Re: [Discuss-gnuradio] Phase unwrapping

[Matt Ettus]

Daniele,

The problem with phase unwrapping is that it is unbounded, and will tend to infinity.  Once it gets very big, when you try to add a small number to a very big number, floating point loses precision.  Eventually, adding small to extremely big returns the big number unchanged.  This isn't that useful.

Matt

On Mon, Jun 16, 2014 at 2:40 PM, Daniele Nicolodi <address@hidden> wrote:

Hello,

I just started to work with GNU radio for my very basic needs, so please
excuse my naive questions and probably my inappropriate use of the jargon.

My first trivial application of GNU radio is to simply measure the phase
of a phase modulated signal with an Ettus Research USRP N210 and a LFRX
daughter-board.

Everything works as expected, but I haven't found a way to do phase
unwrapping (removing the 2pi ambiguity in the phase obtained from the
arctan function looking at discontinuities in the phase data). Is this
functionality offered somewhere, and I missed it, or should I look into
implementing it myself?

Thanks. Cheers,
Daniele

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