... MIMO Systems, Theory and Applications 82As shown in Fig. 12, the performance of both LS-based TBCE and SBCE-ML schemes in a MIMO 4×4 system is improved respect to MIMO 2×2. In the other hand, ... xTTppc (11) where V is the eigenvector matrix in (7), and it serves as the transformation matrix: 11 21 31 112 22 32 212 13 23 33 31 23 ,,,TTTTTTTTTNNNNNTNNNNvvv vvvv vvvv ... burst for a MIMO 2×2 system and 32 bits for a MIMO 4×4 system. Figure 16, illustrates the required number of training and information bits in SBCE-ML method for both MIMO 2×2 and MIMO 4×4. Considering...