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Pilot-Based Compensation Scheme for Signal Distortion with Hexagonal Constellation

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Abstract

Quadrature Amplitude Modulation (QAM) is a multi-level modulation scheme applied to achieve high data transmission rates. In the 16-QAM scheme, high Peak-to-Average Ratio (PAPR) is an issue as wireless communication devices are required to be small with high power efficiency. To resolve this issue, hexagonal constellation symbol mapping has been proposed to reduce the PAPR. In a real environment, Orthogonal Frequency Division Multiplexing (OFDM) systems are sensitive to signal distortions such as multipath channel and frequency offsets. When the pilot signals are used to compensate the signal distortion, the combination of pilot signals and mapping need to be considered. The paper investigates the PAPR of the hexagonal constellations and examines the relationship between the PAPR and the interval of pilot signal in OFDM system. Bit Error Rate (BER) performance are evaluated with computer simulations.

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Data Availibility

The datasets generated and/or analyzed during the current study are available from the corresponding author on reasonable request. The custom code generated and/or analyzed during the current study is not publicly available due to privacy reasons.

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The authors declare that no funds, grants, or other support were received during the preparation of this manuscript.

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All authors contributed to the study conception and design. Material preparation and data collection were performed by Keigo Uehara and data analysis was performed by Keigo Uehara and Mamiko Inamori. The first draft of the manuscript was written by Keigo Uehara and all authors commented on previous versions of the manuscript. All authors read and approved the final manuscript.

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Correspondence to Keigo Uehara.

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Uehara, K., Inamori, M. Pilot-Based Compensation Scheme for Signal Distortion with Hexagonal Constellation. Wireless Pers Commun 137, 1947–1962 (2024). https://doi.org/10.1007/s11277-024-11310-0

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