next up previous contents
Next: Even values of Up: ADSL Previous: Constellation encoding

Constellation encoder

For a given sub-channel, the encoder selects an odd point (X,Y) from the square-grid constellation based on the bits . For convenience of description, these bits are identified with an integer label whose binary representation is . For example, for , the four constellation points are labeled 0, 1, 2, 3 corresponding to , respectively.



Kimmo K. Saarela
Mon Mar 6 12:47:27 EET 1995