Abstract
A construction of physical-layer Raptor (PLR) codes based on protographs is proposed. We first set up a sequence of signal-to-noise ratios (SNRs). For each SNR, we employ a modified protograph EXIT analysis to find the extra check nodes in addition to the existing check nodes so as to meet the threshold required by the outer low-density parity check code. PLR codes which are capacity-approaching for a wide SNR range can be obtained using the proposed construction.
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Kuo, S. H., Lee, H. C., Ueng, Y. L., & Lin, M. C. (2015). A Construction of Physical-Layer Systematic Raptor Codes Based on Protographs. IEEE Communications Letters, 19(9), 1476–1479. https://doi.org/10.1109/LCOMM.2015.2448678
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