基于光通信系统中低密度奇偶校验(LDPC)码型的构造原则和构造方法,构造了适用于光通信系统中冗余度为6.69%的新颖LDPC(3969,3720)和冗余度为4.56%的新颖LDPC(8281,7920)码。仿真分析表明:在10-12的误码率(BER)时,这两种新颖码型在迭代18次后的净编码增益(NCG)分别比ITU-TG.975中RS(255,236)码的NCG大1.63dB和1.49dB,并且LDPC码的译码可在硬件上并行实现;这两种新颖码型的译码速度相当快,与ITU-TG.975.1中级联码型相比,这两种LDPC码的实现复杂度要低得多,可在将来的硬件实现中节省存储空间和减少计算量。因而,所构造的这两种新颖LDPC码型都可作为超验前向纠错(SFEC)码的候选码型。
Based on the construction principles of the low-density Parity-check code(LDPC)for optical communication systems,a novel construction method of the LDPC code is proposed,and the novel LDPC(3969,3720)code with 6.69% redundancy and the novel LDPC(8281,7920)code with 4.56% redundancy are constructed.The simulation results show that the net coding gain(NCG)of the two LDPC codes at the eighteenth iteration with the BER of 10-12 are respectively 1.63 dB,1.49 dB which are more than that of the RS(255.239)code in I...