融合通用滤波多载波的非正交多址接入技术

Non-orthogonal Multiple Access Technology Combined with Universal Filtered Multi-carrier

典型的非正交多址接入技术(Non-orthogonal Multiple Access,NOMA)有稀疏码分(Sparse Code Multiple Access,SCMA)、多用户共享(Multi-user Shared Access,MUSA)、图样分割(Pattern Division Multiple Access,PDMA)等。为了研究这三种典型的NOMA技术与通用滤波多载波复用技术(Universal Filtered Multi-carrier,UFMC)技术结合后的性能,将三种典型的NOMA与UFMC结合,然后分析比较了它们的误码率性能,通过仿真对比得出UFMC-SCMA系统相比其他两种结合系统具有更好的系统性能。为了更进一步验证UFMC-SCMA系统的优点,还将其与热门的OFDM-SCMA系统进行对比。研究结果表明,由于UFMC-SCMA系统具有码本的稀疏性以及近似最优的信息传递算法(Message Passing Algorithm,MPA)检测方案,并采用子频带滤波,有效降低了误码率并提高了频谱效率,因而其具有较好的系统性能。

Typical non-orthogonal multiple access(NOMA)technologies include sparse code multiple access(SCMA),multi-user shared access(MUSA)and pattern division multiple access(PDMA)technology,etc.To research the performance of three typical NOMA technologies combined with universal filtered multi-carrier(UFMC)technology,this paper firstly combines the three typical NOMA technologies with UFMC,and compares their bit error rate(BER)performances.Furthermore,in order to verify the advantages of the UFMC-SCMA system,it also compares the BER and spectrum efficiency of the UFMC-SCMA system with the OFDM-SCMA system respectively.Simulation results show that UFMC-SCMA has better system performance due to the sparsity of the codebook of UFMC-SCMA system and the approximate optimal message passing algorithm(MPA)detection algorithm,and also because sub-band filtering is used,the BER is reduced effectively and the spectral efficiency is improved.