Accelerating FPGA-Based Emulation of Quasi-Cyclic LDPC Codes With Vector Processing

FPGAs are widely used for evaluating the error-floor performance of LDPC (Low-Density Parity-Check) codes. The authors propose a scalable vector decoder for FPGA-based implementation of Quasi-Cyclic (QC) LDPC codes that takes advantage of the high bandwidth of the embedded memory blocks (called Block RAMs in a Xilinx FPGA) by packing multiple messages into the same word. They describe a vectorized overlapped message passing algorithm that results in 3.5X to 5.5X speedup over state-of-the-art FPGA implementations in literature.

Provided by: edaa Topic: Hardware Date Added: Jun 2009 Format: PDF

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