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[Discuss-gnuradio] Question regarding correlating output and IQ samples


From: abhinav narain
Subject: [Discuss-gnuradio] Question regarding correlating output and IQ samples in a reciever
Date: Sun, 24 Jan 2016 11:03:45 -0800

Hi all,
This might be too simple, but I wanted to confirm as I am not sure how the
blocks manipulate the IQ samples and how AGC works, does it add more
samples for compensating the noise average or not.

I have a flowgraph(image attached) which dumps the IQ samples and the bits after using Polyphase Clock Sync. I want to find exact IQ samples corresponding to
a specific preamble in the bitsequence I have obtained in the output
file.
Let say the starting position of sample is= P, the sample rate=S ksps, samples \
per symbol=Y.

Is it correct to assume that the index of iq samples corresponding to
preamble in the IQ file will be at index P*Y ?
If preamble size is 32 bits then there will be 32*Y of them ?

Thanks,
Abhinav

Attachment: Screenshot from 2016-01-24 14:00:42.png
Description: PNG image


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