抄録
Non-orthogonal multiple access improves spectral efficiency through sharing the same frequency resource with multiple wireless terminals. In previous researches, it has been shown that a log likelihood ratio (LLR) calculated from a signal on the sharing spectrum should be masked to zero if the power of an interference signal is stronger than that of a desired signal. This implies that the spectrum is not shared by the terminal receiving the weaker signal. In this paper, a spectrum sharing scheme with the use of interference cancelation and LLR calculation on the basis of the probability density function of residual interference is proposed. The residual interference remains owing to a channel estimation error and the LLR calculation takes that into account. Numerical results obtained thorough computer simulation show that the proposed scheme improves the performance by 1 dB with ideal channel estimation and 2 dB with channel estimation error at the BER of 10-4 as compared to that with a conventional LLR calculation scheme.
| 元の言語 | English |
|---|---|
| ホスト出版物のタイトル | IEEE Vehicular Technology Conference |
| 出版者 | Institute of Electrical and Electronics Engineers Inc. |
| ISBN（印刷物） | 9781479944491, 9781479944491 |
| DOI | |
| 出版物ステータス | Published - 2014 11 24 |
| イベント | 80th IEEE Vehicular Technology Conference, VTC 2014-Fall - Vancouver, Canada 継続期間: 2014 9 14 → 2014 9 17 |
Other
| Other | 80th IEEE Vehicular Technology Conference, VTC 2014-Fall |
|---|---|
| 国 | Canada |
| 市 | Vancouver |
| 期間 | 14/9/14 → 14/9/17 |
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ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Computer Science Applications
- Applied Mathematics
これを引用
LLR calculation based on interference cancelation with channel estimation error for non-orthogonal multiple access. / Chida, Yuji; Sanada, Yukitoshi.
IEEE Vehicular Technology Conference. Institute of Electrical and Electronics Engineers Inc., 2014. 6966038.研究成果: Conference contribution
}
TY - GEN
T1 - LLR calculation based on interference cancelation with channel estimation error for non-orthogonal multiple access
AU - Chida, Yuji
AU - Sanada, Yukitoshi
PY - 2014/11/24
Y1 - 2014/11/24
N2 - Non-orthogonal multiple access improves spectral efficiency through sharing the same frequency resource with multiple wireless terminals. In previous researches, it has been shown that a log likelihood ratio (LLR) calculated from a signal on the sharing spectrum should be masked to zero if the power of an interference signal is stronger than that of a desired signal. This implies that the spectrum is not shared by the terminal receiving the weaker signal. In this paper, a spectrum sharing scheme with the use of interference cancelation and LLR calculation on the basis of the probability density function of residual interference is proposed. The residual interference remains owing to a channel estimation error and the LLR calculation takes that into account. Numerical results obtained thorough computer simulation show that the proposed scheme improves the performance by 1 dB with ideal channel estimation and 2 dB with channel estimation error at the BER of 10-4 as compared to that with a conventional LLR calculation scheme.
AB - Non-orthogonal multiple access improves spectral efficiency through sharing the same frequency resource with multiple wireless terminals. In previous researches, it has been shown that a log likelihood ratio (LLR) calculated from a signal on the sharing spectrum should be masked to zero if the power of an interference signal is stronger than that of a desired signal. This implies that the spectrum is not shared by the terminal receiving the weaker signal. In this paper, a spectrum sharing scheme with the use of interference cancelation and LLR calculation on the basis of the probability density function of residual interference is proposed. The residual interference remains owing to a channel estimation error and the LLR calculation takes that into account. Numerical results obtained thorough computer simulation show that the proposed scheme improves the performance by 1 dB with ideal channel estimation and 2 dB with channel estimation error at the BER of 10-4 as compared to that with a conventional LLR calculation scheme.
UR - http://www.scopus.com/inward/record.url?scp=84919460246&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84919460246&partnerID=8YFLogxK
U2 - 10.1109/VTCFall.2014.6966038
DO - 10.1109/VTCFall.2014.6966038
M3 - Conference contribution
AN - SCOPUS:84919460246
SN - 9781479944491
SN - 9781479944491
BT - IEEE Vehicular Technology Conference
PB - Institute of Electrical and Electronics Engineers Inc.
ER -