optic.comm.modulation.demodulateGray

demodulateGray(symb, M, constType)

Demodulate symbol sequences to bit sequences (w/ Gray mapping).

Hard demodulation is based on minimum Euclidean distance.

Parameters:

• symb (array of complex constellation symbols) – sequence of constellation symbols to be demodulated.

• M (int) – order of the modulation format.

• constType (string) – ‘qam’, ‘psk’, ‘apsk’, ‘pam’ or ‘ook’.

Returns:

sequence of demodulated bits.

Return type:

array of ints

References

[1] Proakis, J. G., & Salehi, M. Digital Communications (5th Edition). McGraw-Hill Education, 2008.