Reduction of peak-to-average power ratio (PAPR) in

orthogonal frequency-division multiplexing (OFDM) system using

the partial transmit sequence (PTS) approach. In PTS, the total

search for the number of subblocks and the rotation factors must

be accomplished. As the number of subblocks and rotation factors

increases, PAPR reduction improves. The number of calculation

increases as the number of subcarriers increases, such that

complexity increases exponentially and the process delay occur

simultaneously. In this paper, a modified PTS scheme combined

with interleaving technique for PAPR reduction has been

presented. The scheme is very effective and avoids the use of any

extra Inverse Fast Fourier Transformations (IFFTs) as was done

in PAPR reduction by ordinary PTS technique when dividing the

various subcarriers into different subblocks. The simulation

result shows that PAPR performance is improved in comparison

with the modified PTS and computational complexity is reduced