PAPR REDUCTION IN OFDM SYSTEM USING ADAPTIVE HYBRID TECHNIQUE

2nd International Conference on Sustainable Engineering Techniques

工业技术（总论）

Ghaffoori, Ali Jasim^1

Department of Electrical Power Techniques Engineering, Al-ma'Moun University College, Baghdad, Iraq^1

关键词: Average power ratios;    Discrete Cosine Transform(DCT);    Discrete sine transforms;    Hybrid techniques;    OFDM systems;    PAPR reduction;    Selected mapping;    Sub-carriers;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/518/5/052021/pdf
DOI  :  10.1088/1757-899X/518/5/052021

学科分类：工业工程学

来源: IOP

【 摘 要 】

The Average Power Ratio (PAPR) in high peak is still a standout amongst the most critical difficulties in Orthogonal Frequency Division Multiplexing (OFDM) framework. In this paper, we propose a new plan in light of Selected Mapping (SLM) method for PAPR decrease in OFDM system. The proposed plan is a versatile half and half plan, which depends on the SLM procedure and different change systems. In the proposed plan, rather than utilizing just Discrete Fourier Change (DFT) in OFDM structure, we propose to utilize Discrete Sine Transform (DST), Discrete Cosine Transform (DCT) and Discrete wavelet Transform (DWT) too to get the least PAPR. What's more, the duplicated stage in the SLM is adjusted to lessen the PAPR to an adequate low PAPR level. Simulation results demonstrate that the proposed plan procedure can decrease the PAPR to around 7.5 dB in the event of 256 sub-transporters and if there should be an occurrence of 512 subcarriers around 8 dB at clipping probability of 10-3.