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[Discuss-gnuradio] correlation question

From: Wayne Hilliard
Subject: [Discuss-gnuradio] correlation question
Date: Fri, 25 Jan 2019 11:45:55 +0000

Hello all,
New to the list and Gnuradio. Been futzing around with a RTL/SDR and Hackrf. Have been receiving NOAA  APT transmissions. Have been working on analyzing the signal. Each frame starts with a 1040hz square wave for a sync pulse.

I've tried to teach myself correlation with a FIR filter to detect the sync pulse.
To this end I have a small sample flow graph that I think is correct and which just uses a vector source to generate a square wave to experiment with. The goal is just to verify I understand correlation in this context.

I have attached the flow graph to this email. If you could please let me know if I'm on the right track and if not what I need to change/correct.

Wayne Hilliard

Attachment: vector.grc
Description: application/gnuradio-grc

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