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Sparse-code multiple-access (SCMA) is a novel multiplexing method to increase the capacity of wireless communication systems. By giving users non-orthogonal codebook with few non-zero entries, the SCMA approach can highly improve the spectral efficiency, compared with traditional orthogonal ones such as CDMA, with tolerable detection complexity. Therefore, it has been considered as an option for 5G...
In this paper, belief propagation (BP) detection based on max-sum (MS) algorithm for massive multiple-input multiple-output (MIMO) systems is therefore proposed to reduce computational complexity of general belief propagation. Owing to employing the approximation strategy, complexity reduction of MS is at the expense of detection performance loss. Based on MS algorithm, two effective approaches are...
By adopting multiple-input multiple-output (MIMO) technique, the spectral efficiency and data rate of wireless communication systems can be highly improved. To fully take the advantages of MIMO, belief prorogation (BP) detection methods are considered as a way in balancing the hardware complexity and error performance. Also with BP methods, polar code, which has been adopted by 3GPP eMBB control channel,...
Due to its inherent higher parallelism over successive cancellation (SC) polar decoder, belief propagation (BP) polar decoder becomes more favorable for high throughput applications. However, most existing BP decoders suffer from low utilization. In this paper, a new updating scheme, in which both left-to-right and right-to-left messages are considered identical, is first proposed for memory reduction...
Polar codes, the first class of codes that can provably achieve the capacity of symmetric binary-input discrete memoryless channels (B-DMCs), have drawn intensive attentions recently. In general, polar codes can be decoded by either successive cancellation (SC) algorithm or belief propagation (BP) algorithm. Unlike SC decoding, BP decoding shows high-parallelization capability and its performance...
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