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[Discuss-gnuradio] OOK modulation naming

From: Michael Ossmann
Subject: [Discuss-gnuradio] OOK modulation naming
Date: Thu, 2 Apr 2015 12:16:54 -0600
User-agent: Mutt/1.5.22 (2013-10-16)

A friend recently showed me an OOK modulation that I had never seen
before, and I'm wondering if anyone knows a name for this scheme.

It is PWM where both the on periods and off periods carry data in their

In the example we observed, an on or off period with a duration of two
units represents a zero.  An on or off period with a duration of one
unit represents a one.  Example:


This sequence of amplitudes represents the binary data 011101001.

Note that this scheme has a variable data rate.  (Two packets carrying
the same number of bits may have different durations.)  Overall,
however, the data rate is higher than in a similar looking scheme in
which data are encoded only in the on periods.

Does anyone know what to call this?  I am tempted to call it Biphase



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