On Tue, May 20, 2014 at 5:06 AM, Martin Braun <martin.br...@ettus.com>wrote:
> On 19.05.2014 13:23, Irfan Ullah wrote: > >> Hi all, >> I am using QPSK Mod and demod I have issue of how to synchronize >> my frame means how to remove delays from my received data in using GRC >> block my flow graph is attached with this mail. I am trying to use >> packet encoder and decoder for frame synchronization but it is not >> working with my mod and demod. >> > > Hey Irfan, > > I'm not sure phase is preserved in your flow graph. I recommend you start > with a few components and slowly add things until you realize where the > problem lies. Make use of the GUI sinks to check out signals and > constellations. > > Martin > Indeed. One of the reasons we often use differential encoding. Tom
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