… mal modified sphere decoding (MSD) detection scheme for sparse code multiple access (SCMA)…
In [3], a hybrid of list sphere decoding (SD) and MPA is used to reduce the complexity of …

… (SCMA) has been proposed to obtain high capacity and support massive connections. Due
to the sparse feature of codewords, SCMA … novel MPA based on sphere decoding, called SD-…

… for SCMA: sphere decoding for SCMA (SD-SCMA) and generalized SD-SCMA (GSD-SCMA). …
To enable the codeword enumeration of l1 new users, we utilize the function F1(M,l1) to …

… We consider a general SCMA system with J users (layers) spreading over K shared
orthogonal resources. The channel encoder encodes the binary data of user j with coding rate Rj, …

… detection method for SCMA based on sphere decoding. The … vector, which enables the
sphere decoder to quickly find the … complexity sphere decoding algorithm for SCMA systems …

… the sphere decoding (SD) [12] to ensure the optimal performance. Hence, on the basis of
sparsity features in the grant-free SCMA … by SCMA with a large number of users, which enables …

… access (NOMA) scheme to enable future massive machine-type … limits of SCMA, we present
a survey of advanced decoding … this is known as sphere decoded MPA (SD-MPA) [78]–[81]. …

… the coded SCMA system, we propose a list sphere decoding (… soft decisions to the
corresponding channel decoders. In addition, … by SCMA with a large number of users, which …

… Abstract—Sphere decoding (SD) based detection schemes for sparse code multiple access
(SCMA… However, the existing SD-based schemes can only be applied to SCMA systems with …

… SCMA is a kind of multisubcarrier NOMA. As such, instead of carrying out sphere decoding
… A sphere decoder for SCMA also has the advantage of being applicable to the low number …