计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2010年
4期
127-128,141
,共3页
部分平衡不完全区组设计%准循环低密度校验码%围长%和积译码
部分平衡不完全區組設計%準循環低密度校驗碼%圍長%和積譯碼
부분평형불완전구조설계%준순배저밀도교험마%위장%화적역마
Partially Balanced Incomplete Block Design(PBIBD)%quasi-cyclic LDPC codes%girth%sum-product decoding
通过构造部分平衡不完全区组设计,得到一类低密度校验(LDPC)码,其最小环长(girth)至少为6,码率的选取具有很大的灵活性,而且可以具有准循环结构,进一步,也利用其构造了girth至少为8的准循环LDPC码.计算机仿真结果表明,在加性高斯白噪声信道中与随机码相比,我们构造的一些码具有稍好的译码性能.
通過構造部分平衡不完全區組設計,得到一類低密度校驗(LDPC)碼,其最小環長(girth)至少為6,碼率的選取具有很大的靈活性,而且可以具有準循環結構,進一步,也利用其構造瞭girth至少為8的準循環LDPC碼.計算機倣真結果錶明,在加性高斯白譟聲信道中與隨機碼相比,我們構造的一些碼具有稍好的譯碼性能.
통과구조부분평형불완전구조설계,득도일류저밀도교험(LDPC)마,기최소배장(girth)지소위6,마솔적선취구유흔대적령활성,이차가이구유준순배결구,진일보,야이용기구조료girth지소위8적준순배LDPC마.계산궤방진결과표명,재가성고사백조성신도중여수궤마상비,아문구조적일사마구유초호적역마성능.
This paper constructs Partially Balanced Incomplete Block Designs(PBIBD)based on finite fields,and uses them to construct regular Low-Density Parity-Cheek(LDPC)codes.The constructed LDPC codes are free of 4-cyeles and with high flexibility for the choosing of the code rate.Further,the paper even constructs QC-LDPC codes with girth at least 8,they Can also be quasi-cyclic.Simulation results show that some of the codes can have Blishdy better performance than random regular LDPC codes over AWGN channel.
