Impact of Multilevel Modulation on Performance of NOMA Weak Channel User 


Vol. 44,  No. 9, pp. 1674-1677, Sep.  2019
10.7840/kics.2019.44.9.1674


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  Abstract

New multiple access technique, non-orthogonal multiple access (NOMA), has been proposed recently for increasing the system capacity. Moreover, to increase the capacity, naturally, we consider the multilevel modulation to NOMA. In this paper, the impact of the multilevel modulation, such as 4-ary pulse amplitude modulation (4PAM), on the performance for the NOMA weak channel user is presented. The analysis of this paper is complete in that the performance is analyzed for the entire range of the power allocation factor. It is shown how much the NOMA performance with 4PAM degrades, compared to the orthogonal multiple access (OMA). In result, there are gain and loss; the gain is that two users can use the same channel resources, i.e., the system capacity becomes double and the loss is the performance degradation, which is shown analytically in this paper.

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  Cite this article

[IEEE Style]

K. Chung, "Impact of Multilevel Modulation on Performance of NOMA Weak Channel User," The Journal of Korean Institute of Communications and Information Sciences, vol. 44, no. 9, pp. 1674-1677, 2019. DOI: 10.7840/kics.2019.44.9.1674.

[ACM Style]

Kyuhyuk Chung. 2019. Impact of Multilevel Modulation on Performance of NOMA Weak Channel User. The Journal of Korean Institute of Communications and Information Sciences, 44, 9, (2019), 1674-1677. DOI: 10.7840/kics.2019.44.9.1674.

[KICS Style]

Kyuhyuk Chung, "Impact of Multilevel Modulation on Performance of NOMA Weak Channel User," The Journal of Korean Institute of Communications and Information Sciences, vol. 44, no. 9, pp. 1674-1677, 9. 2019. (https://doi.org/10.7840/kics.2019.44.9.1674)

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pISSN : 1226 - 4717
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