Example constellation for the case is shown in figure .

**Figure:** Constellation labels for and

if is odd and greater than 3, the 2 MSBs of X and the 2 MSBs of Y are determined by the 5 MSBs of the bits.

The 7-bit constellation can be obtained from the 5-bit constellation by replacing each label by the 2x2 block of labels:

Mon Mar 6 12:47:27 EET 1995