  One of the major drawbacks of orthogonal frequency division multiplexing
(OFDM) signals is the high peak to average power ratio (PAPR) of the
transmitted signal. Many PAPR reduction techniques have been proposed in the
literature, among which, partial transmit sequence (PTS) technique has been
taken considerable investigation.However, PTS technique requires an exhaustive
search over all combinations of allowed phase factors, whose complexity
increases exponentially with the number of sub-blocks. In this paper, a newly
suboptimal method based on modified artificial bee colony (ABC-PTS) algorithm
is proposed to search the better combination of phase factors. The ABC-PTS
algorithm can significantly reduce the computational complexity for larger PTS
subblocks and offers lower PAPR at the same time. Simulation results show that
the ABC-PTS algorithm is an efficient method to achieve significant PAPR
reduction.
