[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [Discuss-gnuradio] xlating filter will introduce phase shift

From: Tom Rondeau
Subject: Re: [Discuss-gnuradio] xlating filter will introduce phase shift
Date: Sat, 13 Aug 2011 16:17:17 -0400

On Fri, Aug 12, 2011 at 3:50 AM, Page Jack <address@hidden> wrote:
> I use xlating filter to down convert signal. after I down convert signal it
> I decode it.
> however the data decoded is still the signal in 0 frequency before down
> convert.
> I check the xlating filter code it will change the signal phase to avoid
> aliasing, yeah
> it avoid aliasing but it is not the data I want how can I recover the data's
> phase after
> xlating filter?
> Regards!

Those filters are implemented as FIRs, which means they will have
linear phase in the passband and constant (and known) group delay.

In general, though, you will never know the phase of the incoming
signal received over the air. If you have a signal where you require
the phase, you'll have to figure out a way to recover it, anyways.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]