Figure 3

Illustration of per-subcarrier antenna subset selection ( n T = 4, n D = 2, and K = 12). (a) Unbalance power selection. (b) Balance power selection.
Illustration of per-subcarrier antenna subset selection ( n T = 4, n D = 2, and K = 12). (a) Unbalance power selection. (b) Balance power selection.