Comments and Corrections on “A Novel QO-STBC Scheme With Linear Decoding for Three and Four Transmit Antennas”

In the above letter, Park
et al.
proposed a quasi-orthogonal space-time block code (QO-STBC). We claim that the proposed QO-STBC does not improve the performance over the conventional QO-STBC presented by O. Tirkkonen
et al.