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Polar-Coded Non-Orthogonal Multiple Access. (arXiv:1705.05976v1 [cs.IT])
来源于:arXiv
Non-orthogonal multiple access (NOMA) is one of the key techniques to address
the high spectral efficiency and massive connectivity requirements for the
fifth generation (5G) wireless system. To efficiently realize NOMA, we propose
a joint design framework combining the polar coding and the NOMA transmission,
which deeply mines the generalized polarization effect among the users. In this
polar coded NOMA (PC-NOMA) framework, the original NOMA channel is decomposed
into multiple bit polarized channels by using a three-stage channel transform,
that is, user$\to$signal$\to$bit partitions. Specifically, for the first-stage
channel transform, we design two schemes, namely sequential user partition
(SUP) and parallel user partition (PUP). For the SUP, a joint successive
cancellation detecting and decoding scheme is developed, and a search algorithm
is proposed to schedule the NOMA detecting order which improves the system
performance by enhanced polarization among the user synthesized channe 查看全文>>