Mitigation of Peak to Average Power Ratio in Orthogonal Frequency Division Multiplexing through SOP-PTS

Year : 2023 | Volume : 01 | Issue : 01 | Page : 32-39

    K. Srinivasa Rao

  1. Professor, Dhanekula Institute of Engineering and Technology, Andhra Pradesh, India


Orthogonal Frequency Division Multiplexing (OFDM) is a popular multicarrier modulation technology extensively employed in 4G wireless communication systems to transmit data over a dispersive channel. To address the Peak-to-Average Power Ratio (PAPR) issue in OFDM, a technique called Partial Transmit Sequence (PTS) is commonly utilized. The PTS method involves dividing the data block into non-overlapping sub-blocks and then combining them using phase factors to mitigate PAPR. However, the conventional PTS approach encounters a challenge as the number of sub-blocks increases, leading to exponentially growing search complexity due to the need to explore all possible phase factor combinations. To overcome this complexity and effectively reduce PAPR, a novel approach is proposed in this study, known as Particle Swarm Optimization (PSO)-based PTS technique. PSO is a bio-inspired algorithm capable of efficiently searching the solution space to find optimal solutions. By employing PSO, the proposed PSO-PTS method achieves a significant reduction in computational complexity, particularly for large sub-blocks, while obtaining lower PAPR levels. The simulation results demonstrate that the PSO-PTS approach outperforms the conventional PTS method.

Keywords: OFDM, PTS, Swam optimization algorithm, PAPR, digital radio transmissions

[This article belongs to International Journal of Radio Frequency Innovations(ijrfi)]

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Regular Issue Subscription Original Research
Volume 01
Issue 01
Received September 22, 2023
Accepted September 30, 2023
Published December 1, 2023