which can be realized by using an N-point IFFT. However, xi,n
obtained by (4) may miss the peak power of xi(t) and result
in an overly optimistic PAPR estimation. It was verified in [9]
that the PAPR estimated from the samples using L = 4 times
oversampling can closely approximate that of (3). Because the
two signals x1 and x2 are correlated and transmitted simultaneously
from antennas TX1 and TX2, respectively, the PAPR of
SFBC MIMO-OFDM systems should be considered jointly as