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Global receptive field transformer decoder method on quantum surface code data and syndrome error correction 认领 引用 被引量：1
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作者 Ao-Qing Li Ce-Wen Tian +2 位作者 Xiao-Xuan Xu Hong-Yang Ma Jun-Qing Liang 《Chinese Physics B》 SCIE EI CAS CSCD 2025年第3期267-276,共10页
Quantum computing has the potential to solve complex problems that are inefficiently handled by classical computation.However,the high sensitivity of qubits to environmental interference and the high error rates in cu... Quantum computing has the potential to solve complex problems that are inefficiently handled by classical computation.However,the high sensitivity of qubits to environmental interference and the high error rates in current quantum devices exceed the error correction thresholds required for effective algorithm execution.Therefore,quantum error correction technology is crucial to achieving reliable quantum computing.In this work,we study a topological surface code with a two-dimensional lattice structure that protects quantum information by introducing redundancy across multiple qubits and using syndrome qubits to detect and correct errors.However,errors can occur not only in data qubits but also in syndrome qubits,and different types of errors may generate the same syndromes,complicating the decoding task and creating a need for more efficient decoding methods.To address this challenge,we used a transformer decoder based on an attention mechanism.By mapping the surface code lattice,the decoder performs a self-attention process on all input syndromes,thereby obtaining a global receptive field.The performance of the decoder was evaluated under a phenomenological error model.Numerical results demonstrate that the decoder achieved a decoding accuracy of 93.8%.Additionally,we obtained decoding thresholds of 5%and 6.05%at maximum code distances of 7 and 9,respectively.These results indicate that the decoder used demonstrates a certain capability in correcting noise errors in surface codes. 展开更多
关键词 quantum error correction surface code transformer decoder
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Neural network-based decoding for bias-tailored quantum codes over quantum channels with asymmetric noise 认领 引用
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作者 Jihao Fan Qianhui Zhang +1 位作者 Zhihua Zhang Jun Li 《Communications in Theoretical Physics》 SCIE CAS CSCD 2025年第12期32-42,共11页
To improve the decoding performance of quantum error-correcting codes in asymmetric noise channels,a neural network-based decoding algorithm for bias-tailored quantum codes is proposed.The algorithm consists of a bias... To improve the decoding performance of quantum error-correcting codes in asymmetric noise channels,a neural network-based decoding algorithm for bias-tailored quantum codes is proposed.The algorithm consists of a biased noise model,a neural belief propagation decoder,a convolutional optimization layer,and a multi-objective loss function.The biased noise model simulates asymmetric error generation,providing a training dataset for decoding.The neural network,leveraging dynamic weight learning and a multi-objective loss function,mitigates error degeneracy.Additionally,the convolutional optimization layer enhances early-stage convergence efficiency.Numerical results show that for bias-tailored quantum codes,our decoder performs much better than the belief propagation(BP)with ordered statistics decoding(BP+OSD).Our decoder achieves an order of magnitude improvement in the error suppression compared to higher-order BP+OSD.Furthermore,the decoding threshold of our decoder for surface codes reaches a high threshold of 20%. 展开更多
关键词 quantum error correction quantum channels asymmetric noise neural networkbased decoding bias-tailored quantum codes
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Determination of quantum toric error correction code threshold using convolutional neural network decoders 认领 引用 被引量：3
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作者 Hao-Wen Wang Yun-Jia Xue +2 位作者 Yu-Lin Ma Nan Hua Hong-Yang Ma 《Chinese Physics B》 SCIE EI CAS CSCD 2022年第1期136-142,共7页
Quantum error correction technology is an important solution to solve the noise interference generated during the operation of quantum computers.In order to find the best syndrome of the stabilizer code in quantum err... Quantum error correction technology is an important solution to solve the noise interference generated during the operation of quantum computers.In order to find the best syndrome of the stabilizer code in quantum error correction,we need to find a fast and close to the optimal threshold decoder.In this work,we build a convolutional neural network(CNN)decoder to correct errors in the toric code based on the system research of machine learning.We analyze and optimize various conditions that affect CNN,and use the RestNet network architecture to reduce the running time.It is shortened by 30%-40%,and we finally design an optimized algorithm for CNN decoder.In this way,the threshold accuracy of the neural network decoder is made to reach 10.8%,which is closer to the optimal threshold of about 11%.The previous threshold of 8.9%-10.3%has been slightly improved,and there is no need to verify the basic noise. 展开更多
关键词 quantum error correction toric code convolutional neural network(CNN)decoder
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High Speed Versatile Reed-Solomon Decoder for Correcting Errors and Erasures 认领 引用
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作者 王华 范光荣 +1 位作者 王平勤 匡镜明 《Journal of Beijing Institute of Technology》 EI CAS 2008年第1期81-86,共6页
A new Chien search method for shortened Reed-Solomon （RS） code is proposed, based on this, a versatile RS decoder for correcting both errors and erasures is designed. Compared with the traditional RS decoder, the we... A new Chien search method for shortened Reed-Solomon （RS） code is proposed, based on this, a versatile RS decoder for correcting both errors and erasures is designed. Compared with the traditional RS decoder, the weighted coefficient of the Chien search method is calculated sequentially through the three pipelined stages of the decoder. And therefore, the computation of the errata locator polynomial and errata evaluator polynomial needs to be modified. The versatile RS decoder with minimum distance 21 has been synthesized in the Xilinx Virtex-Ⅱ series field programmable gate array （FPGA） xe2v1000-5 and is used by coneatenated coding system for satellite communication. Results show that the maximum data processing rate can be up to 1.3 Gbit/s. 展开更多
关键词 Reed-Solomon code Berlekamp-Massey algorithm error correction codes versatile Reed-Solomon decoder
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A Steady-State Errors Correction Method for Eliminating Measurement Errors 认领 引用
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作者 田新良 杨苹 《Journal of Donghua University(English Edition)》 EI CAS 2013年第4期298-304,共7页
This paper proposes a steady-state errors correction(SSEC)method for eliminating measurement errors.This method is based on the detections of error signal E(s)and output C(s)which generate an expected output R(s).In c... This paper proposes a steady-state errors correction(SSEC)method for eliminating measurement errors.This method is based on the detections of error signal E(s)and output C(s)which generate an expected output R(s).In comparison with the conventional solutions which are based on detecting the expected output R(s)and output C(s)to obtain error signal E(s),the measurement errors are eliminated even the error might be at a significant level.Moreover,it is possible that the individual debugging by regulating the coefficient K for every member of the multiple objectives achieves the optimization of the open loop gain.Therefore,this simple method can be applied to the weak coupling and multiple objectives system,which is usually controlled by complex controller.The principle of eliminating measurement errors is derived analytically,and the advantages comparing with the conventional solutions are depicted.Based on the SSEC method analysis,an application of this method for an active power filter(APF)is investigated and the effectiveness and viability of the scheme are demonstrated through the simulation and experimental verifications. 展开更多
关键词 measurement errors steady-state errors correction （SSEC） active power filters （APF）CLC number：TM77Document code：AArticle ID：1672-5220（2013）04-0298-07
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Jointly-check iterative decoding algorithm for quantum sparse graph codes 认领 引用 被引量：2
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作者 邵军虎 白宝明 +1 位作者 林伟 周林 《Chinese Physics B》 SCIE EI CAS 2010年第8期116-122,共7页
For quantum sparse graph codes with stabilizer formalism, the unavoidable girth-four cycles in their Tanner graphs greatly degrade the iterative decoding performance with standard belief-propagation （BP） algorithm. ... For quantum sparse graph codes with stabilizer formalism, the unavoidable girth-four cycles in their Tanner graphs greatly degrade the iterative decoding performance with standard belief-propagation （BP） algorithm. In this paper, we present a jointly-check iterative algorithm suitable for decoding quantum sparse graph codes efficiently. Numerical simulations show that this modified method outperforms standard BP algorithm with an obvious performance improvement. 展开更多
关键词 quantum error correction sparse graph code iterative decoding belief-propagation algorithm
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多因子搜索的置信传播-顺序统计译码算法 认领 引用
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作者 毕胜 梁济凡 +4 位作者 王千帆 宋林琦 李绿周 马啸 李立浧 《量子电子学报》 CAS CSCD 北大核心 2026年第4期564-576,共13页
针对传统标准量子纠错码中置信传播-顺序统计译码(BP-OSD)在单一归一化因子下搜索空间受限、易陷入局部最优而影响性能的问题,本文提出一种两阶段多因子搜索BP-OSD算法。在第一阶段,针对一组候选归一化因子运行归一化最小和(NMS)算法并... 针对传统标准量子纠错码中置信传播-顺序统计译码(BP-OSD)在单一归一化因子下搜索空间受限、易陷入局部最优而影响性能的问题,本文提出一种两阶段多因子搜索BP-OSD算法。在第一阶段,针对一组候选归一化因子运行归一化最小和(NMS)算法并进行伴随式校验,若存在与测得伴随式一致的译码结果,则停止所有译码并直接输出,若无一致解,则进入第二阶段。在第二阶段,依据最可靠基可靠性度量,从由M个候选归一化因子产生的M组软输出中,选取前M'(≤M)组最可靠的软输出来执行OSD,再根据错误图样Hamming重量最小准则来确定最终译码结果。该方案以“少量BP+少量OSD”有效扩大了探索范围,同时避免大量OSD带来的复杂度与时延开销。数值实验表明:1)在Surface码场景中,该方法在整个物理错误率范围内均优于最小权完美匹配与传统BP译码器,能够明显降低逻辑错误发生概率,并将容错阈值从约15.5%提升至约16.7%;2)在量子低密度奇偶校验码上,相较于原始BP及标准BP-OSD,该方案仍能带来显著性能增益,使逻辑错误率降低约一个数量级。 展开更多
关键词 量子纠错 Surface码 量子低密度奇偶校验码 置信传播-顺序统计译码算法
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参数列表化置信传播-顺序统计译码算法 认领 引用 被引量：4
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作者 梁济凡 王千帆 +2 位作者 宋林琦 李绿周 马啸 《电子与信息学报》 EI CAS CSCD 北大核心 2025年第11期4254-4263,共10页
针对量子纠错码中置信传播-顺序统计译码(BP-OSD)在单一归一化因子下搜索空间受限、易陷入局部最优而影响性能的问题,该文提出一种兼顾复杂度且提升译码性能的改进方案。所提增强型BP-OSD算法的核心思想是在前处理BP译码阶段对归一化因... 针对量子纠错码中置信传播-顺序统计译码(BP-OSD)在单一归一化因子下搜索空间受限、易陷入局部最优而影响性能的问题,该文提出一种兼顾复杂度且提升译码性能的改进方案。所提增强型BP-OSD算法的核心思想是在前处理BP译码阶段对归一化因子α进行列表化。与传统算法仅采用单一α值不同,所提方法针对多个α取值分别执行BP译码,并对每个取值下得到的后验概率利用OSD算法进行后处理,形成候选列表,最终选取最似然结果作为译码输出。为降低计算复杂度,该文仅在第1阶段BP译码失败时才触发参数列表化BP-OSD算法,并进一步对所提算法复杂度进行了理论分析与数值验证。结果显示,所提方案在低物理错误率区域与BP译码具有相似的复杂度。在实验方面,该文通过蒙特卡罗仿真对主流Surface码和量子低密度一致校验(QLDPC)码进行了性能评估。数值结果表明:(1)对于Surface码,所提方法相较于最小权重完美匹配(MWPM)算法和原始BP算法,可明显降低逻辑比特错误率并提升阈值(从MWPM的约15.5%提升至约18.3%);(2)对于QLDPC码,所提方法较原始BP和原始BP-OSD算法可显著提高译码性能,降低逻辑错误率。 展开更多
关键词 量子纠错 Surface码 量子低密度一致校验(QLDPC)码 置信传播-顺序统计译码(BP-OSD)算法
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FEC-ABP:一种自适应降低HPC互连网络数据传输时延的方法 认领 引用 被引量：3
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作者 曹继军 王耀慧 +1 位作者 罗章 孔德永 《计算机工程》 CAS CSCD 北大核心 2025年第11期194-203,共10页
为了降低高性能计算(HPC)互连网络的数据传输延迟,通常在物理编码子层(PCS)采用可配置旁路纠错方法,但是存在难以适应物理介质误码变化性、难以适应链路层报文与编码子层前向纠错(FEC)块的粒度差异性等问题。为此,提出一种自适应旁路FE... 为了降低高性能计算(HPC)互连网络的数据传输延迟,通常在物理编码子层(PCS)采用可配置旁路纠错方法,但是存在难以适应物理介质误码变化性、难以适应链路层报文与编码子层前向纠错(FEC)块的粒度差异性等问题。为此,提出一种自适应旁路FEC解码过程的方法FEC-ABP。FEC-ABP优化接收端数据处理过程,使得经过通道锁定和重定序的数据复制为两路,子流程A数据经过完整的FEC解码及后续处理(即删除对齐标记和校验码、解扰、257/264解码、66/64解码和速率匹配)进入链路层,而子流程B数据完全旁路FEC解码,只经过后续处理进入链路层。链路层并行处理两路数据,根据各路报文携带的循环冗余校验码(CRC)和序列号判定接收哪路报文,并采用Go-back-N机制负责不可纠错报文的重传。基于FEC-ABP方法,无差错报文传输可以获得旁路FEC解码带来的低延迟性能,而可纠错报文传输可以获得FEC解码纠错带来的可靠性。实验结果表明,FEC-ABP方法以较低的资源消耗代价获取了较好的数据平均传输延迟优化效果,这对于实现HPC互连网络的较低延迟数据传输具有重要作用。 展开更多
关键词 互连网络 前向纠错编码 Go-back-N重传机制 旁路解码 低延迟
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Quaternion Integers Based Higher Length Cyclic Codes and Their Decoding Algorithm 认领 引用 被引量：2
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作者 Muhammad Sajjad Tariq Shah +2 位作者 Mohammad Mazyad Hazzazi Adel R.Alharbi Iqtadar Hussain 《Computers, Materials & Continua》 SCIE EI 2022年第10期1177-1194,共18页
The decoding algorithm for the correction of errors of arbitrary Mannheim weight has discussed for Lattice constellations and codes from quadratic number fields.Following these lines,the decoding algorithms for the co... The decoding algorithm for the correction of errors of arbitrary Mannheim weight has discussed for Lattice constellations and codes from quadratic number fields.Following these lines,the decoding algorithms for the correction of errors of n=p−12 length cyclic codes(C)over quaternion integers of Quaternion Mannheim(QM)weight one up to two coordinates have considered.In continuation,the case of cyclic codes of lengths n=p−12 and 2n−1=p−2 has studied to improve the error correction efficiency.In this study,we present the decoding of cyclic codes of length n=ϕ(p)=p−1 and length 2n−1=2ϕ(p)−1=2p−3(where p is prime integer andϕis Euler phi function)over Hamilton Quaternion integers of Quaternion Mannheim weight for the correction of errors.Furthermore,the error correction capability and code rate tradeoff of these codes are also discussed.Thus,an increase in the length of the cyclic code is achieved along with its better code rate and an adequate error correction capability. 展开更多
关键词 Mannheim distance monoid ring cyclic codes parity check matrix extension syndromes decoding code rate and error correction capability
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Efficient Information Set Decoding Based on Genetic Algorithms 认领 引用 被引量：1
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作者 Ahmed Azouaoui Idriss Chana Mostafa Belkasmi 《International Journal of Communications, Network and System Sciences》 2012年第7期423-429,共7页
In this paper, we describe a hard-decision decoding technique based on Genetic Algorithms (HDGA), which is applicable to the general case of error correcting codes where the only known structure is given by the genera... In this paper, we describe a hard-decision decoding technique based on Genetic Algorithms (HDGA), which is applicable to the general case of error correcting codes where the only known structure is given by the generating matrix G. Then we present a new soft-decision decoding based on HDGA and the Chase algorithm (SDGA). The performance of some binary and non-binary Linear Block Codes are given for HDGA and SDGA over Gaussian and Rayleigh channels. The performances show that the HDGA decoder has the same performances as the Berlekamp-Massey Algorithm (BMA) in various transmission channels. On the other hand, the performances of SDGA are equivalent to soft-decision decoding using Chase algorithm and BMA (Chase-BMA). The complexity of decoders proposed is also discussed and compared to those of other decoders. 展开更多
关键词 Genetic Algorithms (GA) Error Correcting Codes RS Codes Information Set Decoding Chase Algorithm
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Majority Voting Procedure Allowing Soft Decision Decoding of Linear Block Codes on Binary Channels 认领 引用
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作者 Said Nouh Achraf El Khatabi Mostafa Belkasmi 《International Journal of Communications, Network and System Sciences》 2012年第9期557-568,共12页
In this paper we present an efficient algorithm to decode linear block codes on binary channels. The main idea consists in using a vote procedure in order to elaborate artificial reliabilities of the binary received w... In this paper we present an efficient algorithm to decode linear block codes on binary channels. The main idea consists in using a vote procedure in order to elaborate artificial reliabilities of the binary received word and to present the obtained real vector r as inputs of a SIHO decoder (Soft In/Hard Out). The goal of the latter is to try to find the closest codeword to r in terms of the Euclidean distance. A comparison of the proposed algorithm over the AWGN channel with the Majority logic decoder, Berlekamp-Massey, Bit Flipping, Hartman-Rudolf algorithms and others show that it is more efficient in terms of performance. The complexity of the proposed decoder depends on the weight of the error to decode, on the code structure and also on the used SIHO decoder. 展开更多
关键词 Error Correcting Codes Genetic Algorithms HIHO Decoder SIHO Decoder Vote Procedure
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一种基于改进的U-Net-LSTM的ADS-B优化解码算法 认领 引用
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作者 杨勇承 高勇 《通信技术》 2025年第12期1310-1317,共8页
随着航空运输规模的扩大与星基广播式自动相关监视(ADS-B)通信技术的应用,ADS-B系统在复杂电磁环境中面临信号失真与解码失败的挑战。传统降噪方法因参数选择复杂、非平稳噪声处理能力有限,难以满足低SNR场景需求。因此,提出了一种改进... 随着航空运输规模的扩大与星基广播式自动相关监视(ADS-B)通信技术的应用,ADS-B系统在复杂电磁环境中面临信号失真与解码失败的挑战。传统降噪方法因参数选择复杂、非平稳噪声处理能力有限,难以满足低SNR场景需求。因此,提出了一种改进型轻量化U-Net-LSTM-KF网络用于ADS-B处理。该网络融合空间特征提取(U-Net)、时序建模(LSTM)与动态噪声抑制(卡尔曼滤波),通过联合特征前导检测提升脉冲定位精度,并设计自适应惩罚损失函数以优化比特位级错误修正。实验表明,该网络在处理带噪的实采信号(信噪比SNR=-5 dB)时纠错后译码准确率达73%,较传统波形检测法(35.25%)有了显著提升,且网络结构经过轻量化改进,相比U-Net-LSTM网络参数量减少35.7%,推理时延降低40%,为高动态航空监视提供了高效解决方案。 展开更多
关键词 ADS-B信号 神经网络 自适应纠错 低SNR译码 空间特征提取 航空监视
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面向高可靠低时延通信的顺序统计译码(OSD)关键技术综述 认领 引用
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作者 王千帆 郭延庚 +3 位作者 毕胜 王义文 宋林琦 马啸 《电子学报》 EI CAS CSCD 北大核心 2026年第1期466-478,共13页
高可靠低时延通信(Ultra-Reliable Low-Latency Communication,URLLC)是5G的三大核心场景之一,其增强版本极高可靠极低时延通信(Hyper-Reliable Low-Latency Communication,HRLLC)场景也已成为6G六大场景之一。高可靠低时延类通信场景... 高可靠低时延通信(Ultra-Reliable Low-Latency Communication,URLLC)是5G的三大核心场景之一,其增强版本极高可靠极低时延通信(Hyper-Reliable Low-Latency Communication,HRLLC)场景也已成为6G六大场景之一。高可靠低时延类通信场景对传输时延与可靠性提出了极致要求,这为短码编译码技术带来了新的机遇与挑战。顺序统计译码(Ordered Statistics Decoding,OSD)是一种近似最大似然(Near-Maximum-Likelihood,Near-ML)译码性能的通用短码译码算法,其在该类场景中具有重要潜力,但过高的计算复杂度严重制约了OSD算法的实际应用。本文系统综述了OSD算法中测试错误模式(Test Error Pattern,TEP)在测试顺序、跳过机制与提前终止策略等方面的代表性成果和最新研究进展,并对未来潜在研究方向进行了总结展望。具体地,首先讨论了汉明重量顺序、软重量顺序及基于有序可靠位的逻辑重量顺序对译码性能与复杂度的影响,指出逻辑权重顺序可以获得可靠性和实现复杂度间的有效折中。其次,分类总结了几种跳过与终止机制,阐明其基本思想是通过动态软信息判断或概率决策来降低冗余重编码次数。进一步,重点探讨了基于软度量和基于额外校验的TEP生成、跳过、终止机制及其联合设计,表明此类方法通过结构性约束与混合判断策略,在几乎不损失误帧率的前提下,将平均重编码次数降低1~2个数量级。数值结果显示,对于BCH(Bose-Chaudhuri-Hocquenghem)码[127,64],联合跳过机制在信噪比为4 dB处仅需十余次重编码,较原始OSD可减少超过90%的计算开销。最后,本文指出OSD在非二进制编码、时变信道适应性及硬件实现等方面仍面临挑战,尤其是对于码长更长的中码率区域,并展望了针对OSD算法的未来研究方向。 展开更多
关键词 纠错码 顺序统计译码 测试顺序 跳过机制 终止机制
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基于早期终止解码器的高效小型化PUF 认领 引用
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作者 孟坤 许嘉鑫 王启源 《计算机工程与设计》 北大核心 2026年第2期459-465,共7页
信息安全在现代社会中至关重要,物理不可克隆函数(PUF)为密钥生成与管理提供了解决途径,而SRAM PUF因其易于集成和使用而受到青睐。因此利用独立SRAM芯片作为PUF单元,分析了基于模糊提取器的密钥提取方法,结合BCH编码和奇偶校验码,提出... 信息安全在现代社会中至关重要,物理不可克隆函数(PUF)为密钥生成与管理提供了解决途径,而SRAM PUF因其易于集成和使用而受到青睐。因此利用独立SRAM芯片作为PUF单元,分析了基于模糊提取器的密钥提取方法,结合BCH编码和奇偶校验码,提出了优化的BCH码Meggitt解码器的早期终止方法,并设计了一款小型SRAM PUF设备,结合HMAC技术实现了多挑战应答功能。实验结果表明,所设计的SRAM PUF设备性能优异,片内汉明权重为0.5185%,片间汉明距离为48.4075%。在常温下失败低于4.3×10-7,优化后的早期终止纠错方法使解码速度提升了10.10%,显著增强了设备的实际应用能力。 展开更多
关键词 信息安全 物理不可克隆函数 静态随机存取存储器 模糊提取器 纠错码 解码器 奇偶校验码
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复杂电磁环境下纠错译码算法优化与应用 认领 引用
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作者 潘兆马 杨学锋 石渊 《计算机仿真》 2026年第6期293-297,共5页
传统的译码在铁路复杂的电磁干扰环境下往往表现不佳,信号也容易受小尺度衰落、器件电子噪声和干扰影响。针对上述问题,提出了一种考虑干扰特性的信道解码框架。框架猜测随机加性噪声译码基础上,利用了有序可靠性比特猜测随机加性噪的框... 传统的译码在铁路复杂的电磁干扰环境下往往表现不佳,信号也容易受小尺度衰落、器件电子噪声和干扰影响。针对上述问题,提出了一种考虑干扰特性的信道解码框架。框架猜测随机加性噪声译码基础上,利用了有序可靠性比特猜测随机加性噪的框架,涵盖了接收端α稳定噪声统计特性已知和未知的两种情况,并通过加入对数似然比来得到更好的效果。以上优化显著提升了译码在铁路环境中的可靠性和及时性。实践验证表明,所提解码方法在实际铁路的应用中表现出良好的效果,最终形成了一种适用于铁路复杂电磁环境的可靠纠错译码算法。 展开更多
关键词 纠错译码 稳定分布 猜测随机加型噪声解码
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加权解码在解决纠错输出编码Consistent-Diverse平衡问题的应用 认领 引用 被引量：8
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作者 周进登 王晓丹 +2 位作者 权文 许燕 姚旭 《电子学报》 EI CAS CSCD 北大核心 2011年第7期1514-1522,共9页
纠错输出编码作为解决多类分类问题的通用集成框架,能有效的把多类问题分解为二类问题从而使问题得以简化.然而在生成基分类器的过程中,经常面临提高基分类器之间的差异性和增加各基分类器与集成分类器学习的一致性的矛盾,称之为consist... 纠错输出编码作为解决多类分类问题的通用集成框架,能有效的把多类问题分解为二类问题从而使问题得以简化.然而在生成基分类器的过程中,经常面临提高基分类器之间的差异性和增加各基分类器与集成分类器学习的一致性的矛盾,称之为consistent-diverse平衡问题.在保证差异性的前提下减小由学习不一致性引起的分类错误率是解决该平衡问题的一个出发点,在此利用加权解码,通过对加权系数矩阵的再学习进而减弱和消除由基分类器学习不一致性产生的误差.实验利用人工数据集和UCI数据集分别加以验证,结果表明以集成分类器的分类错误率为适应度函数的遗传算法搜索出的最优加权系数矩阵相比其它方法产生的系数矩阵在解决consistent-diverse平衡问题更具有优越性. 展开更多
关键词 纠错输出码 多类分类 加权解码 遗传算法
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Construction of type-ⅡQC-LDPC codes with fast encoding based on perfect cyclic difference sets 认领 引用 被引量：2
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作者 LI Ling-xiang LI Hai-bing +1 位作者 LI Ji-bi JIANG Hua 《Optoelectronics Letters》 EI 2017年第5期358-362,共5页
In view of the problems that the encoding complexity of quasi-cyclic low-density parity-check(QC-LDPC)codes is high and the minimum distance is not large enough which leads to the degradation of the error-correction p... In view of the problems that the encoding complexity of quasi-cyclic low-density parity-check(QC-LDPC)codes is high and the minimum distance is not large enough which leads to the degradation of the error-correction performance,the new irregular type-ⅡQC-LDPC codes based on perfect cyclic difference sets(CDSs)are constructed.The parity check matrices of these type-ⅡQC-LDPC codes consist of the zero matrices with weight of 0,the circulant permutation matrices(CPMs)with weight of 1 and the circulant matrices with weight of 2(W2CMs).The introduction of W2CMs in parity check matrices makes it possible to achieve the larger minimum distance which can improve the error-correction performance of the codes.The Tanner graphs of these codes have no girth-4,thus they have the excellent decoding convergence characteristics.In addition,because the parity check matrices have the quasi-dual diagonal structure,the fast encoding algorithm can reduce the encoding complexity effectively.Simulation results show that the new type-ⅡQC-LDPC codes can achieve a more excellent error-correction performance and have no error floor phenomenon over the additive white Gaussian noise(AWGN)channel with sum-product algorithm(SPA)iterative decoding. 展开更多
关键词 Convolutional codes Encoding(symbols) Error correction Errors Gaussian noise(electronic) Iterative decoding Iterative methods Matrix algebra Satellite communication systems Set theory Signal encoding Turbo codes White noise
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高数据吞吐率Reed-Solomon解码器 认领 引用
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作者 章杰 江南 《计算机应用》 北大核心 2008年第10期2696-2700,共5页
提出了一种新型的高数据吞吐率RS解码器,它采用无除法Berlekamp-Massey,Chien和Forney等算法实现。该解码器采用一种新型的结构化复接流水线结构,具有很高的效率和突出的吞吐能力。根据设计实现的解码器性能,该解码器相比现有的解码器... 提出了一种新型的高数据吞吐率RS解码器,它采用无除法Berlekamp-Massey,Chien和Forney等算法实现。该解码器采用一种新型的结构化复接流水线结构,具有很高的效率和突出的吞吐能力。根据设计实现的解码器性能,该解码器相比现有的解码器具有显著的吞吐率增益。 展开更多
关键词 信道编码 纠错编码 理德-所罗门码 解码器 吞吐率 代数解码 流水线
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一种适用于R-S不等保护码的编译码算法 认领 引用
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作者 毛倩 曾小清 张树京 《计算机工程与应用》 北大核心 2007年第7期6-9,共4页
以R-S不等保护码为研究对象,在分析码空间特性的基础上,着重研究编译码算法。编码时,利用分离最小理想的方法构造出信息元距离的不均匀性。译码时,如果接收码字中错误码元的数目小于或等于码空间的最低保护能力,则利用一般译码算法译码... 以R-S不等保护码为研究对象,在分析码空间特性的基础上,着重研究编译码算法。编码时,利用分离最小理想的方法构造出信息元距离的不均匀性。译码时,如果接收码字中错误码元的数目小于或等于码空间的最低保护能力,则利用一般译码算法译码;否则对高保护等级信息元的值进行假设,并利用低保护等级的子空间验证该假设,用试探法找到满足验证条件的高保护等级信息元的值。仿真显示,该编译码算法对R-S不等保护码是有效的,它可以在不改变编码效率的前提下为高保护等级的信息元提供更好的误码性能。 展开更多
关键词 纠错码 R—S不等保护码 译码算法
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