Re: [Discuss-gnuradio] SNR estimator block output problem

[Tom Rondeau]

On Mon, Mar 17, 2014 at 10:36 AM, zielalaoui <address@hidden> wrote:
> Hi all,
> I try to create a new block able to generate integer values depending on the
> output values giving by the SNR estimator block (already available in
> Gnuradio library). Normally the estimator black should give the SNR in dB so
> a float value, but in the C++ file the output is defined as double
> (complex). Moreover, the program code contains this line:
>           *double x = abs(input[i+1])*
> So, I want to understand why x is double and it is not a float? Any help
> will be appreciate.
> Thanks

The running averager used internally is pretty sensitive to the
precision, so we calculate it internally as double precision. You can
cast the result down to a float if you want.

Honestly, we could probably get away with using floats here
considering how rough any real SNR estimate is, anyways.

Tom