| Summary: | 碩士 === 元智大學 === 通訊工程學系 === 106 === This thesis focuses on both uplink and downlink performance analyses of SCMA with a relay. Chapter 1 introduces the motivation. Chapter 2 introduces major multiple access schemes including frequency division multiple access, time division multiple access, code division multiple access , low density signature-code division multiple access and sparse code multiple access, where sparse code multiple access is adopted for 6 users and 4 resource blocksin which each user has his own signal constellation codebook . In Chapter 3, we study both the uplink and downlink performance analyses of sparse code multiple access with a relay. In the meanwhile, we calculate the PAPR for the downlink. The conclusion is given in Chapter 4.
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