4 papers
On the Design of Variable Modulation and Adaptive Modulation for Uplink Sparse Code Multiple Access
Qu Luo, Pei Xiao, Gaojie Chen +1
Sparse code multiple access (SCMA) is a promising non-orthogonal multiple access scheme for enabling massive connectivity in next generation wireless networks. However, current SCM…
Advanced Nonlinear SCMA Codebook Design Based on Lattice Constellations
Qu Luo, Jing Zhu, Gaojie Chen +2
The design of efficient sparse codebooks in sparse code multiple access (SCMA) system have attracted tremendous research attention in the past few years. This paper proposes a nove…
A Progressive Codebook Optimization Scheme for Sparse Code Multiple Access in Downlink Channels
Tuofeng Lei, Qu Luo, Shuyan Ni +3
Sparse code multiple access (SCMA) is a promising technique for enabling massive connectivity and high spectrum efficiency in future machine-type communication networks. However, i…
Enhancing Signal Space Diversity for SCMA Over Rayleigh Fading Channels
Qu Luo, Zilong Liu, Gaojie Chen +1
Sparse code multiple access (SCMA) is a promising technique for the enabling of massive connectivity in future machine-type communication networks, but it suffers from a limited di…