基于串行策略的SCMA多用户检测算法

杜洋; 董彬虹; 王显俊; 党冠斌; 高鹏宇

doi:10.11999/JEIT151259

基于串行策略的SCMA多用户检测算法

doi: 10.11999/JEIT151259

基金项目:

华为创新研究计划(YB2015040056)，国家自然科学基金(61201126)，新世纪优秀人才支持计划(NCET-11-0058)，四川省青年科技基金(2012JQ0020)，国家级重点实验室基金(150C02006)

计量
- 文章访问数: 1333
- HTML全文浏览量: 112
- PDF下载量: 1276
- 被引次数: 0
出版历程
- 收稿日期: 2015-11-09
- 修回日期: 2016-03-28
- 刊出日期: 2016-08-19

Multiuser Detection Scheme for SCMA Systems Based on Serial Strategy

Funds:

Huawei HIRP Project (YB2015040056), The National Natural Science Foundation of China (61201126), New Century Excellent Talents in University (NCET-11-0058), Sichuan Youth Science and Technology Fund (2012JQ0020), Open Research Fund of the National Laboratory (150C02006)

摘要

摘要: 稀疏码多址接入(SCMA)作为一个前景广阔的5 G无线空口技术，能够满足海量连接的需求。针对现有SCMA通信系统都是基于并行策略的消息传递算法(MPA)进行多用户检测，存在信息收敛速度不理想的问题，该文提出一种串行策略的多用户检测算法。该算法以资源节点为序，按串行方式依次进行消息更新与传递，保证更新的消息能够立即进入当前迭代过程，改善了消息传递的收敛速度，相比并行策略的多用户检测算法，降低了算法复杂度；同时，充分利用消息间相互关联的特点，融合消息传递步骤，降低了存储器的要求。理论与仿真结果表明，该算法在误比特率(BER)性能与算法复杂度之间可以达到较理想的平衡。
- 稀疏码多址接入 /
- 多用户检测 /
- 消息传递算法 /
- 串行策略
Abstract: Sparse Code Multiple Access (SCMA) is a promising air-interface technology for 5 G wireless communication networks, which can enable massive connectivity. The existing multiuser detection schemes are based on a parallel message updating for Message Passing Algorithm (MPA), thus it is not efficient in terms of convergence. In this paper, an efficient multiuser detection scheme for uplink SCMA is proposed based on serial updating of function nodes, messages. Compared to the existing detection schemes, the proposed scheme accelerates the convergence due to that the updated messages can join the belief propagation immediately in current iteration, which avoids being used in the next iteration. Furthermore, the proposed scheme can reduce the storage burden, which fuses message passing process on the basis of the relationship between messages. Numerical results show that the proposed scheme can offer a good trade-off between complexity and Bit Error Rate (BER) performance.
- Sparse Code Multiple Access (SCMA) /
- Multiuser detection /
- Message Passing Algorithm (MPA) /
- Serial updating

HTML全文

参考文献(18)

THOMPSON J, GE X, WU H C, et al. 5 G wireless communication systems: prospects and challenges[J]. IEEE Communications Magazine, 2014, 52(2): 62-64. doi: 10.1109/ MCOM.2014.6815889.

WANG P, XIAO J, and LI P. Comparison of orthogonal and nonorthogonal approaches to future wireless cellular systems [J]. IEEE Vehicular Technology Magazine, 2006, 52(3): 4-11. doi: 10.1109/MVT.2006.307294.

DAI L L, WANG B C, YUAN Y F, et al. Non-orthogonal multiple access for 5 G: solutions, challenges, opportunities, and future research trends[J]. IEEE Communications Magazine, 2015, 53(9): 74-81. doi: 10.1109/MCOM.2015. 7263349.

许耀华, 胡艳军. 基于拟生态优化算法的 CDMA 多用户检测方法[J]. 电子与信息学报, 2006, 28(11): 2111-2115.

XU Y H and HU Y J. Research of ecologic system optimization algorithms for multi-user detection in CDMA communication systems[J]. Journal of Electronics Information Technology, 2006, 28(11): 2111-2115.

王宇, 李少谦, 李乐民. 多业务蜂窝CDMA系统的干扰与容量分析[J]. 电子与信息学报, 2002, 24(12): 1785-1792.

WANG Y, LI S Q, and LI L M. Interference and capacity analysis for multi-service cellular CDMA systems[J]. Journal of Electronics Information Technology, 2002, 24(12): 1785-1792.

HOSHYAR R, WATHAN F P, and TAFAZOLLI R. Novel low-density signature for synchronous CDMA systems over AWGN channel[J]. IEEE Transactions on Signal Processing, 2008, 56(4): 1616-1626. doi: 10.1109/TSP.2007.909320.

BEEK J V D and BALIGH B M. Multiple access with low- density signatures[C]. IEEE Global Telecommunications Conference, Honolulu, USA, 2009: 1-6. doi: 10.1109/ GLOCOM.2009.5425243.

RAZAVI R, HOSHYAR R, IMRAN M A, et al. Information theoretic analysis of LDS scheme[J]. IEEE Communications Letters, 2011, 15(8): 798-800. doi: 10.1109/LCOMM.2011. 061011.102098.

NIKOPOUR H and BALIGH H. Sparse code multiple access [C]. IEEE Personal Indoor and Mobile Radio Communications, London, UK, 2013: 332-336. doi: 10.1109/ PIMRC.2013.6666156.

ZHANG S Q, XU X Q, LU L, et al. Sparse code multiple access: an energy efficient uplink approach for 5 G wireless systems[C]. IEEE Global Telecommunications Conference, Austin, USA, 2014: 4782-4787. doi: 10.1109/GLOCOM.2014. 7037563.

AU K, ZHANG L Q, NIKOPOUR H, et al. Uplink contention based SCMA for 5 G radio systems[C]. IEEE Global Telecommunications Conference Workshops, Austin, USA, 2014: 900-905. doi: 10.1109/GLOCOMW.2014.7063547.

TAHERZADEH M, NIKOPOUR H, BAYESTECH A, et al. SCMA codebook design[C]. IEEE Vehicular Technology Conference Fall, Vancouver, CAN, 2014: 14-17. doi: 10.1109/VTCFall. 2014.6966170.

WANG B, WANG K, LU Z, et al. Comparison study of non- orthogonal multiple access schemes for 5 G[C]. IEEE Broadband Multimedia Systems and Broadcasting, Ghent, BEL, 2015: 1-5. doi: 10.1109/BMSB.2015.7177186.

WU Y, ZHANG S, and CHEN Y. Iterative multiuser receiver in sparse code multiple access[C]. IEEE International Conference on Communications, London, UK, 2015: 2918-2923. doi: 10.1109/ICC.2015.7248770.

KSCHISCHANG F, FREY B, and LOELIGER H. Factor graphs and the sum-product algorithm[J]. IEEE Transactions on Information Theory, 2001, 47(2): 498-519. doi: 10.1109/ 18.910572.

MU H, MA Z, ALHAJI M, et al. A fixed low complexity message pass detector for up-link SCMA system[J]. IEEE Wireless Communications Letters, 2015, 4(6): 585-588. doi: 10.1109/LWC.2015.2469668.

施引文献

资源附件(0)

访问统计