  Unique Word Orthogonal Frequency Division multiplexing (UW-OFDM) is a variant
of the multicarrier technique that has shown better bit error performance
compared to cyclic prefixed (CP-)OFDM. Like other multicarrier techniques,
UW-OFDM suffers from the high peak-to-average-power ratio (PAPR) problem, which
is an obstacle ahead of practical implementation of UW-OFDM. In this paper, the
generator matrix, which is inherent to UW-OFDM, is not only used to create the
specific UW-OFDM system, but also to reduce the PAPR. To do so, a suitable
optimization problem is developed, and solved using the Procrustes method. The
main advantage of the proposed method is that the built-in generator matrix
should be calculated only once for each system setting, and the PAPR reduction
(PAPR-R) is achieved without any overhead redundancy. Simulation results are
provided for evaluating the PAPR-R performance of the proposed method.
