
are the I values and the imaginary parts are Q values. They are each
16 bits.

Karthik