Re: [Discuss-gnuradio] Convert recorded FM wav file to I,Q values

On 06/28/2017 10:55 PM, Jahnavendra Mattipa wrote:
> Hello all,
> Is there any possibility to convert the recorded FM 'wav' file to I,Q
> values, if possible please tell me how to do this?

Well it depends upon what you mean by 'wav' file.

For a real valued signal with constant amplitude - my guess as to what
you mean, namely

Acos(wt+phi)

use the trigonometric identity

cos(wt+phi)=cos(wt)cos(phi)-sin(wt)sin(phi)

- which is easy to derive from complex exponentials.

Then set

I=Acos(phi)
Q=Asin(phi)

Hence

Acos(wt+phi)=Icos(wt)-Qsin(wt)

-- Cinaed

>
>
> Best reagards,
> M. Jahnvendra
>
>
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