Back to Search
Start Over
Efficient Sparse Code Multiple Access Decoder Based on Deterministic Message Passing Algorithm.
- Source :
- IEEE Transactions on Vehicular Technology; Apr2020, Vol. 69 Issue 4, p3562-3574, 13p
- Publication Year :
- 2020
-
Abstract
- Being an effective non-orthogonal multiple access (NOMA) technique, sparse code multiple access (SCMA) is promising for future wireless communication. Compared with orthogonal techniques, SCMA enjoys higher overloading tolerance and lower complexity because of its sparsity. In this paper, based on deterministic message passing algorithm (DMPA), algorithmic simplifications such as domain changing and probability approximation are applied for SCMA decoding. Early termination, adaptive decoding, and initial noise reduction are also employed for faster convergence and better performance. Numerical results show that the proposed optimizations benefit both decoding complexity and speed. Furthermore, efficient hardware architectures based on folding and retiming are proposed. VLSI implementation is also given in this paper. Comparison with the state-of-the-art have shown the proposed decoder's advantages in both latency and throughput (multi-Gbps). [ABSTRACT FROM AUTHOR]
- Subjects :
- GRAPH algorithms
ALGORITHMS
NOISE control
WIRELESS communications
Subjects
Details
- Language :
- English
- ISSN :
- 00189545
- Volume :
- 69
- Issue :
- 4
- Database :
- Complementary Index
- Journal :
- IEEE Transactions on Vehicular Technology
- Publication Type :
- Academic Journal
- Accession number :
- 143317272
- Full Text :
- https://doi.org/10.1109/TVT.2020.2969020