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Asynchronous Layered Modulation for High Spectral Efficiency Transmission with Lower Sensitivity to Phase Errors

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Abstract

In this paper, an asynchronous double layered modulation scheme is proposed to achieve high spectral efficiency transmission but has lower sensitivity to phase errors. By intentionally introducing a delay offset to the transmitted signals at each layer, the asynchronous double layered format can use lower level quadrature amplitude modulation (QAM) to achieve the same spectral efficiency as the conventional high level QAM modulation. The error probability performance of the asynchronous double layered format is analyzed in the presence of phase errors and the symbol error rate and the bit error rate are derived in the closed-form expression. Both the theoretical analysis and the simulation results show that the asynchronous layered format can achieve the same spectral efficiency as the conventional high level QAM modulation while has lower sensitivity to the phase errors.

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Authors and Affiliations

  1. National Key Laboratory of Science and Technology on Communications, University of Electronic Science and Technology of China (UESTC), Chengdu, China

    Shihai Shao, Donglin Liu & Youxi Tang

Authors
  1. Shihai Shao
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  2. Donglin Liu
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  3. Youxi Tang
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Correspondence to Shihai Shao.

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Shao, S., Liu, D. & Tang, Y. Asynchronous Layered Modulation for High Spectral Efficiency Transmission with Lower Sensitivity to Phase Errors. Wireless Pers Commun 79, 1223–1234 (2014). https://doi.org/10.1007/s11277-014-1926-5

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  • DOI: https://doi.org/10.1007/s11277-014-1926-5

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