Re: [Discuss-gnuradio] Question regarding vector_sink_c

[Wee Shinhan]

Hi eric, 

Thanks for the reply, i have connected it to the
channel filters, i trying to do an estimate on
wireless channel coefficient. Therefore i'm trying to
capture the complex data received before
de-modulation. I havent have much success using vector
sink even when i set a range for the data captured,
all doesnt seems right.

Is there any blks that will be useful for my
experiment? Or do i have to write my own C++ blk to
process my needs. Thanks again.

regards,
ShinHan

--- Eric Blossom <address@hidden> wrote:

> On Tue, Jan 08, 2008 at 08:26:43PM -0800, Wee
> Shinhan wrote:
> > Hi guys,
> > 
> > I'm using the vector_sink block to capture complex
> > data from the receiver USRP (in the hope to be
> able to
> > predict the wireless channel coeff) I printed the
> > recevied complex data using the rx_callback
> function
> > in receive_path.py script. The problem is the
> > vector_sink produces endless amount of complex
> number
> > even though my transmitter has already finish
> > transmitting. I connect my vector sink to
> > self.packect_receiver in receive_path.py, the
> vector
> > sink should be empty if no packet is received
> right?
> > If so why am i experiencing this problem. Please
> > advice. Thanks in advance.
> > 
> 
> It depends on where you've connected the
> vector_sink.
> 
> Note that vector_sink was really designed to be used
> only during QA
> testing.  It's not generally useful because it ends
> up trying to store
> a potentially infinite number of samples.
> 
> Eric
> 



      
____________________________________________________________________________________
Be a better friend, newshound, and 
know-it-all with Yahoo! Mobile.  Try it now.  
http://mobile.yahoo.com/;_ylt=Ahu06i62sR8HDtDypao8Wcj9tAcJ