面向5G的非正交多址接入技术
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摘要
在频谱资源受限的情况下,非正交多址接入(non-orthogonal multiple access,NOMA)技术由于其良好的过载性能而受到广泛关注。首先,提出了基于复杂度受限的NOMA理论设计模型;接着,对目前主流的NOMA技术方案进行了研究分析,并针对每种方案给出了其设计原理;进一步,设计了基于期望值传播(expectationpropagation,EP)的低复杂度接收机;最后,通过仿真比较了NOMA与传统正交多址接入(orthogonal multiple access,OMA)技术的性能。结果表明,NOMA较传统的OMA技术能够显著提升系统容量和误码率(block error rate,BLER)性能。
With the unprecedented increase of mobile data traffic brought by the wide proliferation of smart phones and tablet computers, the non-orthogonal multiple access(NOMA) has attained great attention due to its overloading capability in the case of limited spectrum resources. Firstly, the complexity-constrained NOMA design principle was proposed. Then, a comprehensive study of key NOMA schemes was conducted, in which the theory of each scheme was provided. Next, the low complexity expectation propagation(EP) based detectors were designed. Finally, the performance of NOMA and the conventional orthogonal multiple access(OMA) was compared via simulations. The simulation results illustrate that the NOMA has superior capacity and block error rate(BLER) than the conventional OMA.
With the unprecedented increase of mobile data traffic brought by the wide proliferation of smart phones and tablet computers, the non-orthogonal multiple access(NOMA) has attained great attention due to its overloading capability in the case of limited spectrum resources. Firstly, the complexity-constrained NOMA design principle was proposed. Then, a comprehensive study of key NOMA schemes was conducted, in which the theory of each scheme was provided. Next, the low complexity expectation propagation(EP) based detectors were designed. Finally, the performance of NOMA and the conventional orthogonal multiple access(OMA) was compared via simulations. The simulation results illustrate that the NOMA has superior capacity and block error rate(BLER) than the conventional OMA.
引文
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[2]DAI X,ZHANG Z,BAI B,et al.Pattern division multiple access:anew multiple access technology for 5G[J].IEEE Wireless Communications,2018,25(2):54-60.
[3]DAI L,WANG B,YUAN Y,et al.Non-orthogonal multiple access for 5G:solutions,challenges,opportunities,and future research trends[J].IEEE Communications Magazine,2015,53(9):74-81.
[4]WANG P,XIAO J,LI P.Comparison of orthogonal and non-orthogonal approaches to future wireless cellular systems[J].IEEE Vehicular Technology Magazine,2006,1(3):4-11.
[5]RAZAVI R,DIANATI M,IMRAN M A.Non-orthogonal multiple access(NOMA)for future radio access[M].Heidelberg:Springer International Publishing,2017.
[6]NIKOPOUR H,BALIGH H.Sparse code multiple access[C]//IEEE International Symposium on Personal,Indoor and Mobile Radio Communications(PIMRC),Sep 8-9,2013,London,UK.Piscataway:IEEE Press,2013.
[7]YUAN Z,YU G,LI W,et al.Multi-user shared access for Internet of Things[C]//IEEE Vehicular Technology Conference,May 15-18,2016,Nanjing,China.Piscataway:IEEE Press,2016.
[8]LI P,LIU L,WU K,et al.Interleave-division multiple-access[J].IEEE Transactions on Wireless Communications,2006,5(4):938-947.
[9]Qualcomm Incorporated.RSMA:RAN1#85.May:R1-164688[R].2016.
[10]WU S,KUANG L,NI Z,et al.Low-complexity iterative detection for large-scale multiuser MIMO-OFDM systems using approximate message passing[J].IEEE Journal of Selected Topics in Signal Processing,2014,8(5):902-915.
[11]KSCHISCHANG F R,FREY B J.Iterative decoding of compound codes by probability propagation in graphical models[J].IEEE Journal on Selected Areas in Communications,1998,16(2):219-230.