Table 1 Signal points S N having N nearest neighbors
From: SEP performance of triangular QAM with MRC spatial diversity over fading channels
| S 2 | S 3 | S 4 | S 5 | S 6 | |
|---|---|---|---|---|---|
| TQAM | 2 | \( \sqrt{M} \) | \( 2\left(\sqrt{M}-2\right) \) | \( \sqrt{M}-2 \) | \( M-4\sqrt{M}+4 \) |