Abstract
Observing that employing a single codebook (CB) per user transmission block in the conventional CB-based non-orthogonal multiple access (NOMA) schemes doesn't exploit code and interference diversity and has limitations in some unfavorable channel conditions, this letter presents multiple CB-based NOMA (MC-NOMA) in which multiple CBs are employed by a user in a round robin manner. Performance of schemes such as sparse code multiple access (SCMA) and pattern division multiple access (PDMA) is improved by MC-NOMA without incurring any additional receiver complexity and loss in spectral efficiency. Furthermore, to fully exploit code and interference diversity for MC-NOMA, CBs assignment algorithm is presented.
Original language | English |
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Article number | 8957418 |
Pages (from-to) | 683-687 |
Number of pages | 5 |
Journal | IEEE Wireless Communications Letters |
Volume | 9 |
Issue number | 5 |
DOIs | |
Publication status | Published - 2020 May |
Keywords
- Non-orthogonal multiple access (NOMA)
- multiple codebook NOMA (MC-NOMA)
- pattern division multiple access (PDMA)
- sparse code multiple access (SCMA)
ASJC Scopus subject areas
- Control and Systems Engineering
- Electrical and Electronic Engineering