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Re: [Discuss-gnuradio] Using gr_sync_decimator [was: How to use forecast
From: |
Eric Blossom |
Subject: |
Re: [Discuss-gnuradio] Using gr_sync_decimator [was: How to use forecast()?] |
Date: |
Fri, 6 Aug 2010 10:21:38 -0700 |
User-agent: |
Mutt/1.5.20 (2009-08-17) |
On Fri, Aug 06, 2010 at 06:32:32AM -0700, Sammour wrote:
>
> Hi Eric,
> I have a similar issue as the one described above and I have read some of
> the examples in the directory provided but they seem to be different from
> what I want to implement. I want to collect L samples from N channels and
> store them in a buffer, do processing and output a vector of length N. I
> wrote the following code but it doesn't seem to be working properly. Some of
> them use loops from i=0 to noutput_items*vlen while others use from 0 to
> noutput_items. Also some of them don't use the function memcpy.
>
> I am using gr_sync_decimator with set_decimation(L) is written in the block
> constructor.
gr_sync_decimator with decimation == L correct, given what you've described.
Can you please show the beginning of your constructor, where you pass the
arguments to gr_sync_decimator's constructor?
Eric
> ---------------------------------------------------
> int my_package::work(.....) {
>
> gr_complexd *out =(gr_complexd *) output_items[0];
> const gr_complex *in[N];
>
> for (unsigned int i = 0; i<N; i++)
> in[i] = (const gr_complex *) input_items[i];
>
> for (int i = 0; i <noutput_items; i++){
> for(unsigned int k=0; k<N; k++)
>
> memcpy(&inbuffer[k][0],&in[k][i*L],L*sizeof(gr_complex)); //inbuffer is
> NxL matrix
>
> //Signal processing of inbuffer and storing the result in a
> vector
> // out_vector of length vect_lengx;
>
> memcpy(out, &out_vector.at(0),
> vect_lengx*sizeof(gr_complexd));
> out+=vect_lengx;
>
> }//end for
>
> return noutput_items;
> }
> ------------------------------------------------------
> Can you help me with this please?
>
> Thanks a lot.
>
> Sammour
> --
> View this message in context:
> http://old.nabble.com/How-to-use-forecast%28%29--tp28705301p29356450.html
> Sent from the GnuRadio mailing list archive at Nabble.com.