Abstract: Sparse code multiple access (SCMA) is a promising non-orthogonal multiple access scheme for enabling massive connectivity in next generation wireless networks. However, current SCMA ...
Abstract: A novel CCDM-based 4-dimensional sphere packing trellis-coded modulation scheme for optical channel, CCDM-TCM-b4-32QAM is proposed, increases GMI by shaping the probability distribution and ...
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