Because of the speed limitation of the conventional bit-selection strategy in the exi- sting weighted bit flipping algorithms, a high- speed Low-Density Parity-Check （LDPC） dec- oder cannot be realised. To solve thi...Because of the speed limitation of the conventional bit-selection strategy in the exi- sting weighted bit flipping algorithms, a high- speed Low-Density Parity-Check （LDPC） dec- oder cannot be realised. To solve this problem, we propose a fast weighted bit flipping algo- rithm. Specifically, based on the identically dis- tributed error bits, a parallel bit-selection met- hod is proposed to reduce the selection delay of the flipped bits. The delay analysis demon- strates that, the decoding speed of LDPC codes can be significantly improved by the proposed algorithm. Furthermore, simulation results ver- ify the validity of the proposed algorithm.展开更多
以信息节点的幅度和作为校验方程的可靠度信息,提出两种简单高效的低密度奇偶效验(low density parity check,LDPC)码的加权比特翻转(weighted bit flipping,WBF)译码算法。仿真结果表明,在加性高斯白噪声信道下,误比特率为10-5时,相比...以信息节点的幅度和作为校验方程的可靠度信息,提出两种简单高效的低密度奇偶效验(low density parity check,LDPC)码的加权比特翻转(weighted bit flipping,WBF)译码算法。仿真结果表明,在加性高斯白噪声信道下,误比特率为10-5时,相比于传统的WBF和改进型WBF(modified WBF,MWBF)算法,提出的一种算法可分别获得约1.65dB和1.31dB的增益。同时,平均迭代次数也大大降低。展开更多
利用统计译码思想由LDPC(Low Density Parity Check)码校验矩阵通过矢量的线性组合构造出一个新的低密度校验矢量集合,并结合LDPC码并行比特翻转译码算法的环检测等特点的分析,提出了一种新的硬判决译码方案。仿真结果表明:改进算法在...利用统计译码思想由LDPC(Low Density Parity Check)码校验矩阵通过矢量的线性组合构造出一个新的低密度校验矢量集合,并结合LDPC码并行比特翻转译码算法的环检测等特点的分析,提出了一种新的硬判决译码方案。仿真结果表明:改进算法在译码性能上接近BP算法,又保持了并行比特翻转算法迭代次数少的优点。展开更多
基金supported in part by the National Natural Science Foundation of China under Grant No.61072069the Fundamental Research Funds for the Central Universities under Grant No.72001859+1 种基金the Important National Science and Technology Specific Projects under Grant No.2011ZX03003-001-04the One Church,One Family,One Purpose Project(111 Project)under Grant No.B08038
文摘Because of the speed limitation of the conventional bit-selection strategy in the exi- sting weighted bit flipping algorithms, a high- speed Low-Density Parity-Check （LDPC） dec- oder cannot be realised. To solve this problem, we propose a fast weighted bit flipping algo- rithm. Specifically, based on the identically dis- tributed error bits, a parallel bit-selection met- hod is proposed to reduce the selection delay of the flipped bits. The delay analysis demon- strates that, the decoding speed of LDPC codes can be significantly improved by the proposed algorithm. Furthermore, simulation results ver- ify the validity of the proposed algorithm.
文摘以信息节点的幅度和作为校验方程的可靠度信息,提出两种简单高效的低密度奇偶效验(low density parity check,LDPC)码的加权比特翻转(weighted bit flipping,WBF)译码算法。仿真结果表明,在加性高斯白噪声信道下,误比特率为10-5时,相比于传统的WBF和改进型WBF(modified WBF,MWBF)算法,提出的一种算法可分别获得约1.65dB和1.31dB的增益。同时,平均迭代次数也大大降低。
文摘利用统计译码思想由LDPC(Low Density Parity Check)码校验矩阵通过矢量的线性组合构造出一个新的低密度校验矢量集合,并结合LDPC码并行比特翻转译码算法的环检测等特点的分析,提出了一种新的硬判决译码方案。仿真结果表明:改进算法在译码性能上接近BP算法,又保持了并行比特翻转算法迭代次数少的优点。
