[Discuss-gnuradio] BPSK, Costas loop

[Ilia Mirkin]

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