期刊文献+
共找到1,059篇文章
< 1 2 53 >
每页显示 20 50 100
Single Photon Detection Technology in Underwater Wireless Optical Communication:Modulation Modes and Error Correction Coding Analysis
1
作者 GAI Lei LI Wendong WANG Guoyu 《Journal of Ocean University of China》 CAS CSCD 2024年第2期405-414,共10页
This study explores the application of single photon detection(SPD)technology in underwater wireless optical communication(UWOC)and analyzes the influence of different modulation modes and error correction coding type... This study explores the application of single photon detection(SPD)technology in underwater wireless optical communication(UWOC)and analyzes the influence of different modulation modes and error correction coding types on communication performance.The study investigates the impact of on-off keying(OOK)and 2-pulse-position modulation(2-PPM)on the bit error rate(BER)in single-channel intensity and polarization multiplexing.Furthermore,it compares the error correction performance of low-density parity check(LDPC)and Reed-Solomon(RS)codes across different error correction coding types.The effects of unscattered photon ratio and depolarization ratio on BER are also verified.Finally,a UWOC system based on SPD is constructed,achieving 14.58 Mbps with polarization OOK multiplexing modulation and 4.37 Mbps with polarization 2-PPM multiplexing modulation using LDPC code error correction. 展开更多
关键词 error correction coding modulation mode single photon detection underwater communication wireless optical communication
下载PDF
Quantum Codes Do Not Increase Fidelity against Isotropic Errors
2
作者 Jesús Lacalle Luis Miguel Pozo-Coronado +1 位作者 André Luiz Fonseca de Oliveira Rafael Martín-Cuevas 《Journal of Applied Mathematics and Physics》 2023年第2期555-571,共17页
In this article, we study the ability of error-correcting quantum codes to increase the fidelity of quantum states throughout a quantum computation. We analyze arbitrary quantum codes that encode all qubits involved i... In this article, we study the ability of error-correcting quantum codes to increase the fidelity of quantum states throughout a quantum computation. We analyze arbitrary quantum codes that encode all qubits involved in the computation, and we study the evolution of n-qubit fidelity from the end of one application of the correcting circuit to the end of the next application. We assume that the correcting circuit does not introduce new errors, that it does not increase the execution time (i.e. its application takes zero seconds) and that quantum errors are isotropic. We show that the quantum code increases the fidelity of the states perturbed by quantum errors but that this improvement is not enough to justify the use of quantum codes. Namely, we prove that, taking into account that the time interval between the application of the two corrections is multiplied (at least) by the number of qubits n (due to the coding), the best option is not to use quantum codes, since the fidelity of the uncoded state over a time interval n times smaller is greater than that of the state resulting from the quantum code correction. 展开更多
关键词 Quantum error correcting codes Isotropic Quantum Computing errors Quantum Computing error Fidelity Quantum Computing error Variance
下载PDF
Performance analysis and design of MIMO-OFDM system using concatenated forward error correction codes 被引量:3
3
作者 Arun Agarwal Saurabh N.Mehta 《Journal of Central South University》 SCIE EI CAS CSCD 2017年第6期1322-1343,共22页
This work investigates the performance of various forward error correction codes, by which the MIMO-OFDM system is deployed. To ensure fair investigation, the performance of four modulations, namely, binary phase shif... This work investigates the performance of various forward error correction codes, by which the MIMO-OFDM system is deployed. To ensure fair investigation, the performance of four modulations, namely, binary phase shift keying(BPSK), quadrature phase shift keying(QPSK), quadrature amplitude modulation(QAM)-16 and QAM-64 with four error correction codes(convolutional code(CC), Reed-Solomon code(RSC)+CC, low density parity check(LDPC)+CC, Turbo+CC) is studied under three channel models(additive white Guassian noise(AWGN), Rayleigh, Rician) and three different antenna configurations(2×2, 2×4, 4×4). The bit error rate(BER) and the peak signal to noise ratio(PSNR) are taken as the measures of performance. The binary data and the color image data are transmitted and the graphs are plotted for various modulations with different channels and error correction codes. Analysis on the performance measures confirm that the Turbo + CC code in 4×4 configurations exhibits better performance. 展开更多
关键词 bit error rate (BER) convolutional code (CC) forward error correction peak signal to noise ratio (PSNR) Turbo code
下载PDF
A Comparison of Error Correction Models for Student’s Error Codes Based on Deep Learning 被引量:1
4
作者 Tao Lin Jian Wang +2 位作者 Qifan Jian Zhiming Wu Zhenbo Zhang 《计算机教育》 2022年第12期137-142,共6页
Automatically correcting students’code errors using deep learning is an effective way to reduce the burden of teachers and to enhance the effects of students’learning.However,code errors vary greatly,and the adaptab... Automatically correcting students’code errors using deep learning is an effective way to reduce the burden of teachers and to enhance the effects of students’learning.However,code errors vary greatly,and the adaptability of fixing techniques may vary for different types of code errors.How to choose the appropriate methods to fix different types of errors is still an unsolved problem.To this end,this paper first classifies code errors by Java novice programmers based on Delphi analysis,and compares the effectiveness of different deep learning models(CuBERT,GraphCodeBERT and GGNN)fixing different types of errors.The results indicated that the 3 models differed significantly in their classification accuracy on different error codes,while the error correction model based on the Bert structure showed better code correction potential for beginners’codes. 展开更多
关键词 Deep learning code error correction code error classification
下载PDF
Message Authentication Scheme Based on Quantum Error-correction Codes 被引量:1
5
作者 Ying Guo Guihua Zeng Yun Mao 《通讯和计算机(中英文版)》 2006年第7期36-39,共4页
关键词 美国昆腾公司 技术鉴定 编译程序 技术创新
下载PDF
High Speed Versatile Reed-Solomon Decoder for Correcting Errors and Erasures
6
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
下载PDF
Toward Constructing a Continuous Logical Operator for Error-Corrected Quantum Sensing
7
作者 Cameron Cianci 《Journal of Quantum Information Science》 2023年第2期45-55,共11页
Error correction has long been suggested to extend the sensitivity of quantum sensors into the Heisenberg Limit. However, operations on logical qubits are only performed through universal gate sets consisting of finit... Error correction has long been suggested to extend the sensitivity of quantum sensors into the Heisenberg Limit. However, operations on logical qubits are only performed through universal gate sets consisting of finite-sized gates such as Clifford + T. Although these logical gate sets allow for universal quantum computation, the finite gate sizes present a problem for quantum sensing, since in sensing protocols, such as the Ramsey measurement protocol, the signal must act continuously. The difficulty in constructing a continuous logical op-erator comes from the Eastin-Knill theorem, which prevents a continuous sig-nal from being both fault-tolerant to local errors and transverse. Since error correction is needed to approach the Heisenberg Limit in a noisy environment, it is important to explore how to construct fault-tolerant continuous operators. In this paper, a protocol to design continuous logical z-rotations is proposed and applied to the Steane Code. The fault tolerance of the designed operator is investigated using the Knill-Laflamme conditions. The Knill-Laflamme condi-tions indicate that the diagonal unitary operator constructed cannot be fault tolerant solely due to the possibilities of X errors on the middle qubit. The ap-proach demonstrated throughout this paper may, however, find success in codes with more qubits such as the Shor code, distance 3 surface code, [15, 1, 3] code, or codes with a larger distance such as the [11, 1, 5] code. 展开更多
关键词 Quantum Sensing Quantum error correction Steane code Heisenberg Limit
下载PDF
USING ERROR-CORRECTING ENCODERS TO DESIGN LOCAL-RANDOM SEQUENCE GENERATORS
8
作者 杨义先 《Journal of Electronics(China)》 1995年第1期9-14,共6页
This paper proved the statement that a good linear block encoder is in fact a good local-random sequence generator. Furthermore, this statement discovers the deep relationship between the error-correcting coding theor... This paper proved the statement that a good linear block encoder is in fact a good local-random sequence generator. Furthermore, this statement discovers the deep relationship between the error-correcting coding theory and the modern cryptography. 展开更多
关键词 error-correcting CODING CRYPTOGRAPHY RANDOM SEQUENCES
下载PDF
Effectiveness and failure modes of error correcting code in industrial 65 nm CMOS SRAMs exposed to heavy ions
9
作者 童腾 王晓辉 +4 位作者 张战刚 丁朋程 刘杰 刘天奇 苏弘 《Nuclear Science and Techniques》 SCIE CAS CSCD 2014年第1期47-52,共6页
Single event upsets(SEUs) induced by heavy ions were observed in 65 nm SRAMs to quantitatively evaluate the applicability and effectiveness of single-bit error correcting code(ECC) utilizing Hamming Code.The results s... Single event upsets(SEUs) induced by heavy ions were observed in 65 nm SRAMs to quantitatively evaluate the applicability and effectiveness of single-bit error correcting code(ECC) utilizing Hamming Code.The results show that the ECC did improve the performance dramatically,with the SEU cross sections of SRAMs with ECC being at the order of 10^(-11) cm^2/bit,two orders of magnitude higher than that without ECC(at the order of 10^(-9) cm^2/bit).Also,ineffectiveness of ECC module,including 1-,2- and 3-bits errors in single word(not Multiple Bit Upsets),was detected.The ECC modules in SRAMs utilizing(12,8) Hamming code would lose work when 2-bits upset accumulates in one codeword.Finally,the probabilities of failure modes involving 1-,2- and 3-bits errors,were calcaulated at 39.39%,37.88%and 22.73%,respectively,which agree well with the experimental results. 展开更多
关键词 SRAM 重离子 CMOS 故障模式 纳米 纠错码 工业 ECC
下载PDF
Quantum secret sharing based on quantum error-correcting codes
10
作者 张祖荣 刘伟涛 李承祖 《Chinese Physics B》 SCIE EI CAS CSCD 2011年第5期91-95,共5页
Quantum secret sharing(QSS) is a procedure of sharing classical information or quantum information by using quantum states. This paper presents how to use a [2k- 1, 1, k] quantum error-correcting code (QECC) to im... Quantum secret sharing(QSS) is a procedure of sharing classical information or quantum information by using quantum states. This paper presents how to use a [2k- 1, 1, k] quantum error-correcting code (QECC) to implement a quantum (k, 2k-1) threshold scheme. It also takes advantage of classical enhancement of the [2k-1, 1, k] QECC to establish a QSS scheme which can share classical information and quantum information simultaneously. Because information is encoded into QECC, these schemes can prevent intercept-resend attacks and be implemented on some noisy channels. 展开更多
关键词 quantum secret sharing quantum error-correcting code classically enhanced quantumerror-correcting code
原文传递
Spatial Image Watermarking by Error-Correction Coding in Gray Codes
11
作者 Tadahiko Kimoto 《Journal of Signal and Information Processing》 2013年第3期259-273,共15页
In this paper, error-correction coding (ECC) in Gray codes is considered and its performance in the protecting of spatial image watermarks against lossy data compression is demonstrated. For this purpose, the differen... In this paper, error-correction coding (ECC) in Gray codes is considered and its performance in the protecting of spatial image watermarks against lossy data compression is demonstrated. For this purpose, the differences between bit patterns of two Gray codewords are analyzed in detail. On the basis of the properties, a method for encoding watermark bits in the Gray codewords that represent signal levels by a single-error-correcting (SEC) code is developed, which is referred to as the Gray-ECC method in this paper. The two codewords of the SEC code corresponding to respective watermark bits are determined so as to minimize the expected amount of distortion caused by the watermark embedding. The stochastic analyses show that an error-correcting capacity of the Gray-ECC method is superior to that of the ECC in natural binary codes for changes in signal codewords. Experiments of the Gray-ECC method were conducted on 8-bit monochrome images to evaluate both the features of watermarked images and the performance of robustness for image distortion resulting from the JPEG DCT-baseline coding scheme. The results demonstrate that, compared with a conventional averaging-based method, the Gray-ECC method yields watermarked images with less amount of signal distortion and also makes the watermark comparably robust for lossy data compression. 展开更多
关键词 GRAY code error-correcting code Digital WATERMARK Spatial Domain JPEG DCT-Based Compression
下载PDF
Digital Image Watermarking Based on Mixed Error Correcting Code
12
作者 Yonghong Chen Jiancong Chen 《Journal of Information Security》 2012年第2期156-161,共6页
In this paper, we present a novel technique based on a mixed Error Correcting Code(ECC)-the convolutional code and the repetition code to enhance the robustness of the embedded watermark. Before embedding, the binary ... In this paper, we present a novel technique based on a mixed Error Correcting Code(ECC)-the convolutional code and the repetition code to enhance the robustness of the embedded watermark. Before embedding, the binary watermark is scanned to one-dimension sequence and later inputted into the (3, 1, 2) convolutional encoder and (3, 1) repetition encoder frame by frame, which will improve the error correcting capability of decoder. The output code sequence is scanned to some matrixes as the new watermark messages. The watermarking is selected in low frequency band of the Discrete Wavelet Transform (DWT) and therefore it can resist the destruction of image processing. Experimental results are presented to demonstrate that the robustness of a watermark with mixed ECC is much higher than the traditional one just with repetition coding while suffering JPEG lossy compression, salt and pepper noise and center cutting processing. 展开更多
关键词 error correctING code Discrete WAVELET TRANSFORM MIXED ECC WATERMARKING
下载PDF
Enhancement of Error-Correction Coding of Spatial Watermarks in Gray Code
13
作者 Tadahiko Kimoto 《Journal of Signal and Information Processing》 2013年第1期57-63,共7页
This paper demonstrates how channel coding can improve the robustness of spatial image watermarks against signal distortion caused by lossy data compression such as the JPEG scheme by taking advantage of the propertie... This paper demonstrates how channel coding can improve the robustness of spatial image watermarks against signal distortion caused by lossy data compression such as the JPEG scheme by taking advantage of the properties of Gray code. Two error-correction coding (ECC) schemes are used here: One scheme, referred to as the vertical ECC (VECC), is to encode information bits in a pixel by error-correction coding where the Gray code is used to improve the performance. The other scheme, referred to as the horizontal ECC (HECC), is to encode information bits in an image plane. In watermarking, HECC generates a codeword representing watermark bits, and each bit of the codeword is encoded by VECC. Simple single-error-correcting block codes are used in VECC and HECC. Several experiments of these schemes were conducted on test images. The result demonstrates that the error-correcting performance of HECC just depends on that of VECC, and accordingly, HECC enhances the capability of VECC. Consequently, HECC with appropriate codes can achieve stronger robustness to JPEG—caused distortions than non-channel-coding watermarking schemes. 展开更多
关键词 error-correctION Coding GRAY code Digital WATERMARK SPATIAL Domain JPEG DCT Compression
下载PDF
Homomorphic Error-Control Codes for Linear Network Coding in Packet Networks
14
作者 Xiaodong Han Fei Gao 《China Communications》 SCIE CSCD 2017年第9期178-189,共12页
In this work, the homomorphism of the classic linear block code in linear network coding for the case of binary field and its extensions is studied. It is proved that the classic linear error-control block code is hom... In this work, the homomorphism of the classic linear block code in linear network coding for the case of binary field and its extensions is studied. It is proved that the classic linear error-control block code is homomorphic network error-control code in network coding. That is, if the source packets at the source node for a linear network coding are precoded using a linear block code, then every packet flowing in the network regarding to the source satisfies the same constraints as the source. As a consequence, error detection and correction can be performed at every intermediate nodes of multicast flow, rather than only at the destination node in the conventional way, which can help to identify and correct errors timely at the error-corrupted link and save the cost of forwarding error-corrupted data to the destination node when the intermediate nodes are ignorant of the errors. In addition, three examples are demonstrated which show that homomorphic linear code can be combined with homomorphic signature, McEliece public-key cryptosystem and unequal error protection respectively and thus have a great potential of practical utility. 展开更多
关键词 NETWORK CODING NETWORK errorcorrection homomorphic LINEAR code multi-cast
下载PDF
A JOINT SIGNATURE ENCRYPTION AND ERROR CORRECTION PUBLIC-KEY CRYPTOSYSTEM BASED ON ALGEBRAIC CODING THEORY
15
作者 李元兴 成坚 王新梅 《Journal of Electronics(China)》 1992年第1期33-39,共7页
A joint signature,encryption and error correction public-key cryptosystem is pre-sented based on an NP-completeness problem-the decoding problem of general linear codes inalgebraic coding theory,
关键词 CRYPTOLOGY Public-key CRYPTOSYSTEM error-correcting codeS
下载PDF
Performance of entanglement-assisted quantum codes with noisy ebits over asymmetric and memory channels
16
作者 樊继豪 夏沛文 +1 位作者 戴迪康 陈一骁 《Chinese Physics B》 SCIE EI CAS CSCD 2023年第12期241-248,共8页
Entanglement-assisted quantum error correction codes(EAQECCs)play an important role in quantum communications with noise.Such a scheme can use arbitrary classical linear code to transmit qubits over noisy quantum chan... Entanglement-assisted quantum error correction codes(EAQECCs)play an important role in quantum communications with noise.Such a scheme can use arbitrary classical linear code to transmit qubits over noisy quantum channels by consuming some ebits between the sender(Alice)and the receiver(Bob).It is usually assumed that the preshared ebits of Bob are error free.However,noise on these ebits is unavoidable in many cases.In this work,we evaluate the performance of EAQECCs with noisy ebits over asymmetric quantum channels and quantum channels with memory by computing the exact entanglement fidelity of several EAQECCs.We consider asymmetric errors in both qubits and ebits and show that the performance of EAQECCs in entanglement fidelity gets improved for qubits and ebits over asymmetric channels.In quantum memory channels,we compute the entanglement fidelity of several EAQECCs over Markovian quantum memory channels and show that the performance of EAQECCs is lowered down by the channel memory.Furthermore,we show that the performance of EAQECCs is diverse when the error probabilities of qubits and ebits are different.In both asymmetric and memory quantum channels,we show that the performance of EAQECCs is improved largely when the error probability of ebits is reasonably smaller than that of qubits. 展开更多
关键词 asymmetric quantum channel entanglement fidelity entanglement-assisted quantum error correction code quantum memory channel
原文传递
基于ECOC平衡随机森林的雷达降水粒子分类
17
作者 李海 田众 钱君 《系统工程与电子技术》 EI CSCD 北大核心 2024年第5期1599-1606,共8页
针对数据不平衡情况下的降水粒子分类问题,提出了一种基于纠错输出码(error correcting output code,ECOC)平衡随机森林的双偏振气象雷达降水粒子分类方法。首先,将多类别降水粒子数据集编码为多个二分类数据集;然后,对二分类数据集进... 针对数据不平衡情况下的降水粒子分类问题,提出了一种基于纠错输出码(error correcting output code,ECOC)平衡随机森林的双偏振气象雷达降水粒子分类方法。首先,将多类别降水粒子数据集编码为多个二分类数据集;然后,对二分类数据集进行有放回的平衡重采样,构建多棵分类回归树;最后,利用所有的分类回归树联合进行降水粒子分类。对实测数据的处理结果表明,所提方法能够在保证总体准确率较高的情况下,大幅提高少数类的分类效果。 展开更多
关键词 双偏振气象雷达 降水粒子分类 数据不平衡 纠错输出码 平衡随机森林
下载PDF
面向投票类AI分类器的零冗余存储器容错设计
18
作者 柳姗姗 金辉 +6 位作者 刘思佳 王天琦 周彬 马瑶 王碧 常亮 周军 《集成电路与嵌入式系统》 2024年第6期1-8,共8页
投票类分类器广泛应用于多种人工智能(Artificial Intelligence,AI)场景,在其电路系统中,用于存储已知样本信息的存储器易受到辐射、物理特性变化等多种效应影响,引发软错误,继而可能导致分类失败。因此,在高安全性领域应用的AI分类器,... 投票类分类器广泛应用于多种人工智能(Artificial Intelligence,AI)场景,在其电路系统中,用于存储已知样本信息的存储器易受到辐射、物理特性变化等多种效应影响,引发软错误,继而可能导致分类失败。因此,在高安全性领域应用的AI分类器,其存储电路需要进行容错设计。现有存储器容错技术通常采用错误纠正码,但面向AI系统,其引入的冗余会进一步加剧本就面临挑战的存储负担。因此本文提出一种零冗余存储器容错技术,采用纠正错误对分类结果的负面影响而非纠正错误本身的设计思想,利用错误造成的数据翻转现象恢复出正确的分类结果。通过对k邻近算法进行实验验证,本文提出的技术在不引入任何冗余的情况下可达到近乎完全的容错能力,且相比于现有技术,节省了大量硬件开销。 展开更多
关键词 存储器 软错误 人工智能 分类器 错误纠正码 k邻近算法
下载PDF
新媒体背景下思政课教学“纠错码”功能优化研究--以“中国近现代史纲要”课为例 被引量:1
19
作者 王建红 宋倩宇 《廊坊师范学院学报(社会科学版)》 2024年第1期113-121,共9页
在新媒体背景下,思政课教学中充斥着大量的信息“噪声”干扰,不可避免却又直接影响着教学效果的提升,而“中国近现代史纲要”课程“以史育人”的内容特点更易遭受信息“噪声”的干扰,因此有必要引入信息论中“噪声”干扰难以消除时的纠... 在新媒体背景下,思政课教学中充斥着大量的信息“噪声”干扰,不可避免却又直接影响着教学效果的提升,而“中国近现代史纲要”课程“以史育人”的内容特点更易遭受信息“噪声”的干扰,因此有必要引入信息论中“噪声”干扰难以消除时的纠错码应对机制,有效降低新媒体“噪声”对它的影响。利用重塑“纠错码”防范功能、维护“纠错码”纠正反馈功能、革新“纠错码”建设功能等措施辩证发力,可以将新媒体给“中国近现代史纲要”课程带来“噪声”干扰的“变量”转化为提升信息传输实效的“增量”,为提升课程育人实效提供全新思路。 展开更多
关键词 思政课 新媒体 “纠错码” “中国近现代史纲要”课
下载PDF
新纠缠辅助量子MDS码的构造
20
作者 汪盼 王立启 朱士信 《电子学报》 EI CAS CSCD 北大核心 2024年第1期288-297,共10页
纠缠辅助量子纠错码是经典量子纠错码的推广,通过在接收者和发送者双方预先共享纠缠态的方式实现量子通信.由于预先共享纠缠态会造成额外的费用,如何构造具有较小预先共享纠缠态的纠缠辅助量子纠错码是一个有趣的问题.本文给出了有限域... 纠缠辅助量子纠错码是经典量子纠错码的推广,通过在接收者和发送者双方预先共享纠缠态的方式实现量子通信.由于预先共享纠缠态会造成额外的费用,如何构造具有较小预先共享纠缠态的纠缠辅助量子纠错码是一个有趣的问题.本文给出了有限域Fq2上一类负循环码是厄米特对偶包含码的充分条件,通过研究其分圆陪集的结构性质,确定了不同数目的预先共享纠缠态的存在条件,并结合纠缠辅助量子纠错码的构造方法,构造了一些新的具有较小预先共享纠缠态的纠缠辅助量子Maximum-Distance-Separable(MDS)码. 展开更多
关键词 分圆陪集 负循环码 纠缠辅助量子纠错码 MDS码
下载PDF
上一页 1 2 53 下一页 到第
使用帮助 返回顶部