Abstract—In this correspondence, we propose an approach to construct irregular low-density parity-check (LDPC) codes based on quasi-cyclic extension. When decoded iteratively, the constructed irregular LDPC codes exhibit a relatively low error floor in the high signal-to-noise ratio (SNR) region and are subject to relatively few undetected errors. The LDPC codes constructed based on the proposed scheme remain efficiently encodable.
July 23, 2013https://www.qualcomm.com/media/documents/files/construction-of-irregular-ldpc-codes-by-quasi-cyclic-extension.pdf
Jinghu Chen, R. Michael Tanner, Juntan Zhang, Marc P. C. FossorierJuly 23, 2013