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A New Framework for Non-orthogonal Multiple Access Based on Generalized Energy Spreading Transform

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Abstract

With the increasing needs of high data rate communication, spectrally more efficient communication schemes are desired. In multiuser communication context, conventional orthogonal multiple access (OMA) schemes suffer from spectral efficiency loss by fundamental information theoretics. Non-orthogonal multiple access (NOMA) schemes are more appropriate. In this paper, we propose a new NOMA system based on generalized energy spreading transform (GEST). We give the basic system structure and compare it with some existing NOMA systems. It is interesting that the proposed GEST-MA can be viewed as a generalization of several existing NOMA systems. Analysis and simulations show that GEST-MA is more flexible than current NOMA systems and is capable of achieving the potential diversity gain without sacrificing the spectral efficiency. Those properties make it a strong candidate for the next generation mobile communication systems.

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Notes

  1. In general one can allocate different \({\mathbf {G}}_k\) to different users.

  2. In IDMA, modulation is done after interleaving, but it can actually be shifted before spreading just as other NOMA systems.

  3. In fact, DoCoMo-NOMA only considers the case in which \(J=1\) and thus no interleaving is involved. However, \(J\ne 1\) with interleaving does not change the underlining principles of the system.

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Authors and Affiliations

  1. National Mobile Communications Research Lab., Southeast University, Nanjing, 210096, China

    Jian Dang, Zaichen Zhang & Liang Wu

Authors
  1. Jian Dang
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  2. Zaichen Zhang
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  3. Liang Wu
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Corresponding author

Correspondence to Zaichen Zhang.

Additional information

This work is supported by NSFC project (No. 61223001), 863 project (No. 2013AA013601), and Jiangsu NSF project (No. BK20140646).

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Dang, J., Zhang, Z. & Wu, L. A New Framework for Non-orthogonal Multiple Access Based on Generalized Energy Spreading Transform. Wireless Pers Commun 91, 847–860 (2016). https://doi.org/10.1007/s11277-016-3500-9

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  • DOI: https://doi.org/10.1007/s11277-016-3500-9

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