4 16 8 

0	8	2	10
0	8	2	10
1	9	3	11
1	9	3	11
0	8	2	10
0	8	2	10
1	9	3	11
1	9	3	11
4	12	6	14
4	12	6	14
5	13	7	15
5	13	7	15
4	12	6	14
4	12	6	14
5	13	7	15
5	13	7	15


0	6	2	4
2	4	0	6
6	0	4	2
4	2	6	0
4	2	6	0
6	0	4	2
2	4	0	6
0	6	2	4
1	7	3	5
3	5	1	7
7	1	5	3
5	3	7	1
5	3	7	1
7	1	5	3
3	5	1	7
1	7	3	5

This is the rate 2/3 Ungerboeck code with 16 states for 8-PSK (natural mapping).
The states are defined in typical way. 

d_free^2 =  2.274^2Es --> 7.13 dB (so gain of 4.13 dB over uncoded QPSK)

Parity check matrix in octal: [16 04 23] 

Generator Matrix:

[ D	1+D+D^2	0
  1+D^2	D^2	D]