Re: [Discuss-gnuradio] Re: uses gr.file_sink 32 bit or 64 bit

[Brian Padalino]

On Fri, Mar 27, 2009 at 8:36 PM, feldmaus <address@hidden> wrote:
> Markus Feldmann <feldmann_markus <at> gmx.de> writes:
>
>>
>> Ok, here is a clipping from the data at the beginning:
>>         0 -     1i
>>        -1 +     0i
>
> As you said the Output is stored as 64 bit value, 32bit I and 32 bit Q,
> but I and Q do have bot real and complex values ?!
> As you can see, every line consists only one real and one complex value.
>
> Wherefor is the first line ?
> For the I part or the Q part ?
> Does the lines of the I and Q part change from line to line ?
>  0 - 1i --> real(I) - imag(I)
>  -1 + 0i --> real(Q) + imag(Q)

You may want to refresh your knowledge of complex numbers:

    http://en.wikipedia.org/wiki/Complex_number
    http://www.dspguru.com/info/tutor/QuadSignals.pdf

Brian