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Sparse Code Multiple Access Over Universal Filtered Multicarrier
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DOI：10.1109/TVT.2021.3106001.png)
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摘要
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In this paper, the uplink sparse code multiple access over universal filtered multicarrier (SCMA-UFMC) is studied. In SCMA-UFMC, each sub-band of UFMC is occupied by multiple users through SCMA. Note that the even-component of frequency domain (FD) received signal suffers from neither inter-sub-band interference nor inter-sub-carrier interference while the odd-component suffers from both. The message passing algorithm (MPA) is first employed to perform multiuser detection by utilizing only the even-component. Next, to improve the performance, the odd-component is further utilized. In this improvement, reliable estimates obtained by MPA over even-component are reconstructed and cancelled from odd-component, and then only a very small number of most-unreliable user data are refined by maximum likelihood method. Moreover, the union bound of the average symbol error probability (ASEP) of maximum likelihood detection using only even-component is derived, from which it is shown that ASEP is sub-band-independent. Finally, simulation results are given to demonstrate the performance of the proposed scheme and the effectiveness of the analytical ASEP result.
Keyword:
Multiuser detection
Receiving antennas
Interference
Covariance matrices
OFDM
Maximum likelihood estimation
Maximum likelihood detection
Sparse code multiple access
universal filtered multicarrier
message propagation algorithm
union bound
multiuser detection
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IF:
7.1
论文数:
1.8W
被引数:
6.6W
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