Abstract : Sparse Code Multiple Access (SCMA) has been
recently proposed for the future generation of wireless communication
standards. SCMA system design involves specifying several
parameters. In order to simplify the procedure, most works
consider a multistage design approach. Two main stages are
usually emphasized in these methods: sparse signatures design
(equivalently, resource allocation) and codebook design. In this
paper, we present a novel SCMA codebook design method.
The proposed method considers SCMA codebooks structured
with an underlying vector space obtained from classical block
codes. In particular, when using maximum distance separable
(MDS) codes, our proposed design provides maximum signalspace
diversity with a relatively small alphabet. The use of
small alphabets also helps to maintain desired properties in the
codebooks, such as low peak-to-average power ratio and lowcomplexity
detection.
