31 citations · 31 across the 3 of their papers we have counts for
4 papers
Unsourced Random Access with ThresholdBased Feedback
Murwan Bashir, Ehsan Nassaji, Dmitri Truhachev +2
In this paper we focus on a feedback mechanism for unsourced random access (URA) communications. We propose an algorithm to construct feedback packets broadcasted to the users by t…
Multidimensional Constellations for Uplink SCMA Systems --- A Comparative Study
Monirosharieh Vameghestahbanati, Ian Marsland, Ramy H. Gohary +1
Sparse code multiple access (SCMA) is a class of non-orthogonal multiple access (NOMA) that is proposed to support uplink machine-type communication services. In an SCMA system, de…
Enabling Sphere Decoding for SCMA
Monirosharieh Vameghestahbanati, Ebrahim Bedeer, Ian Marsland +2
In this paper, we propose a reduced-complexity optimal modified sphere decoding (MSD) detection scheme for SCMA. As SCMA systems are characterized by a number of resource elements…
Polar Codes for SCMA Systems
Monirosharieh Vameghestahbanati, Ian Marsland, Ramy H. Gohary +1
In this paper, we design and compare multilevel polar coding (MLPC) and bit-interleaved polar coded modulation (BIPCM) for uplink sparse code multiple access (SCMA) systems that op…