Re: [Discuss-gnuradio] Receiving BPSK signal

[Martin Braun (CEL)]

Using rect pulse shapes is generally not a good idea. Why do you want
that?

...but let's assume you have a good reason:

On Fri, Jan 11, 2013 at 07:41:29AM -0800, luca wrote:
> -) In the Polyphase Clock Sinc I expected to find the same taps used in the
> tx side (Polyphase Resampler).  But other taps are used.. Why ? and
> according to which approach are they generated ? 

They are the same (RRC filter on both Tx an Rx).

> -) then..in case of rect pulse, the taps should be a ones vector.. do you
> agree ?

Yes.

> -) in any case, the FLL requires the excess bandwidth, so it seems it
> doesn't support no-srrc modulation. 

That's how the FLL works. In theory, you need a different freq sync for
rectangular pulse shape.
The way it's implemented, it might even work, though, if you leave the
rolloff at .35.

MB
-- 
Karlsruhe Institute of Technology (KIT)
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