Re: Random Correlation Detector


Tim Wescott wrote:
Luhan wrote:

Hi all,

The Project: Detect objects at some distance using Infarred
emiter/detector system using pseudo random signal.

The Problem: Does some method already exist to correlate an incomming
IR/PRN signal to detect it in the presence of other IR signals with
other PRN sequences?

Luhan

There are correlation methods that should work well in an IR
environment. If you AC couple the signal from your detector and perform
a linear correlation with your reference signal then that should do it.
Keep in mind that you'll have to sweep the time offset, essentially
searching for the signal in time.

I dont need to search for the PRN sequence since I'm generating it in
the same device, and there is no time lag to speak of (speed of light).
What IC and ciruit do I use to extract this signal.

Luhan

.

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