• Chembeti Lakshmi Bhargavi
• K. Rajashekar

Most of the peak-to-average power ration (PAPR) reduction techniques, such as partial transmit sequence (PTS) algorithm and selective mapping (SLM) algorithm, for conventional OFDM systems are not directly applied to FBMCOQAM systems because of the overlapping structure of filter bank multi-carrier with offset quadrature amplitude modulation (FBMC-OQAM) signals. Furthermore, the complexity of the existing algorithms based on PTS is very high for the FBMC-OQAM systems. In this paper, we propose a low-complexity PTS based on hybrid processing algorithm (H-PTS) to reduce the PAPR values of FBMC-OQAM systems. Firstly, the proposed algorithm processes phase factors of the PTS by double-layers search. As a result, the complexity of searching the optimal phase factors are simplified. Moreover, an efficient algorithm of estimating the PAPR values of the FBMC-OQAM signals is employed scheme based on a two-step optimization structure, named pre-treated partial transmit sequence (P-PTS) to further reduce computational complexity. The first step uses a multiple overlapping symbols joint optimization scheme that the phase rotation sequences for current symbol is determined and optimized according to previous overlapped symbols. And in the second step, it employs a novel segment PAPR reduction scheme based on PTS technique. Simulation results shows that, compared with the conventional PTS (C-PTS) algorithm and segmental PTS (S-PTS) algorithm, H-PTS and P-PTS, the proposed P-PTS algorithm achieve better PAPR reduction as well as lower computational complexity.

PTS, SLM, FBMC-OQAM, PAPR

"ENHANCED HYBRID APPROACH FOR PAPR REDUCTION IN FBMC-OQAM SYSTEMS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 8, page no.d409-d419, August-2021, Available :http://www.jetir.org/papers/JETIR2108423.pdf

"ENHANCED HYBRID APPROACH FOR PAPR REDUCTION IN FBMC-OQAM SYSTEMS", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 8, page no. ppd409-d419, August-2021, Available at : http://www.jetir.org/papers/JETIR2108423.pdf