Performance Analysis of a New Non-Orthogonal Multiple Access Design for Mitigating Information Loss

Sang-Wook Park, Hyoung-Do Kim, Kyung-Ho Shin, Jin-Woo Kim, Seung-Hwan Seo, Yoon-Ju Choi, Young-Hwan You, Yeon-Kug Moon and Hyoung-Kyu Song ()
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Sang-Wook Park: Department of Information and Communication Engineering, Sejong University, Seoul 05006, Republic of Korea
Hyoung-Do Kim: Department of Information and Communication Engineering, Sejong University, Seoul 05006, Republic of Korea
Kyung-Ho Shin: Department of Information and Communication Engineering, Sejong University, Seoul 05006, Republic of Korea
Jin-Woo Kim: Department of Information and Communication Engineering, Sejong University, Seoul 05006, Republic of Korea
Seung-Hwan Seo: Department of Information and Communication Engineering, Sejong University, Seoul 05006, Republic of Korea
Yoon-Ju Choi: Department of Information and Communication Engineering, Sejong University, Seoul 05006, Republic of Korea
Young-Hwan You: Department of Convergence Engineering for Intelligent Drone, Sejong University, Seoul 05006, Republic of Korea
Yeon-Kug Moon: Department of Artificial Intelligence and Data Science, Sejong University, Seoul 05006, Republic of Korea
Hyoung-Kyu Song: Department of Information and Communication Engineering, Sejong University, Seoul 05006, Republic of Korea

Mathematics, 2024, vol. 12, issue 17, 1-15

Abstract: This paper proposes a scheme that adds XOR bit operations into the encoding and decoding process of the conventional non-orthogonal multiple access (NOMA) system to alleviate performance degradation caused by the power distribution of the original signal. Because the conventional NOMA combines and sends multiple data within limited resources, it has a higher data rate than orthogonal multiple access (OMA), at the expense of error performance. However, by using the proposed scheme, both error performance and sum rate can be improved. In the proposed scheme, the transmitter sends the original data and the redundancy data in which the exclusive OR (XOR) values of the data are compressed using the superposition coding (SC) technique. After this process, the data rate of users decreases due to redundancy data, but since the original data are sent without power allocation, the data rate of users with poor channel conditions increases compared to the conventional NOMA. As a result, the error performance and sum rate of the proposed scheme are better than those of the conventional NOMA. Additionally, we derive an exact closed-form bit error rate (BER) expression for the proposed downlink NOMA design over Rayleigh fading channels.

Keywords: non-orthogonal multiple access (NOMA); eclusive OR (XOR); bit error rate (BER); sum rate; exact BER analysis (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2024
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