A Novel Scheme for the Construction of the SCMA Codebook
As a code-domain non-orthogonal multiple access technique, sparse code multiple access (SCMA) is considered as a promising technique for future wireless Internet of Things (IoT) networks. The minimum Euclidean distance (MED) and minimum product distance (MPD) have been highlighted as the key perform...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
IEEE
2022-01-01
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| Series: | IEEE Access |
| Subjects: | |
| Online Access: | https://ieeexplore.ieee.org/document/9895245/ |
| _version_ | 1817980808302952448 |
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| author | Tuofeng Lei Shuyan Ni Naiping Cheng Shimiao Chen Xin Song |
| author_facet | Tuofeng Lei Shuyan Ni Naiping Cheng Shimiao Chen Xin Song |
| author_sort | Tuofeng Lei |
| collection | DOAJ |
| description | As a code-domain non-orthogonal multiple access technique, sparse code multiple access (SCMA) is considered as a promising technique for future wireless Internet of Things (IoT) networks. The minimum Euclidean distance (MED) and minimum product distance (MPD) have been highlighted as the key performance indicators of the codebooks in additive gaussian white noise (AWGN) and downlink Rayleigh channels respectively. In this paper, based on the mother codebook, a novel codebook design scheme is proposed to achieve better error performance in both AWGN and downlink Rayleigh channel. The problem of constructing the mother codebook is considered as the quadratic assignment problem (QAP), where the Tabu searching algorithm is employed to reduce the complexity of searching for the best permutation result. Then, the rotation matrix is adopted to find the best degrees for the generation of the constellation group, and two algorithms are proposed to assign the obtained constellation in factor graph matrix. Taking the degree optimization and the constellation assignment into joint consideration, an improved unified optimization is further explored to maximize the MED of each user. Besides, a novel polarized modulation scheme is proposed, which places the symbols in the three dimensional (3D) stokes parameters to improve the performance of the system. Finally, simulation results are provided to show the performance of the proposed codebooks, and the comparisons of symbol error performance (SER) in different codebooks are also discussed in detail. |
| first_indexed | 2024-04-13T22:57:52Z |
| format | Article |
| id | doaj.art-b264e923cd4d48009e17b5890b75d919 |
| institution | Directory Open Access Journal |
| issn | 2169-3536 |
| language | English |
| last_indexed | 2024-04-13T22:57:52Z |
| publishDate | 2022-01-01 |
| publisher | IEEE |
| record_format | Article |
| series | IEEE Access |
| spelling | doaj.art-b264e923cd4d48009e17b5890b75d9192022-12-22T02:25:57ZengIEEEIEEE Access2169-35362022-01-011010098710099810.1109/ACCESS.2022.32078989895245A Novel Scheme for the Construction of the SCMA CodebookTuofeng Lei0https://orcid.org/0000-0002-8199-8276Shuyan Ni1Naiping Cheng2Shimiao Chen3Xin Song4Department of Electronic and Optical Engineering, Space Engineering University, Beijing, ChinaDepartment of Electronic and Optical Engineering, Space Engineering University, Beijing, ChinaDepartment of Electronic and Optical Engineering, Space Engineering University, Beijing, ChinaDepartment of Electronic and Optical Engineering, Space Engineering University, Beijing, ChinaDepartment of Electronic and Optical Engineering, Space Engineering University, Beijing, ChinaAs a code-domain non-orthogonal multiple access technique, sparse code multiple access (SCMA) is considered as a promising technique for future wireless Internet of Things (IoT) networks. The minimum Euclidean distance (MED) and minimum product distance (MPD) have been highlighted as the key performance indicators of the codebooks in additive gaussian white noise (AWGN) and downlink Rayleigh channels respectively. In this paper, based on the mother codebook, a novel codebook design scheme is proposed to achieve better error performance in both AWGN and downlink Rayleigh channel. The problem of constructing the mother codebook is considered as the quadratic assignment problem (QAP), where the Tabu searching algorithm is employed to reduce the complexity of searching for the best permutation result. Then, the rotation matrix is adopted to find the best degrees for the generation of the constellation group, and two algorithms are proposed to assign the obtained constellation in factor graph matrix. Taking the degree optimization and the constellation assignment into joint consideration, an improved unified optimization is further explored to maximize the MED of each user. Besides, a novel polarized modulation scheme is proposed, which places the symbols in the three dimensional (3D) stokes parameters to improve the performance of the system. Finally, simulation results are provided to show the performance of the proposed codebooks, and the comparisons of symbol error performance (SER) in different codebooks are also discussed in detail.https://ieeexplore.ieee.org/document/9895245/Sparse code multiple access (SCMA)codebook designminimum Euclidean distance (MED)minimum product distance (MPD)three dimensional SCMA codebooks |
| spellingShingle | Tuofeng Lei Shuyan Ni Naiping Cheng Shimiao Chen Xin Song A Novel Scheme for the Construction of the SCMA Codebook IEEE Access Sparse code multiple access (SCMA) codebook design minimum Euclidean distance (MED) minimum product distance (MPD) three dimensional SCMA codebooks |
| title | A Novel Scheme for the Construction of the SCMA Codebook |
| title_full | A Novel Scheme for the Construction of the SCMA Codebook |
| title_fullStr | A Novel Scheme for the Construction of the SCMA Codebook |
| title_full_unstemmed | A Novel Scheme for the Construction of the SCMA Codebook |
| title_short | A Novel Scheme for the Construction of the SCMA Codebook |
| title_sort | novel scheme for the construction of the scma codebook |
| topic | Sparse code multiple access (SCMA) codebook design minimum Euclidean distance (MED) minimum product distance (MPD) three dimensional SCMA codebooks |
| url | https://ieeexplore.ieee.org/document/9895245/ |
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