Re: [Discuss-gnuradio] Is Simple Framer and Simple Correllator blocks will synchronize my data?

[Martin Braun]

Hi Irfan,

you can't remove a filter delay.

If all of your sync is working, the packet encoder/decoder is probably 
what you want to use -- although I think I remember you've tried that 
before...?
In any case, to get rid of transients, prepend a preamble to your 
signal. As for the simple_* blocks, I don't think they work well over 
lossy channels (the packet decoder will allow some slack w.r.t. bit errors).

Cheers,
M



On 27.05.2014 09:03, Irfan Ullah wrote:
> Hi all,
> I am working on QPSK Transceiver I have done all the synchronization at
> receiver except frame delays means frame synchronization is lift. there
> are some delays in my recieved data at start I have some garbage values
> this delay is due to filters because filters produce one output sample
> for N input samples (N filter Taps). I want to remove this delay so
> please any one guide me can simple framer and simple correlator will be
> used for this purpose? I am currently trying to design my own out of
> tree blocks for frame synchronization but if the these two blocks(simple
> framer and simple correlator ) are suitable for this purpose or some
> modification is required in its code so that I can use it for my purpose.
>
> any help will be much appreciated and may your help will solve my many
> problems of this transciever please help me if YOU CAN.
>
> Regards ,
> Irfan Ullah
>
>
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