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  Binary Phase Shift Keying

With this method, demodulation works on 180 degree phase changes. Each signal element (one or more wavelengths) can represent either a '1' or a '0' depending on whether it is in phase or out of phase with a clock signal. An example illustration follows:

BPSK Example

There are two ways to demod a wave using this method, depending on which bit you care to start with. I decoded the picture according to these rules and came up with the following equivalent results:

0 1 0 1 1 1 0 1 1 1 0 1 1 0 1 0 0 0 0 1 0 0 0 0 1 0 1 1 1 0 0 1 1 0 0 1 1 0 1 1 1 1 0 1 1 0 0 1 0 0 0 1 1 1 0 0 0 1 1 1 0 1 0 0 1 1 0 0 1 0 1 1 1 1 0 1 1 1 1 1 1 0 0 1 1 0 0 1 1 0 0 1 0 0 0 1 1 1 0 1 0 1 0 0 0 1 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 1 1 0 1 0 0 0 1 1 0 0 1 1 0 0 1 0 0 0 0 1 0 0 1 1 0 1 1 1 0 0 0 1 1 1 0 0 0 1 0 1 1 0 0 1 1 0 1 0 0 0 0 1 0 0 1 0 0 1 0 0 0 1 1 0 0 0 1 1 0 1 1 1 0 0 0 1 1 0 0 1 0 0 0 1 1 1 0 0 1 0 1 1 1 0 1 1 0 0 0 1 1 0 1 1 1 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 1 1 0 1 0 1 0 1 1 1 0 1 0 1 1 0 1 1 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 0 1 0 1 0 0 0 1 0 0 0 0 1 0 0 1 0 0 0 1 1 0 0 1 1 0 1 1 1 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 1 1 0 0 1 0 0 1 0 1 0 1 1 0 1 0 0 0 0 1 0 0 1 1 0 0 1 0 0 0 0 1 0 1 1 0 1 0 1 0 1 1 0 0 0 1 1 0 1 1 1 0 0 0 1 0 0 1 1 0 1 1 0 1 1 1 1 0 1 1 0 1 1 1 0 0 1 0 1 0 0 1 0 0 0 1 0 0 0 0 1 0 1 1 1 1 0 0 1 0 0 1 0 1 1 1 1 0 1 1 0 0 1 1 0 0 1 0 1 0 1 1 0 1 1 0 1 1 1 0 0 1 1 0 0 1 0 0 0 1 1 1 0 0 1 0 0 1 0 0 0 1 1 0 0 0 1 1 0 1 1 1 1 1 1 1 0 0 1 0 0 0 1 1 1 0 1 1 0 0 1 1 0 0 0 0 0 1 1 0 0 1 1 0 1 1 0 0 0 0 1 1 0 1 1 0 1 0 1 0 0 1 0 1 1 1 1 0 1 1 1 0 0 1 0 0 0 1 1 0 1 1 1 1 1 0 1 1 0 0 1 1 1 1 1 1 0 1 1 0 0 0 1 1 1 1 1 0 1 1 0 0 0 1 1 0 0 1 0 0 0 1 1 1 0 1 0 1 1 0 1 1 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 0 0 1 1 0 1 1 1 1 0 1 0 1 0 1 0 0 0 1 0 0 0 1 1 0 1 0 0 0 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 1 0 1 1 1 0 0 0 1 0 1 0 0 1 1 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 0 1 1 0 1 1 1 0 0 0 1 1 0 1 1 0 1 1 1 0 0 1 1 0 1 1 0 0 1 0 0 0 1 0 1 0 0 1 1 0 1 1 0 0 1 1 0 0 1 0 0 1 0 0 0 0 1 1 0 1 1 1 0 0 0 1 0 1 0 1 0 0 0 1 0 0 0 1 0 1 1 0 0 1 1 0 0 1 1 1 0 1 0 0 0 1 1 0 0 1 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 0 0 1 0 0 0 1 0 0 1 0 0 0 1 1 0 0 0 1 1 0 1 1 1 0 0 0 1 1 1 0 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 1 1 0 0 1 1 0 0 1 0 0 1 0 0 0 1 1 0 1 0 1 0 1 1 0 0 0 1 1 0 1 1 1 0 0 0 1 1 0 1 1 0 1 1 0 0 1 1 0 1 0 0 1 0 0 0 1 0 0 1 1 0 1 0 0 0 0 1 0 0 1 1 0 0 1 0 0 1 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 1 1 0 0 1 0 0 1 1 1 1 0 0 1 0 0 0 0 0 0 1 1 0 0 1 1 0 1 0 1 0 1 1 1 0 1 0 1 1 1 0 1 1 0 0 1 0 0 0 1 1 1 0 0 1 0 0 0 1 0 0 0 0 0 0 1 0 0 1 1 0 1 1 1 0 0 0 1 0 1 1 1 0 0 1 1 1 0 1 1 0 1 1 1 0 0 1 1 0 0 1 0 0 0 1 1 1 0 1 0 1 1 0 0 1 0 0 1 1 0 0 1 1 0 1 1 0 1 1 1 1 0 0 1 0 0 0 1 1 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 0 0 1 1 0 1 1 1 0 1 1 0 1 0 0 0 0 1 0 0 0 1 1 0 1 1 1 0 0 0 1 0 0 1 1 0 1 1 0 1 1 1 0 1 0 0 1 0 0 1 1 1 0 1 1 0 1 0 0 0 0 1 0 0 1 1 0 1 0 0 0 0 1 0 0 0 0 1 0 1 1 1 1 0 0 1 1 0 0 1 0 0 0 1 1 1 0 0 0 1 1 0 1 1 1 1 1 1 1 0 1 0 1 1 1 0 1 0 1 1 0 0 1 0 0 0 1 1 1 0 0 0 1 0 1 1 1 0 0 1 1 1 0 0 1 0 0 0 1 1 1 0 1 0 1 0 0 1 1 1 0 0 1 1 0 0 0 1 0 0 1 0 0 0 0 1 1 0 1 1 1 0 0 0 1 0 1 0 0 1 1 0 0 1 1 0 1 0 1 1 0 0 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 0 0 1 0 1 1 1 1 0 1 1 0 1 0 0 0 0 0 0 0 0 0 0


1 0 1 0 0 0 1 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 1 1 0 1 0 0 0 1 1 0 0 1 1 0 0 1 0 0 0 0 1 0 0 1 1 0 1 1 1 0 0 0 1 1 1 0 0 0 1 0 1 1 0 0 1 1 0 1 0 0 0 0 1 0 0 0 0 0 0 1 1 0 0 1 1 0 0 1 1 0 1 1 1 0 0 0 1 0 1 0 1 1 1 0 1 1 1 0 1 1 0 1 0 0 0 0 1 0 0 0 0 1 0 1 1 1 0 0 1 1 0 0 1 1 0 1 1 1 1 0 1 1 0 0 1 0 0 0 1 1 1 0 0 0 1 1 1 0 1 0 0 1 1 0 0 1 0 1 1 1 1 0 1 1 0 1 1 0 1 1 1 0 0 1 1 1 0 0 1 0 0 0 1 1 1 0 0 1 1 0 1 1 1 0 0 0 1 1 0 1 0 0 0 1 0 0 1 1 1 0 0 1 0 0 0 1 1 1 0 1 1 0 1 0 0 0 0 1 0 0 0 0 1 0 1 0 1 0 0 0 1 0 1 0 0 1 0 0 1 1 1 0 1 1 0 1 0 0 0 0 1 0 0 1 0 1 0 1 1 1 0 1 1 1 1 0 1 1 0 1 1 1 0 0 1 1 0 0 1 0 0 0 1 1 1 0 1 1 0 1 0 0 0 0 1 0 0 0 0 1 1 0 1 1 0 1 0 1 0 0 1 0 1 1 1 1 0 1 1 0 0 1 1 0 1 1 1 1 0 1 0 0 1 0 1 0 1 0 0 1 1 1 0 0 1 0 0 0 1 1 1 0 1 1 0 0 1 0 0 1 0 0 0 0 1 0 0 1 0 0 0 1 1 0 1 0 1 1 0 1 1 1 0 1 1 1 1 0 1 0 0 0 0 1 1 0 1 1 0 1 0 0 0 0 1 0 0 1 1 0 0 1 1 0 1 0 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 1 0 1 1 1 0 0 0 1 1 0 1 1 0 1 1 1 0 0 1 1 1 0 0 1 0 0 0 0 0 0 0 1 1 0 1 1 1 0 0 0 1 0 0 1 1 0 0 1 1 1 1 1 0 0 1 1 0 0 1 0 0 1 1 1 1 0 0 1 0 0 1 0 1 0 1 1 0 1 0 0 0 0 1 0 0 0 1 1 0 1 1 1 0 0 1 0 0 0 0 0 1 0 0 1 1 0 0 0 0 0 0 1 0 0 1 1 1 0 0 0 0 0 1 0 0 1 1 1 0 0 1 1 0 1 1 1 0 0 0 1 0 1 0 0 1 0 0 1 1 1 0 1 1 0 1 0 0 0 0 1 0 0 1 1 0 0 1 0 0 0 0 1 0 1 0 1 0 1 1 1 0 1 1 1 0 0 1 0 1 1 1 1 0 1 1 0 0 1 1 0 0 1 0 1 0 1 1 0 1 1 0 1 1 1 0 0 1 1 0 0 1 0 0 0 1 1 1 0 1 0 1 1 0 0 1 0 0 1 1 0 0 1 1 0 0 1 0 1 0 1 1 0 0 1 0 0 0 1 1 1 0 0 1 0 0 1 0 0 0 1 1 0 0 1 0 0 1 1 0 1 1 1 0 1 0 1 1 0 0 1 0 0 1 1 0 0 1 1 0 1 1 0 1 1 1 1 0 0 1 0 0 0 1 1 1 0 1 0 1 0 1 1 1 0 1 1 1 0 1 0 0 1 1 0 0 1 1 0 0 0 1 0 1 1 1 0 0 1 1 0 0 1 1 0 1 1 0 1 1 1 0 0 1 1 0 1 1 0 1 1 1 0 1 1 0 1 1 1 0 0 1 1 1 0 0 1 0 0 0 1 1 1 0 0 0 1 1 1 1 1 1 0 1 1 1 1 1 0 1 1 1 0 0 1 1 0 0 1 1 0 1 1 0 1 1 1 0 0 1 0 1 0 1 0 0 1 1 1 0 0 1 0 0 0 1 1 1 0 0 1 0 0 1 0 0 1 1 0 0 1 0 1 1 0 1 1 1 0 1 1 0 0 1 0 1 1 1 1 0 1 1 0 0 1 1 0 1 1 0 1 1 1 1 0 1 1 0 1 1 1 0 0 1 0 1 0 0 1 1 0 1 1 0 0 0 0 1 1 0 1 1 1 1 1 1 0 0 1 1 0 0 1 0 1 0 1 0 0 0 1 0 1 0 0 0 1 0 0 1 1 0 1 1 1 0 0 0 1 1 0 1 1 1 0 1 1 1 1 1 1 0 1 1 0 0 1 0 0 0 1 1 1 0 1 0 0 0 1 1 0 0 0 1 0 0 1 0 0 0 1 1 0 0 1 1 0 1 1 1 0 0 0 1 0 1 0 0 1 1 0 1 1 0 0 1 1 0 0 1 0 0 1 0 0 0 0 1 1 0 1 1 1 0 0 0 1 1 0 1 1 0 1 1 1 0 0 1 1 0 1 1 0 0 1 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 1 0 0 1 0 0 0 1 1 1 0 1 1 0 0 1 0 0 1 0 0 0 1 0 1 1 0 1 1 0 0 0 1 0 0 1 0 1 1 1 1 0 1 1 0 0 1 0 1 1 1 1 0 1 1 1 1 0 1 0 0 0 0 1 1 0 0 1 1 0 1 1 1 0 0 0 1 1 1 0 0 1 0 0 0 0 0 0 0 1 0 1 0 0 0 1 0 1 0 0 1 1 0 1 1 1 0 0 0 1 1 1 0 1 0 0 0 1 1 0 0 0 1 1 0 1 1 1 0 0 0 1 0 1 0 1 1 0 0 0 1 1 0 0 1 1 1 0 1 1 0 1 1 1 1 0 0 1 0 0 0 1 1 1 0 1 0 1 1 0 0 1 1 0 0 1 0 1 0 0 1 1 0 1 1 0 0 1 1 0 0 1 1 0 1 0 1 0 1 1 0 1 0 0 0 0 1 0 0 1 0 1 1 1 1 1 1 1 1 1 1