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Being the enabling technique for 5G wireless communications, massive multiple-input multiple-output (MIMO) system can drastically increase the capacity efficiency. However, a few hundreds of antennas will inevitably introduce notable complexity and therefore hinders its direct adoption. Though the state-of-the-art (SOA) iterative methods such as conjugate gradient (CG) detection show complexity advantage...
In this paper, a hardware-efficient folded SC polar decoder based on k-segment decomposition is first proposed. The proposed k-segment scheme employs (k – 1) N1/k-bit decoders to implement the original N-bit decoder, and reduces the number of mixed-nodes from (N – 1) to (k ă 1)( N1/k – 1) with slightly increased latency. In addition, pipelining technique, partial parallel processing, and pre-computation...
Sparse code multiple access (SCMA) is a new kind of multiple access (MA) technology which ranks one of the most promising candidates for 5G wireless because of its outstanding performance. SCMA enjoys stronger overloading tolerance compared with traditional MA technologies. It also takes the advantage of sparse property to achieve lower complexity when using message passing algorithm (MPA). In this...
Affected by relaxation factor ω, for large-scale MIMO uplink, successive over relaxation (SOR) detection involves low-complexity matrix inversion but unstable performance as ω changes. In this paper, a more stable and efficient SOR-based detection, which is nearly unaffected by ω, is proposed. First, the convergence of the proposed method is proved. Both analytic and numerical results have shown that,...
Sparse code multiple access (SCMA) is a new kind of multiple access (MA) technology which ranks one of the most promising candidates for 5G wireless because of its outstanding performance. SCMA enjoys stronger overloading tolerance compared with traditional MA technologies. It also takes the advantage of sparse property to achieve lower complexity when using message passing algorithm (MPA). In this...
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