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A Reconstruction-Computation-Quantization (RCQ) Approach to Node Operations in LDPC Decoding [article]

Linfang Wang, Maximilian Stark, Richard D. Wesel, Gerhard Bauch
<span title="2020-05-14">2020</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
In this paper, we propose a finite-precision decoding method that features the three steps of Reconstruction, Computation, and Quantization (RCQ).  ...  In contrast, the proposed RCQ decoder may be applied to any off-the-shelf LDPC code, including those with a large fraction of degree-2 variable nodes.Our simulations show that a 4-bit Min-Sum RCQ decoder  ...  RECONSTRUCTION COMPUTATION QUANTIZATION DECODING STRUCTURE  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2005.07259v1">arXiv:2005.07259v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/xa2qsp57vffazfimxoehyk2fai">fatcat:xa2qsp57vffazfimxoehyk2fai</a> </span>
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Reconstruction-Computation-Quantization (RCQ): A Paradigm for Low Bit Width LDPC Decoding [article]

Linfang Wang, Caleb Terrill, Maximilian Stark, Zongwang Li, Sean Chen, Chester Hulse, Calvin Kuo, Richard Wesel, Gerhard Bauch, Rekha Pitchumani
<span title="2022-02-09">2022</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
This paper uses the reconstruction-computation-quantization (RCQ) paradigm to decode low-density parity-check (LDPC) codes.  ...  Simulation results for a (9472, 8192) quasi-cyclic (QC) LDPC code show that a layered MinSum RCQ decoder with 3-bit messages achieves more than a 10% reduction in LUTs and routed nets and more than a 6%  ...  Bauch, "A Reconstruction-Computation-Quantization (RCQ) approach to node operations in LDPC decoding," in GLOBECOM 2020 -2020 IEEE Glob. Comm. Conf., Dec. 2020, pp. 1-6.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2111.08920v2">arXiv:2111.08920v2</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/357hzyvg3rhybapxt7o4z7czse">fatcat:357hzyvg3rhybapxt7o4z7czse</a> </span>
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FPGA Implementations of Layered MinSum LDPC Decoders Using RCQ Message Passing [article]

Caleb Terrill, Linfang Wang, Sean Chen, Chester Hulse, Calvin Kuo, Richard Wesel, Dariush Divsalar
<span title="2021-04-19">2021</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
Non-uniform message quantization techniques such as reconstruction-computation-quantization (RCQ) improve error-correction performance and decrease hardware complexity of low-density parity-check (LDPC  ...  Layered MinSum RCQ (L-msRCQ) enables message quantization to be utilized for layered decoders and irregular LDPC codes.  ...  Reconstruction-Computation-Quantization Decoder An RCQ decoder allows for a low bit width representation ofV i mn andÛ i mn by setting dynamic quantization and reconstruction mappings.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2104.09480v1">arXiv:2104.09480v1</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/nffhrzfzzbfn3o37ghmmqnpqb4">fatcat:nffhrzfzzbfn3o37ghmmqnpqb4</a> </span>
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Generalized Mutual Information-Maximizing Quantized Decoding of LDPC Codes with Layered Scheduling [article]

Peng Kang, Kui Cai, Xuan He, Shuangyang Li, Jinhong Yuan
<span title="2022-02-12">2022</span> <i > arXiv </i> &nbsp; <span class="release-stage" >pre-print</span>
In this paper, we propose a framework of the mutual information-maximizing (MIM) quantized decoding for low-density parity-check (LDPC) codes by using simple mappings and fixed-point additions.  ...  For small decoding iterations, the MIM quantized decoders also achieve a faster convergence speed compared to the benchmarks.  ...  Meanwhile, Wang et al. proposed a decoding method in [30] based on the reconstruction-computation-quantization (RCQ) approach to mitigate the performance degradation caused by LUT decomposition.  ... 
<span class="external-identifiers"> <a target="_blank" rel="external noopener" href="https://arxiv.org/abs/2011.13147v5">arXiv:2011.13147v5</a> <a target="_blank" rel="external noopener" href="https://fatcat.wiki/release/orht4ucx4ndsfg4buiszwo3rzu">fatcat:orht4ucx4ndsfg4buiszwo3rzu</a> </span>
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