Re: vector index selector

[Ali G. Dezfuli]

Thanks, Marcus, but I actually want to have something like a general demultiplexer to separate the preamble from the payload.

I couldn't find a SIMPLE demuxer ("Header/Payload Demux" is very complicated.)

What you kindly said is something like a general downsampler/decimator which of course has its own use.

For example, with a correlator, I put a tag at the frame start, and with "Tagged Stream Aligned" and "Stream to Vector" I will have a ready-to-be-demuxed frame to get to the payload.

On Mon, Nov 15, 2021 at 2:14 PM Marcus Müller <mueller@kit.edu> wrote:

Hi!
Not in itself, but you can do

---vector-->
  [Vector to Stream, num items = n]
   --->
    [Keep M in N, M=1, N=n, initial offset=index]
     ---->

Best regards,
Marcus

PS: A PR to improve "keep M in N" to directly deal with vectors, or to add a block "Vector
Extract" that does what you describe (take vectors in, and have a parameter with indices
to extract) to master, would certainly be welcome.

On 14.11.21 07:55, Ali G. Dezfuli wrote:
> Hi all,
> is there a block in GRC to get a vector and output a vector with selected indexes (as a
> parameter)?
> thanks,
> AGD