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[Discuss-gnuradio] BPSK, Costas loop

From: Ilia Mirkin
Subject: [Discuss-gnuradio] BPSK, Costas loop
Date: Thu, 31 Mar 2005 03:09:32 -0500

Hey everyone,

I think I have a semi-decent implementation of BPSK modulation and
demodulation (via a Costas loop). I wrote up some details about it at
http://web.mit.edu/imirkin/www/gnuradio/bpsk.html . It seems to work
with the script that I was testing it with, but I haven't actually tried
anything OTA or with any *real* drift and so on. This applies into the
gnuradio-core tree directly.

(BTW -- the path I'm on is implementing a CDMA-style system; this was
the first step, i.e. a bit carrier. I might implement QPSK later, which
is what cellular CDMA systems use. Of course, cellular CDMA is really
really complicated; I'm just aiming to be able to synchronize and tell a
small handful of codes apart, hopefully in real time.)

Let me know if you have questions, comments, suggestions, etc.

Ilia Mirkin
imirkin at mit dot edu

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