Joint Design of Polar Coding and Physical Network Coding for Two−User Downlink Non−Orthogonal Multiple Access
In this paper, we propose a joint polar coding and physical network coding (PNC) for two−user downlink non−orthogonal multiple access (PN−DNOMA) channels, since the successive–interference–cancellation–aided polar decoding cannot be optimal for finite blocklength transmissions. In the proposed schem...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-01-01
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| Series: | Entropy |
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| Online Access: | https://www.mdpi.com/1099-4300/25/2/233 |
| _version_ | 1811153829442355200 |
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| author | Zhaopeng Xie Pingping Chen Yong Li |
| author_facet | Zhaopeng Xie Pingping Chen Yong Li |
| author_sort | Zhaopeng Xie |
| collection | DOAJ |
| description | In this paper, we propose a joint polar coding and physical network coding (PNC) for two−user downlink non−orthogonal multiple access (PN−DNOMA) channels, since the successive–interference–cancellation–aided polar decoding cannot be optimal for finite blocklength transmissions. In the proposed scheme, we first constructed the XORed message of two user messages. Then, the XORed message was superimposed with the message of the weak User 2 for broadcast. By doing so, we can utilize the PNC mapping rule and polar decoding to directly recover the message of User 1, while at User 2, we equivalently constructed a long−length polar decoder to obtain its user message. The channel polarization and decoding performance can be greatly improved for both users. Moreover, we optimized the power allocation of the two users with their channel conditions by considering the user fairness and the performance. The simulation results showed that the proposed PN−DNOMA can achieve performance gains of about 0.4−0.7 dB over the conventional schemes in two−user downlink NOMA systems. |
| first_indexed | 2024-03-11T08:52:16Z |
| format | Article |
| id | doaj.art-d904230cc7d6468b914e5d6a61a1ad29 |
| institution | Directory Open Access Journal |
| issn | 1099-4300 |
| language | English |
| last_indexed | 2024-03-11T08:52:16Z |
| publishDate | 2023-01-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Entropy |
| spelling | doaj.art-d904230cc7d6468b914e5d6a61a1ad292023-11-16T20:22:40ZengMDPI AGEntropy1099-43002023-01-0125223310.3390/e25020233Joint Design of Polar Coding and Physical Network Coding for Two−User Downlink Non−Orthogonal Multiple AccessZhaopeng Xie0Pingping Chen1Yong Li2College of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaCollege of Physics and Information Engineering, Fuzhou University, Fuzhou 350108, ChinaCollege of Computer Science, Chongqing University, Chongqing 400044, ChinaIn this paper, we propose a joint polar coding and physical network coding (PNC) for two−user downlink non−orthogonal multiple access (PN−DNOMA) channels, since the successive–interference–cancellation–aided polar decoding cannot be optimal for finite blocklength transmissions. In the proposed scheme, we first constructed the XORed message of two user messages. Then, the XORed message was superimposed with the message of the weak User 2 for broadcast. By doing so, we can utilize the PNC mapping rule and polar decoding to directly recover the message of User 1, while at User 2, we equivalently constructed a long−length polar decoder to obtain its user message. The channel polarization and decoding performance can be greatly improved for both users. Moreover, we optimized the power allocation of the two users with their channel conditions by considering the user fairness and the performance. The simulation results showed that the proposed PN−DNOMA can achieve performance gains of about 0.4−0.7 dB over the conventional schemes in two−user downlink NOMA systems.https://www.mdpi.com/1099-4300/25/2/233polar codetwo-user downlink non-orthogonal multiple access channelsphysical layer network coding |
| spellingShingle | Zhaopeng Xie Pingping Chen Yong Li Joint Design of Polar Coding and Physical Network Coding for Two−User Downlink Non−Orthogonal Multiple Access Entropy polar code two-user downlink non-orthogonal multiple access channels physical layer network coding |
| title | Joint Design of Polar Coding and Physical Network Coding for Two−User Downlink Non−Orthogonal Multiple Access |
| title_full | Joint Design of Polar Coding and Physical Network Coding for Two−User Downlink Non−Orthogonal Multiple Access |
| title_fullStr | Joint Design of Polar Coding and Physical Network Coding for Two−User Downlink Non−Orthogonal Multiple Access |
| title_full_unstemmed | Joint Design of Polar Coding and Physical Network Coding for Two−User Downlink Non−Orthogonal Multiple Access |
| title_short | Joint Design of Polar Coding and Physical Network Coding for Two−User Downlink Non−Orthogonal Multiple Access |
| title_sort | joint design of polar coding and physical network coding for two user downlink non orthogonal multiple access |
| topic | polar code two-user downlink non-orthogonal multiple access channels physical layer network coding |
| url | https://www.mdpi.com/1099-4300/25/2/233 |
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