In the 5th generation of mobile cellular systems, non-orthogonal multiple access (NOMA) is being considered as a potential candidate for uplink (UL) multiple access (MA) in addition to the basic orthogonal multiple access scheme in order to support various usage scenarios including small packet transmissions, support of a massive number of users , and low latency and high reliability services. In this paper, two simple multiple access schemes, low code rate spreading (LCRS) and short-sequence-based spreading multiple access (SSMA), with corresponding use of advanced receivers, are analyzed, demonstrating system capacity improvements compared to orthogonal multiple access (OMA) scheme. The robustness and gain of non-orthogonal multiple access scheme over orthogonal approaches are maximized when the packet size is small and suitable code rate is guaranteed.
Non-Orthogonal Multiple Access with Low Code Rate Spreading and Short Sequence Based Spreading
2017-09-01
392055 byte
Conference paper
Electronic Resource
English
British Library Online Contents | 2004
|British Library Online Contents | 2004
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