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Sparse code multiple access (SCMA) is a novel air-interface technology proposed for the fifth generation (5G) mobile communication system. SCMA aims for energy saving, low latency and massive connectivity to satisfy 5G demand. SCMA grant-free transmission has been proposed to ensure low latency and massive connectivity. In this paper, the connection and packets drop performance of SCMA and OFDMA through...
Sparse code multiple access (SCMA) is a novel kind of air interface technology which can dramatically improve spectral efficiency of wireless radio access. Different from conventional CDMA and OFDMA, SCMA achieves the non-orthogonal multiple access of frequency domain. On the other hand, Multiple-Input Multiple-Output (MIMO) can make full use of spatial-domain resource to improve system performance...
Sparse Code Multiple Access (SCMA) is a recently designed spreading technology in which QAM symbols are mapped to different OFDMA tones. The codebook based mapping can be regarded as a spreading encoding process, where the shaping gain helps promote spectral efficiency and enhance system performance. Based on the SCMA encoding scheme, this paper proposes a joint Multi-user detection (MUD) and channel...
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