calculate SNR and watch a binary file
Markus Feldmann
feldmann_markus at gmx.de
Thu Mar 26 17:18:34 CDT 2009
Rob Mahurin schrieb:
> These files came from some analog-to-digital converter? If you look
> at them with hexdump, there is stuff that looks like data only in the
> first 200 bytes or so. The rest of the file looks likes zeros and
> the occasional 0x80bf. I wouldn't expect the data read from these
> files to have a meaningful Fourier transform.
>
> Cheers,
> Rob
>
The data can be watched with my method, but not be plotted.
I do not know how to collect the complex values and bits ?
Ok, here is a clipping from the data at the beginning:
0 + 0i
0 + 0i
-1 + 0i
0 - 1i
-13 + 2i
65 - 32i
-183 + 98i
412 - 233i
-831 + 478i
1572 - 918i
-3050 + 1745i
8314 - 4139i
-12548 - 5491i
3899 + 10329i
3523 - 2748i
-1791 + 1379i
951 - 738i
-484 + 378i
219 - 176i
-84 + 69i
19 - 20i
0 + 0i
0 - 1i
0 + 0i
0 - 1i
0 + 0i
0 - 1i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 + 0i
0 - 1i
0 + 0i
-1 - 1i
0 + 0i
-1 - 1i
0 + 0i
-1 - 1i
0 + 0i
-1 + 0i
0 - 1i
0 + 0i
-1 - 1i
0 + 0i
-1 + 0i
0 - 1i
-1 + 0i
How can i collect bits from the I or Q Signal ?
And i do not know whether these are 16 bit samples
or 32 bit ?
And i do not know where is the beginning of the
samples ?
Maybe the curious values at the beginning is the
start point ?
Regards Markus
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