Salem, Abdelhamid;
Tong, Xiao;
Li, Ang;
Masouros, Christos;
(2024)
NOMA Made Practical: Removing the Receive SIC Processing Through Interference Exploitation.
IEEE Open Journal of the Communications Society
pp. 2723-2734.
10.1109/ojcoms.2024.3393028.
(In press).
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Abstract
Non-orthogonal multiple access (NOMA) is a powerful transmission technique that enhances the spectral efficiency of communication links, and is being investigated for 5G standards and beyond. A major drawback of NOMA is the need to apply successive interference cancellation (SIC) at the receiver on a symbol-by-symbol basis, which limits its practicality. To circumvent this, in this paper a novel constructive multiple access (CoMA) scheme is proposed and investigated. CoMA aligns the superimposed signals to the different users constructively to the signal of interest. Since the superimposed signal aligns with the data signal, there is no need to remove it at the receiver using SIC. Accordingly, SIC component can be removed at the receiver side. In this regard and in order to provide a comprehensive investigation and comparison, different optimization problems for user paring NOMA multiple-input-single-output (MISO) systems are considered. Firstly, an optimal precoder to minimize the total transmission power for CoMA subject to a quality-of-service constraint is obtained, and compared to conventional NOMA. Then, a precoder that minimizes the CoMA symbol error rate (SER) subject to power constraint is investigated. Further, the computational complexity of CoMA is considered and compared with conventional NOMA scheme in terms of total number of complex operations. The results in this paper prove the superiority of the proposed CoMA scheme over the conventional NOMA technique, and demonstrate that CoMA is an attractive solution for user paring NOMA MISO systems with low number of BS antennas, while circumventing the receive SIC complexity.
| Type: | Article |
|---|---|
| Title: | NOMA Made Practical: Removing the Receive SIC Processing Through Interference Exploitation |
| Open access status: | An open access version is available from UCL Discovery |
| DOI: | 10.1109/ojcoms.2024.3393028 |
| Publisher version: | http://dx.doi.org/10.1109/ojcoms.2024.3393028 |
| Language: | English |
| Additional information: | IEEE is not the copyright holder of this material. Please follow the instructions via https://creativecommons.org/licenses/by/4.0/ to obtain full-text articles and stipulations in the API documentation. |
| Keywords: | NOMA, Precoding, Complexity theory, Symbols, Interference cancellation, Vectors, MISO communication |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10192206 |
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