.png){kind=icon}
返回
Sub-Graph BasedJoint Sparse Graph for Sparse Code Multiple Access Systems
.png){kind=icon}
OA
AI
DOI：10.1109/ACCESS.2018.2828126.png)
.png){kind=icon}
.png){kind=icon}
分享.png){kind=icon}
收藏
摘要
En 中文
Sparse code multiple access (SCMA) is a promising air interface candidate technique for next-generation mobile networks, especially for massive machine-type communications. In this paper, we design a low-density parity-check (LDPC) coded SCMA detector by combining the sparse graphs of LDPC and SCMA into one joint sparse graph (JSG). In our proposed scheme, the SCMA sparse graph defined by small size indicator matrix is utilized to construct the JSG, which is termed as sub-graph-based JSG of SCMA (SG-JSG-SCMA). In this paper, we first study the binary-LDPC coded SG-JSG-SCMA system. To combine the SCMA variable node and LDPC variable node into one joint variable node, a nonbinary LDPC (NB-LDPC) coded SG-JSG-SCMA is also proposed. Furthermore, to reduce the complexity of NB-LDPC coded SG-JSG-SCMA, a joint trellis representation (JTR) is introduced to represent the search space of NB-LDPC coded SG-JSG-SCMA. Based on JTR, a low complexity joint trellis-based detection and decoding algorithm is proposed to reduce the computational complexity of the NB-LDPC coded SG-JSG-SCMA system. According to the simulation results, SG-JSG-SCMA brings significant performance improvement compare with the conventional receiver using the disjoint approach, and it can also outperform a turbo-structured receiver with comparable complexity. Moreover, the joint approach also has advantages in terms of processing latency compare with the turbo approaches.
Keyword:
5G
SCMA
LDPC
joint trellis representation
joint receiver
multiuser channels
AI总结
对已上传原文的论文进行重点信息的提取，主要内容包括：简要概述、研究摘要、背景介绍、关键亮点、图文解析、展望与总结。
期刊
IF:
3.6
论文数:
9.8W
被引数:
29.4W
机构
引用论文
Three-dimensional nanofabrication via ultrafast laser patterning and kinetically regulated material assembly通过超快激光图案化和动力学调节的材料组装进行三维纳米加工.png)
Science
OAAI
ScienceIF0
OAAI分享收藏Cooperative Non-orthogonal Multiple Access With Simultaneous Wireless Information and Power TransferOAAI
OAAI分享收藏Learning curve analysis of transvaginal natural orifice transluminal endoscopic hysterectomyBMC SurgeryOAAI
BMC SurgeryIF0
OAAI分享收藏分享收藏
查看更多内容