Re: [Discuss-gnuradio] complex to mag^2 and squaring afterwards

[Marcus D. Leech]

On 03/23/2019 01:48 PM, Wayne Hilliard wrote:
> Hello,
> In my massive googling (actually DuckDuckGoing I've come across 
> information that suggests that after the complex to mag^2 operation 
> and filtering you should pass the flow through both inputs of a 
> multiple block to square it thus obtaining power.
>
> Is this correct? or did I misunderstand the whole thing? I think all I 
> have to do is the complex to mag^2. I am trying to find the reference 
> now but it eludes me.
>
> Thanks in advance!
>
> Wayne Hilliard
You misunderstood something along the way.

The instantaneous power of a signal can be estimated by a 
complex-to-mag**2.  One then usually filters it.

If one wants *RMS* power, then you take the square-root of that.

But there's no additional squaring operating required.