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This paper proposes a layered decoder architecture for array QC-LDPC codes which targets tens of Gbps data rates. It relies on layer unrolling with pipeline stages in between layers, allowing simultaneous decoding of multiple layers. The most important features of the proposed decoder are: (i) fully parallel processing units within each layer (ii) hardwired layer interconnect that allows the removal...
This paper proposes memory efficient FPGA implementations for layered quasi-cyclic (QC) LDPC decoders, based on the Self-Correcting Min-Sum (SCMS) algorithm. We address the problem of high memory overhead required by layered SCMS based decoders compared to conventional Min-Sum (MS), by proposing two improvements. These require changes in the flow/rule of the conventional SCMS algorithm, in order to...
This paper proposes an FPGA based layered architecture for quasi-cyclic (QC) irregular LDPC decoder. Our approach is based on merging variable and check node processing into one single variable-check node (VCN) unit. Layer message computation is done using a parallel scheme of a number of VCNs equal to the expansion factor of the QC matrix. The proposed architecture is characterized by the serial...
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