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Two Bit-Serial Architectures for Check Node Update in Min-Sum Decoding of LDPC Codes 认领 引用
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作者 Hu Qing He Xuan +2 位作者 Luo Lisha Cai Kui Tang Xiaohu 《China Communications》 SCIE EI CSCD 2026年第3期142-150,共9页
Implementing check node(CN)update based on the minimum value(MV)and second MV of incoming message magnitudes is crucial for Min-Sum Algorithms(MSAs).In the category of bit-serial implementations,existing schemes suffe... Implementing check node(CN)update based on the minimum value(MV)and second MV of incoming message magnitudes is crucial for Min-Sum Algorithms(MSAs).In the category of bit-serial implementations,existing schemes suffer from decoding performance degradation,large hardware areas,and/or long latency.In this paper,we propose two efficient CN update functions based on the MV and an approximate second MV,and design bit-serial architectures to implement them.Simulation results show that our functions exhibit the minimum decoding performance degradation compared to the existing functions using approximate second MVs.Moreover,the applicationspecific integrated circuits(ASIC)implementation results demonstrate the advantages of our architectures in terms of area,latency,etc. 展开更多
关键词 bit-serial check node update hardware implementation LDPC code min-sum algorithm
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Study on the aided PC-ASCL decoding algorithm based on optimized parity check codes 认领 引用
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作者 Jianguo YUAN Deyi YANG +1 位作者 Ziliang ZHU Jinneng XIANG 《Optoelectronics Letters》 EI 2026年第2期87-91,共5页
Aiming at the poor performance of the parity check(PC) aided adaptive successive cancellation list(PC-ASCL) decoding algorithm because the PC code in the polar code can only verify odd errors, an optimized parity chec... Aiming at the poor performance of the parity check(PC) aided adaptive successive cancellation list(PC-ASCL) decoding algorithm because the PC code in the polar code can only verify odd errors, an optimized parity check(OPC) code which can verify all odd errors as well as the half even errors is proposed. The OPC code is used to improve the PC-ASCL decoding algorithm, thus an OPC aided ASCL(OPC-ASCL) decoding algorithm is proposed. In the coding stage, the algorithm divides the information sequence into multiple segments, and places an OPC code at the end of each segment to verify the current information sequence, and places a cyclic redundancy check code at the end of the entire information sequence to verify the entire information sequence. In the decoding stage, the algorithm uses the OPC-ASCL decoder to decode. Simulation results show that compared to the PC-ASCL decoding algorithm, the OPC-ASCL decoding algorithm can reduce the complexity and obtain the certain performance gain. 展开更多
关键词 pc ascl decoding pc code adaptive successive cancellation list pc ascl divides information sequence multip parity check polar code optimized parity check coding stage
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Computation-Efficient Decoding of LDPC Codes for High-Speed Space Laser Communications 认领 引用
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作者 Hu Zhuojun Chen Zhao +1 位作者 Kuang Linling Yin Liuguo 《China Communications》 SCIE EI CSCD 2025年第12期108-123,共16页
Space laser communication(SLC)is an emerging technology to support high-throughput data transmissions in space networks.In this paper,to guarantee the reliability of high-speed SLC links,we aim at practical implementa... Space laser communication(SLC)is an emerging technology to support high-throughput data transmissions in space networks.In this paper,to guarantee the reliability of high-speed SLC links,we aim at practical implementation of low-density paritycheck(LDPC)decoding under resource-restricted space platforms.Particularly,due to the supply restriction and cost issues of high-speed on-board devices such as analog-to-digital converters(ADCs),the input of LDPC decoding will be usually constrained by hard-decision channel output.To tackle this challenge,density-evolution-based theoretical analysis is firstly performed to identify the cause of performance degradation in the conventional binaryinitialized iterative decoding(BIID)algorithm.Then,a computation-efficient decoding algorithm named multiary-initialized iterative decoding with early termination(MIID-ET)is proposed,which improves the error-correcting performance and computation efficiency by using a reliability-based initialization method and a threshold-based decoding termination rule.Finally,numerical simulations are conducted on example codes of rates 7/8 and 1/2 to evaluate the performance of different LDPC decoding algorithms,where the proposed MIID-ET outperforms the BIID with a coding gain of 0.38 dB and variable node calculation saving of 37%.With this advantage,the proposed MIID-ET can notably reduce LDPC decoder’s hardware implementation complexity under the same bit error rate performance,which successfully doubles the total throughput to 10 Gbps on a single-chip FPGA. 展开更多
关键词 computation-efficient decoding highspeed decoders LDPC codes LLR initialization space laser communications
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基于误码置零的LDPC码稀疏校验矩阵重建 认领 引用
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作者 王忠勇 贺东旭 +2 位作者 巩克现 翟慧鹏 王玮 《系统工程与电子技术》 EI CSCD 北大核心 2026年第5期1765-1771,共7页
为提升高误码率、接收码字个数较少情况下低密度奇偶校验(low density parity check,LDPC)码稀疏校验矩阵重建性能,提出一种将含错码字置零和分层置信传播(layered belief propagation,LBP)译码相结合的算法。该算法基于随机抽取和高斯... 为提升高误码率、接收码字个数较少情况下低密度奇偶校验(low density parity check,LDPC)码稀疏校验矩阵重建性能,提出一种将含错码字置零和分层置信传播(layered belief propagation,LBP)译码相结合的算法。该算法基于随机抽取和高斯消元法获取稀疏校验向量,利用该校验向量对含错的接收码字进行校验,将校验不通过的码字置为零向量,提高了随机抽取迭代前期获取的稀疏校验向量个数。当稀疏校验向量个数到达阈值后使用LBP译码方法纠正错误比特,提升了LDPC码稀疏校验矩阵的重建率。仿真结果表明,对于IEEE802.11n协议下的(648,324)LDPC码,所提算法在高误码率且接收码字个数较少的条件下,稀疏校验矩阵重建率可达84%,相比现有算法提升了约40%,有效提高了重建算法的容错能力。 展开更多
关键词 低密度奇偶校验 稀疏校验矩阵 随机抽取 误码置零 重建算法
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一种LDPC码的自适应分层阈值最小和译码算法 认领 引用
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作者 袁建国 熊龙宇 胡坤 《半导体光电》 CAS 北大核心 2026年第1期158-163,共6页
针对低密度奇偶校验码的最小和译码算法性能有限及传统译码算法收敛速度较慢等问题,提出一种自适应分层阈值最小和(Adaptive Layered Threshold Min-Sum,ALTMS)译码算法。该算法结合阈值归一化最小和译码算法与阈值偏移最小和译码算法... 针对低密度奇偶校验码的最小和译码算法性能有限及传统译码算法收敛速度较慢等问题,提出一种自适应分层阈值最小和(Adaptive Layered Threshold Min-Sum,ALTMS)译码算法。该算法结合阈值归一化最小和译码算法与阈值偏移最小和译码算法的优势,通过动态调整修正因子,使其随迭代次数自适应变化。同时,采用分层调度方式,有效提升了算法收敛速度和译码性能。仿真结果表明,与分层调度下的四种阈值最小和译码算法相比,所提出的ALTMS译码算法实现了一定的性能增益,相比使用固定修正因子的最小和译码算法展现出更优越的纠错性能。 展开更多
关键词 低密度奇偶校验码 最小和译码算法 分层调度 修正因子 迭代次数
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面向OCC系统的QC-LDPC编译码算法设计与实现 认领 引用
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作者 闫晓明 石迪 +2 位作者 籍风磊 王铭阳 王勇 《吉林大学学报（信息科学版）》 CAS 2026年第4期749-755,共7页
针对可见光信道中的干扰较强,且现阶段OCC(Optical Camera Communication)系统的编码技术纠错性能不足,造成OCC系统可靠性降低的问题,提出了一种面向OCC系统的QC-LDPC(Quasi-Cyclic Low Density Parity Check Code)编译码算法。根据OCC... 针对可见光信道中的干扰较强,且现阶段OCC(Optical Camera Communication)系统的编码技术纠错性能不足,造成OCC系统可靠性降低的问题,提出了一种面向OCC系统的QC-LDPC(Quasi-Cyclic Low Density Parity Check Code)编译码算法。根据OCC系统的结构特点以及信道链路特性,确定具有结构化设计和低复杂度译码特性的QC-LDPC码作为纠错码型,采用快速编码算法减小编码过程的运算复杂度;结合归一化最小和算法和分层译码算法的各自特点提出了一种改进的L-MS(Layer-Min Sum)译码算法。OCC系统实验平台测试结果表明,在室内环境通信场景下,OCC系统的误码率为3.16×10-6,通信速率为2850.4 bit/s;在室外环境通信场景下,OCC系统的误码率为9.07×10-6,通信速率为2797.9 bit/s,在保证低误码率的同时,兼顾了数据的传输速率。 展开更多
关键词 可见光相机通信 编译码 LDPC码 现场可编程门阵列 帧结构
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基于改进平衡优化算法的LDPC多参数译码算法 认领 引用
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作者 李聪颖 李光浩 +1 位作者 陈雯雯 胡旻威 《华中科技大学学报（自然科学版）》 EI CAS CSCD 北大核心 2026年第3期117-123,共7页
为了优化低密度奇偶校验(LDPC)译码参数,提出了一种基于改进平衡优化算法(EO)的多参数联合优化LDPC译码框架,命名为改进EO优化-多参数译码算法(IEO-MPDA).该框架通过结合分层归一化最小和算法(LNMSA)与分层偏移最小和算法(LOMSA),将参... 为了优化低密度奇偶校验(LDPC)译码参数,提出了一种基于改进平衡优化算法(EO)的多参数联合优化LDPC译码框架,命名为改进EO优化-多参数译码算法(IEO-MPDA).该框架通过结合分层归一化最小和算法(LNMSA)与分层偏移最小和算法(LOMSA),将参数搜索空间从一维扩展至二维,从而提高了参数优化的自由度.此外,通过引入自适应停滞检测机制、动态指数加权平衡池构建、精英个体交叉变异操作及拉丁超立方初始化方法,有效克服了传统EO算法在解决译码参数优化问题时易陷入局部最优的问题.仿真结果表明:IEO-MPDA的译码性能在不增加译码复杂度的前提下较现有传统方法优约0.2 dB. 展开更多
关键词 LDPC译码 分层归一化最小和算法 分层偏移最小和算法 元启发式算法 改进EO优化-多参数译码
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神经网络辅助的非二进制量子LDPC码置信传播译码研究 认领 引用
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作者 张千辉 樊继豪 《南京理工大学学报》 CAS CSCD 北大核心 2026年第2期220-229,共10页
置信传播(BP)算法在量子低密度奇偶校验(LDPC)码译码问题上取得了许多进展。该文针对非二进制条件下的量子短环和错误简并问题,提出了一种新的基于递归神经网络的置信传播(RNBP)译码方案。具体的,在损失函数部分,RNBP将适用于经典错误... 置信传播(BP)算法在量子低密度奇偶校验(LDPC)码译码问题上取得了许多进展。该文针对非二进制条件下的量子短环和错误简并问题,提出了一种新的基于递归神经网络的置信传播(RNBP)译码方案。具体的,在损失函数部分,RNBP将适用于经典错误模式的交叉熵损失与适用于量子错误模式的逻辑损失相结合,并为这个损失函数设置了一个超参数,以便更好地完成这项多目标任务。仿真结果表明,RNBP译码方案缓解了量子短环问题,以较高的概率检测出简并错误。在该文测试的标准CSS形式的量子码上,RNBP方案译码效果优于传统BP,将逻辑错误率从10-2抑制到10-3与10-4之间。该文的RNBP方案还考虑了非对称信道译码,性能同样优于传统BP。在XZZX形式的扭曲量子码上,将传统BP所能达到的逻辑错误率从10-2抑制到10-3左右。 展开更多
关键词 量子LDPC码 神经网络译码 量子简并 非对称信道
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面向6G的高效率QC-LDPC码设计 认领 引用
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作者 李立广 徐俊 +1 位作者 许进 陈梦竹 《移动通信》 2026年第5期19-27,共9页
在各类无线移动通信中,QC-LDPC(Quasi-Cyclic Low-Density Parity-Check)码被广泛用作数据信道的前向纠错编码方案。由于其结构规则且易于实现高并行译码,QC-LDPC码特别适用于高数据速率传输。然而,6G通信要求超高的数据速率与超高的能... 在各类无线移动通信中,QC-LDPC(Quasi-Cyclic Low-Density Parity-Check)码被广泛用作数据信道的前向纠错编码方案。由于其结构规则且易于实现高并行译码,QC-LDPC码特别适用于高数据速率传输。然而,6G通信要求超高的数据速率与超高的能效,而现有5G LDPC码存在译码收敛速度较慢问题,从而导致其译码的计算复杂度高并且功耗较大。因此,提出一种面向6G的高效率QC-LDPC码设计。通过减少LDPC译码的奇偶校验矩阵的边数并且提升迭代译码的收敛速度,所提出的方案能够在保持译码性能的同时降低LDPC译码的计算复杂度,从而可以在性能与复杂度之间实现最佳平衡。 展开更多
关键词 6G QC-LDPC 快速收敛译码 边消除
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RIS辅助的SC-LDPC乘积码中继协作码的构造与交替译码研究 认领 引用
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作者 杨晨 张顺外 《无线电工程》 2026年第4期574-581,共8页
针对基于可重构智能表面(Reconfigurable Intelligent Surface,RIS)辅助的空间耦合低密度奇偶校验(Spatially-Coupled Low Density Parity Check,SC-LDPC)乘积码中继协作展开研究。信源节点通过SC-LDPC乘积码对信息矩阵行编码,并通过中... 针对基于可重构智能表面(Reconfigurable Intelligent Surface,RIS)辅助的空间耦合低密度奇偶校验(Spatially-Coupled Low Density Parity Check,SC-LDPC)乘积码中继协作展开研究。信源节点通过SC-LDPC乘积码对信息矩阵行编码,并通过中继节点对信息矩阵列编码;为进一步提升编码增益,采用基于复制与掩码(Replication and Masking,R&M)代数构造方法对SC-LDPC码的校验矩阵消环设计。该方法通过系统性地消除校验矩阵中的短环结构,显著提升了码字的围长,降低了误码平层。目的节点对接收的2路信号进行SC-LDPC乘积码行译码与列译码的交替译码,通过在行与列2个维度之间实时交换软信息,使译码器可以更及时地识别并纠正潜在错误,有效提升了迭代收敛速度与译码可靠性。仿真结果表明,基于R&M代数构造的SC-LDPC乘积码相较于一般SC-LDPC乘积码具有更优性能;列译码和行译码的信息交互也有助于提高译码效率,降低误码率(Bit Error Rate,BER)。 展开更多
关键词 可重构智能表面 空间耦合低密度奇偶校验 乘积码 校验矩阵 编码中继协作 交替迭代译码
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面向6G高可靠通信的增强型Transformer LDPC译码方法 认领 引用
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作者 刘希 袁晓威 +2 位作者 徐晓林 夏斌 魏岳军 《移动通信》 2026年第5期67-74,89,共8页
针对6G超高可靠通信中LDPC(Low-Density Parity-Check)译码算法在有限迭代下易受误差平层限制的问题,提出一种增强型Transformer译码训练框架。该框架在保持前向译码结构与基线模型一致的前提下,通过高信噪比未校正样本采集、重要性采... 针对6G超高可靠通信中LDPC(Low-Density Parity-Check)译码算法在有限迭代下易受误差平层限制的问题,提出一种增强型Transformer译码训练框架。该框架在保持前向译码结构与基线模型一致的前提下,通过高信噪比未校正样本采集、重要性采样增强、分块渐进式微调及动态权重共享机制,显著提升了译码器对稀有错误模式的学习能力。仿真结果表明,在BPSK(Binary Phase Shift Keying)调制与AWGN(Additive White Gaussian Noise)信道条件下,针对短码LDPC(121,60)与长码LDPC(4096,2048),所提增强模型相比OMS(Offset Min-Sum)算法在BER(Bit Error Rate)为10-4时分别获得约0.65 dB和0.12 dB的性能增益,并有效改善了误差平层区域的下降趋势,为6G高可靠编码传输提供了一种具有工程潜力的智能优化方案。 展开更多
关键词 6G超高可靠通信 LDPC 误差平层 Transformer解码 神经网络解码
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Construction of LDPC Codes for the Layered Decoding Algorithm 认领 引用 被引量：4
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作者 Wang Da Dong Mingke +2 位作者 Chen Chen Jin Ye Xiang Haige 《China Communications》 SCIE CSCD 2012年第7期99-107,共9页
Abstract： The layered decoding algorithm has been widely used in the implementation of Low Density Parity Check （LDPC） decoders, due to its high convergence speed. However, the pipeline operation of the layered dec... Abstract： The layered decoding algorithm has been widely used in the implementation of Low Density Parity Check （LDPC） decoders, due to its high convergence speed. However, the pipeline operation of the layered decoder may introduce memory access conflicts, which heavily deteriorates the decoder throughput. To essentially deal with the issue of memory access conflicts, 展开更多
关键词 LDPC codes construction algorithm PEG algorithm layered decoding algorithm memory access conflicts
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Weighted symbol-flipping decoding algorithm for nonbinary LDPC codes with flipping patterns 认领 引用 被引量：4
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作者 Bing Liu Jun Gao +1 位作者 Wei Tao Gaoqi Dou 《Journal of Systems Engineering and Electronics》 SCIE EI CSCD 2011年第5期848-855,共8页
A novel low-complexity weighted symbol-flipping algorithm with flipping patterns to decode nonbinary low-density parity-check codes is proposed. The proposed decoding procedure updates the hard-decision received symbo... A novel low-complexity weighted symbol-flipping algorithm with flipping patterns to decode nonbinary low-density parity-check codes is proposed. The proposed decoding procedure updates the hard-decision received symbol vector iteratively in search of a valid codeword in the symbol vector space. Only one symbol is flipped in each iteration, and symbol flipping function, which is employed as the symbol flipping metric, combines the number of failed checks and the reliabilities of the received bits and calculated symbols. A scheme to avoid infinite loops and select one symbol to flip in high order Galois field search is also proposed. The design of flipping pattern＇s order and depth, which is dependent of the computational requirement and error performance, is also proposed and exemplified. Simulation results show that the algorithm achieves an appealing tradeoff between performance and computational requirement over relatively low Galois field for short to medium code length. 展开更多
关键词 nonbinary low-density parity-check （LDPC） codes quasi-cyclic symbol-flipping （SF） decoding.
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High Hardware Utilization and Low Memory Block Requirement Decoding of QC-LDPC Codes 认领 引用 被引量：1
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作者 ZHAO Ling LIU Rongke +1 位作者 HOU Yi ZHANG Xiaolin 《Chinese Journal of Aeronautics》 SCIE EI CAS CSCD 2012年第5期747-756,共10页
This paper presents a simple yet effective decoding for general quasi-cyclic low-density parity-check （QC-LDPC） codes, which not only achieves high hardware utility efficiency （HUE）, but also brings about great me... This paper presents a simple yet effective decoding for general quasi-cyclic low-density parity-check （QC-LDPC） codes, which not only achieves high hardware utility efficiency （HUE）, but also brings about great memory block reduction without any performance degradation. The main idea is to split the check matrix into several row blocks, then to perform the improved mes- sage passing computations sequentially block by block. As the decoding algorithm improves, the sequential tie between the two-phase computations is broken, so that the two-phase computations can be overlapped which bring in high HUE. Two over- lapping schemes are also presented, each of which suits a different situation. In addition, an efficient memory arrangement scheme is proposed to reduce the great memory block requirement of the LDPC decoder. As an example, for the 0.4 rate LDPC code selected from Chinese Digital TV Terrestrial Broadcasting （DTTB）, our decoding saves over 80% memory blocks com- pared with the conventional decoding, and the decoder achieves 0.97 HUE. Finally, the 0.4 rate LDPC decoder is implemented on an FPGA device EP2S30 （speed grade -5）. Using 8 row processing units, the decoder can achieve a maximum net throughput of 28.5 Mbps at 20 iterations. 展开更多
关键词 wireless communication channel coding low-density parity-check （LDPC） codes decoding hardware utility effi-ciency overlapping
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VARIABLE NON-UNIFORM QUANTIZED BELIEF PROPAGATION ALGORITHM FOR LDPC DECODING 认领 引用 被引量：2
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作者 Liu Binbin Bai Dong Mei Shunliang 《Journal of Electronics(China)》 2008年第4期539-543,共5页
Non-uniform quantization for messages in Low-Density Parity-Check(LDPC)decoding canreduce implementation complexity and mitigate performance loss.But the distribution of messagesvaries in the iterative decoding.This l... Non-uniform quantization for messages in Low-Density Parity-Check(LDPC)decoding canreduce implementation complexity and mitigate performance loss.But the distribution of messagesvaries in the iterative decoding.This letter proposes a variable non-uniform quantized Belief Propaga-tion(BP)algorithm.The BP decoding is analyzed by density evolution with Gaussian approximation.Since the probability density of messages can be well approximated by Gaussian distribution,by theunbiased estimation of variance,the distribution of messages can be tracked during the iteration.Thusthe non-uniform quantization scheme can be optimized to minimize the distortion.Simulation resultsshow that the variable non-uniform quantization scheme can achieve better error rate performance andfaster decoding convergence than the conventional non-uniform quantization and uniform quantizationschemes. 展开更多
关键词 Low-Density Parity-Check （LDPC） codes Iterative decoding Belief Propagation （BP） Non-uniform quantization
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Joint Iterative Decoding for Network-Coding-Based Multisource LDPC-Coded Cooperative MIMO 认领 引用 被引量：1
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作者 张顺外 仰枫帆 唐蕾 《Transactions of Nanjing University of Aeronautics and Astronautics》 EI 2014年第4期420-430,共11页
A network-coding-based multisource LDPC-coded cooperative MIMO scheme is proposed,where multiple sources transmit their messages to the destination with the assistance from a single relay.The relay cooperates with mul... A network-coding-based multisource LDPC-coded cooperative MIMO scheme is proposed,where multiple sources transmit their messages to the destination with the assistance from a single relay.The relay cooperates with multiple sources simultaneously via network-coding.It avoids the issues of imperfect frequencyiming synchronization and large transmission delay which may be introduced by frequency-division multiple access(FDMA)/code-division multiple access(CDMA)and time-division multiple access(TDMA)manners.The proposed joint″Min-Sum″iterative decoding is effectively carried out in the destination.Such a decoding algorithm agrees with the introduced equivalent joint Tanner graph which can be used to fully characterize LDPC codes employed by the sources and relay.Theoretical analysis and numerical simulation show that the proposed scheme with joint iterative decoding can achieve significant cooperation diversity gain.Furthermore,for the relay,compared with the cascade scheme,the proposed scheme has much lower complexity of LDPC-encoding and is easier to be implemented in the hardware with similar bit error rate(BER)performance. 展开更多
关键词 cooperative MIMO network coding LDPC codes equivalent joint Tanner graph joint iterative decoding
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Construction of Rate-Compatible(RC) Low-Density Parity-Check(LDPC) Convolutional Codes Based on RC-LDPC Block Codes 认领 引用 被引量：1
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作者 穆丽伟 韩国军 刘志勇 《Journal of Shanghai Jiaotong university(Science)》 EI 2016年第6期679-683,共5页
In this paper,a family of rate-compatible(RC) low-density parity-check(LDPC) convolutional codes can be obtained from RC-LDPC block codes by graph extension method.The resulted RC-LDPC convolutional codes,which are de... In this paper,a family of rate-compatible(RC) low-density parity-check(LDPC) convolutional codes can be obtained from RC-LDPC block codes by graph extension method.The resulted RC-LDPC convolutional codes,which are derived by permuting the matrices of the corresponding RC-LDPC block codes,are systematic and have maximum encoding memory.Simulation results show that the proposed RC-LDPC convolutional codes with belief propagation(BP) decoding collectively offer a steady improvement on performance compared with the block counterparts over the binary-input additive white Gaussian noise channels(BI-AWGNCs). 展开更多
关键词 rate-compatible(RC) low-density parity-check(LDPC) convolutional codes systematic maximum encoding memory belief propagation(BP) decoding
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Accelerating BP-Based Iterative Low-Density Parity-Check Decoding by Modified Vertical and Horizontal Processes 认领 引用 被引量：2
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作者 陈婧文 仰枫帆 +1 位作者 罗琳 THO Le-Ngoc 《Journal of Southwest Jiaotong University(English Edition)》 2009年第4期275-282,共8页
Two modified BP algorithms related to vertical and horizontal processes are proposed to accelerate iterative low-density parity- check （LDPC） decoding over an additive white Gaussian noise （AWGN） channel, where th... Two modified BP algorithms related to vertical and horizontal processes are proposed to accelerate iterative low-density parity- check （LDPC） decoding over an additive white Gaussian noise （AWGN） channel, where the newly updated extrinsic information is immediately used in the current decoding round. Theoretical analysis and simulation results demonstrate that both the modified approaches provide significant performance improvements over the traditional BP algorithm with almost no additional decoding complexity. The proposed algorithm with modified horizontal process offers even better performance than another algorithm with the modified horizontal process. The two modified BP algorithms are very promising in practical communications since both can achieve an excellent trade-off between the performance and decoding complexity. 展开更多
关键词 LDPC codes Iterative decoding BP algorithm Extrinsic information Horizontal process Vertical process
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JOINT ITERATIVE DECODING FOR SIMPLE-ENCODING SYSTEMATIC IRREGULAR-LDPC-BASED CODED COOPERATION IN NON-IDEAL RELAY CHANNEL 认领 引用 被引量：3
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作者 Chen Jingwen Yang Fengfan +1 位作者 Luo Lin Tho Le-Ngoc 《Journal of Electronics(China)》 2010年第3期305-315,共11页
In this paper, a new kind of simple-encoding irregular systematic LDPC codes suitable for one-relay coded cooperation is designed, where the proposed joint iterative decoding is effectively performed in the destinatio... In this paper, a new kind of simple-encoding irregular systematic LDPC codes suitable for one-relay coded cooperation is designed, where the proposed joint iterative decoding is effectively performed in the destination which is in accordance with the corresponding joint Tanner graph characterizing two different component LDPC codes used by the source and relay in ideal and non-ideal relay cooperations. The theoretical analysis and simulations show that the coded cooperation scheme obviously outperforms the coded non-cooperation one under the same code rate and decoding complex. The significant performance improvement can be virtually credited to the additional mutual exchange of the extrinsic information resulted by the LDPC code employed by the source and its counterpart used by the relay in both ideal and non-ideal cooperations. 展开更多
关键词 Cooperative communication Low-density parity-check code Relay channel Joint Tanner graph Joint iterative decoding
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LDPC Code’s Decoding Algorithms for Wireless Sensor Network:a Brief Review 认领 引用 被引量：1
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作者 Weidong Fang Wuxiong Zhang +2 位作者 Lianhai Shan Biruk Assefa Wei Chen 《Journal of New Media》 2019年第1期45-50,共6页
As an effective error correction technology,the Low Density Parity Check Code(LDPC)has been researched and applied by many scholars.Meanwhile,LDPC codes have some prominent performances,which involves close to the Sha... As an effective error correction technology,the Low Density Parity Check Code(LDPC)has been researched and applied by many scholars.Meanwhile,LDPC codes have some prominent performances,which involves close to the Shannon limit,achieving a higher bit rate and a fast decoding.However,whether these excellent characteristics are suitable for the resource-constrained Wireless Sensor Network(WSN),it seems to be seldom concerned.In this article,we review the LDPC code’s structure brief.ly,and them classify and summarize the LDPC codes’construction and decoding algorithms,finally,analyze the applications of LDPC code for WSN.We believe that our contributions will be able to facilitate the application of LDPC code in WSN. 展开更多
关键词 Wireless Sensor Network(WSN) Low Density Parity Check Code(LDPC) anti-interference soft decision hard decision
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