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Re: [Discuss-gnuradio] OOK modulation naming

From: John Ackermann N8UR
Subject: Re: [Discuss-gnuradio] OOK modulation naming
Date: Thu, 02 Apr 2015 14:36:11 -0400
User-agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:24.0) Gecko/20100101 Thunderbird/24.6.0

Why not make the ratio 1:3 and then you could call it Morse PWM. :-)

On 4/2/2015 2:16 PM, Michael Ossmann wrote:
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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