Linear and Non-Linear Companding Transformation Reducing PAPR in OFDM Signals
Sadu Venkata Naresh1, P. V. Naganjaneyulu2, P. Nageswara Rao3
1Sadu Venkata Naresh, Research Scholar, JNTUH, Hyderabad (Telangana), India.
2Dr. P. V. Naganjaneyulu, Principal & Professor, Department of ECE, SMCE, Guntur (A.P), India.
3Dr. P. Nageswara Rao, Director & Professor, Department of ECE, MPES, Guntur (A.P), India.
Manuscript received on 07 September 2019 | Revised Manuscript received on 16 September 2019 | Manuscript Published on 26 October 2019 | PP: 461-463 | Volume-8 Issue-11S2 September 2019 | Retrieval Number: K107409811S219/2019©BEIESP | DOI: 10.35940/ijitee.K1074.09811S219
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© The Authors. Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open-access article under the CC-BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: An important disadvantage of Orthogonal Frequency Division Multiplexing (OFDM) signals is high peak-to-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.
Keywords: Companding Transform (CT), Non-Linear, Hyperbolic Tangent Sigmoid Transfer Gunction, OFDM, Peak-to-average Power Ratio(PAPR).
Scope of the Article: Digital Signal Processing Theory