Optimized extension of the parity check matrix for rate compatible LDPC codes
CHEN Zi-qiang， OUYANG Shan，LI Min-zheng，ZANG Lan， XIAO Hai-lin
Systems Engineering and Electronics . 2013, (9): 1961 -1965 .  DOI: 10.3969/j.issn.1001-506X.2013.09.26