Constellation Diagrams

[magnetra]

Are constellation diagrams always 2-D?

 

[ahmedseu]

It may be M-dimensional as in MFSK modulation.

 

[xischaune]

Constellation diagrams are 2-D only for the sake of understanding of the reader....

Otherwise they are usually N-Dimensional where N is the number of BASIS FUNCTIONS...

3-D FSK constellations do not exist but are usually refered to for the sake of understanding....

 

[ahmedseu]

If the N frequencies are orthogonal, then, the constellation diagram is N-dimensional.

More information can be found in Comm. Systems (Haykin), page 380
6.5 Coherent Frequency-Shift Keying

 

[bulx]

Constellation diagrams are 2D, but modulation schemes neednt be. For example, you could have a multicarrier modulation scheme, so there exists a constellation diagram for every carrier, each of which is say QAM modulated.
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