Open AccessLinear and Non-Linear Companding Transformation Reducing PAPR in OFDM Signals
Publication year - 2019
Publication title -
international journal of innovative technology and exploring engineering
Language(s) - English
Resource type - Journals
ISSN - 2278-3075
DOI - 10.35940/ijitee.k1074.09811s219
Subject(s) - companding , orthogonal frequency division multiplexing , transformation (genetics) , computer science , nonlinear system , power (physics) , matlab , electronic engineering , algorithm , mathematics , telecommunications , engineering , channel (broadcasting) , biochemistry , chemistry , physics , quantum mechanics , gene , operating system
An important disadvantage of Orthogonal Frequency Division Multiplexing (OFDM) signals is high peakto-average power ratio (PAPR), causing genuine debasement popular execution when a nonlinear power amplifier (PA) is utilized. A notable technique to diminish power ratio deprived of confinements on framework parameters is Companding Transform (CT), for example, the sum of subcarriers, outline organization, and gathering type. Another nonlinear companding change, the utilization of hyperbolic transfer sigmoid function capacity is proposed for PAPR decrease in this paper. The proposed methodology extends the little flag and packs the pinnacle flag in the time zone at the same time without changing the average power. Results dependent on MATLAB demonstrate that the proposed methodology increases additional pinnacle decrease and improves the BER (bit error ratio)execution.