M. Cheng, W. Lin and T. Matsumoto, "Down-Link NOMA With Successive Refinement for Binary Symmetric Source Transmission," in IEEE Transactions on Communications, vol. 68, no. 12, pp. 7927-7937, Dec. 2020, doi: 10.1109/TCOMM.2020.3022400
Down-link NOMA with successive refinement for binary symmetric source transmission
|Author:||Cheng, Meng1; Lin, Wensheng2; Matsumoto, Tad1,3|
1School of Information Science, Japan Advanced Institute of Science and Technology (JAIST), Nomi, Ishikawa, 923-1292, Japan
2School of Electronics and Information, Northwestern Polytechnical University, Xi’an, Shaanxi, 710072, China
3Center for Wireless Communications, University of Oulu, 90014 Oulu, Finland
|Online Access:||PDF Full Text (PDF, 0.9 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe202101222352
Institute of Electrical and Electronics Engineers,
|Publish Date:|| 2021-01-22
This paper focuses on a lossy transmission of binary symmetric source (BSS) with down-link non-orthogonal multiple access (DL-NOMA). The transmitted binary sequences are lossy-compressed descriptions of the same BSS, which are overlapped in a specified signal format, corresponding to the receivers with pre-determined distortion requirements. Despite a higher spectrum efficiency achieved by DL-NOMA, redundancy may still remain if the overlapped descriptions are correlated. In this work, a system combining DL-NOMA and successive refinement, referred to as DN-SR, is proposed. Specifically, instead of re-constructing the source by a single description, the receiver can achieve a low distortion by first recovering the basic description, and then refining it with the help of another refinement description. If the two descriptions are made independent, transmission efficiency of the conventional DL-NOMA can be further improved. As the main contribution, this paper derives the outage probability of DN-SR in closed-form, assuming block Rayleigh fading channels. The advantage of DN-SR is numerically studied in terms of the system outage probability, compared to both the conventional DL-NOMA, and a modified DL-NOMA which exploits the correlation between descriptions, referred to as DN-CE. Finally, the optimal power allocation to the two descriptions is investigated for DN-SR, aiming to minimize the system outage probability.
IEEE transactions on communications
|Pages:||7927 - 7937|
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
213 Electronic, automation and communications engineering, electronics
This work was supported by Hitachi, Ltd. The associate editor coordinating the review of this article and approving it for publication was A. Cohen.
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