id author title date pages extension mime words sentence flesch summary cache txt jd472v2639f Christine Ann Kelley Pseudocodewords, Expander Graphs, and the Algebraic Construction of Low-density Parity-check Codes 2008 .txt text/plain 364 16 41 Despite their tremendous success, LDPC codes lack a strong theoretical foundation and few explicit constructions of them are known that outperform their random counterparts. The second part of this thesis constructs LDPC codes having desirable properties. cache/jd472v2639f.txt txt/jd472v2639f.txt