A low PAPR performance with new segmentation schemes of partial transmit sequence for OFDM systems

Abstract

Despite the fact that OFDM has numerous features, the high peak-to-average power ratio (PAPR) deems one of the challenging disadvantages face by the system in the real applications. The high PAPR limits the OFDM signal efficiency on the transmitter side. Thus many PAPR alleviation approaches have been suggested in the past. Partial transmit sequences (PTS) has been accounted as one of the successful procedures for decreasing the high PAPR; with the consideration that the computational complexity of the PTS method regarded high relatively. Moreover, improving the PAPR mitigation performance of the PTS algorithm relies upon the number of the partitioned subblocks, the number of the phase rotation vectors, and the kind of the segmentation scheme utilized. This article presents new segmentation schemes to enhance the PAPR mitigation execution without further intricacy on the system. Adjacent shifting segmentation scheme (Ad-Sh-PTS) and rows exchange of interleaving segmentation schemes (IL-Ex-PTS) are proposed depending on the two well-known segmentation schemes of adjacent partition PTS (Ad-PTS) and interleaving partition PTS (IL-PTS). The simulation demonstrates that the suggested algorithms can accomplish mitigation in PAPR preferable compared to the traditional schemes, Ad-PTS and IL-PTS schemes.

New low-complexity segmentation scheme for the partial transmit sequence technique for reducing the high PAPR value in OFDM systems

“…[26]. [26] by 56.25% and 31.25% when N = 256, 55.55%, and 33.33% when N = 512, and 55% and 35% when N = 1,024, respectively. In the Sb-PTS scheme, every subblock is partitioned into N/(V/2) subsets, and each subset includes (V/2) samples.…”

“…As a comparison, a scheme based on dividing the active subcarriers in each subblock of the Ad-PTS matrix into two equal parts in such a way that the first part is fixed in its position and the second part is shifted by (V − 1) positions, where V represents the number of subblocks, was proposed in Ref. [21], [22], and [26], where CCRR add and CCRR mult of the proposed method are higher than those of the method in Ref. This process continues until the last row of the Ad matrix to produce a new scheme named Ad-Sh-PTS.…”

“…[21], [22], and [26] because the proposed scheme has fewer IFFT stages. The PR-PTS scheme is considered to be the best scheme that can reduce the PAPR value because its samples are randomly assigned within the subblocks, and this leads to a reduction in the PAPR value.…”

“…Another algorithm is described in [22], where the authors introduced the random interleaved segmentation method in a new approach. Recently, Jawhar and others [24][25][26] have proposed several types of subblock partitioning schemes to improve the PAPR reduction performance. Recently, Jawhar and others [24][25][26] have proposed several types of subblock partitioning schemes to improve the PAPR reduction performance.…”

“…Moreover, Ibraheem and others [23] developed a new algorithm using two types of partitioning schemes. Recently, Jawhar and others [24][25][26] have proposed several types of subblock partitioning schemes to improve the PAPR reduction performance. However, most previous studies do not take into account the computational complexity of the proposed algorithms.…”