%0 Journal Article
%T A search algorithm to construct girth-8 quasi-cyclic LDLC<br>一种构造八环准循环LDLC码的搜索算法
%A 朱联祥
%A 杨海艳
%J 重庆邮电大学学报(自然科学版)
%D 2011
%I 
%X In order to find a kind of linear code with simple structure and approaching Shannon limit, based on the algorithm of constructing quasi-cyclic low density parity check (LDPC) codes and combined with the characteristic of low density lattice codes (LDLC), the LDLC with girth-8 through improving the algorithm was constructed. The new algorithm ensures the LDLC generating sequence distribute in each row or each column randomly and its uniformity in each row and each column. Meanwhile this article analyses the complexity of the algorithm. Simulation result in AWGN channel shows that the performance of girth-8 LDLC code using the proposed algorithm is better than the present girth-6 LDLC code.
%K low density lattice codes(LDLC)
%K search algorithm
%K distance graph
%K low density parity check(LDPC)<br>低密度网格码（LDLC）
%K 搜索算法
%K 距离图
%K 低密度奇偶校验（LDPC）
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=01BA20E8BA813E1908F3698710BBFEFEE816345F465FEBA5&cid=96E6E851B5104576C2DD9FC1FBCB69EF&jid=5C2694A2E5629ECD6B59D7B28C6937AD&aid=8A9892E12714AC7FC184F9B2728D0F6A&yid=9377ED8094509821&vid=EA389574707BDED3&iid=94C357A881DFC066&sid=18F040DBCB74FFF9&eid=03EE8EDD44A3D4BE&journal_id=1673-825X&journal_name=重庆邮电大学学报(自然科学版)&referenced_num=0&reference_num=0