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Optical Nonlinear Phase Noise Compensation for 9 x 32-Gbaud PolDM-16 QAM Transmission Using a Code-Aided Expectation-Maximization Algorithm

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JOURNAL OF LIGHTWAVE TECHNOLOGY 2015年第17期33卷 3679-3686页

作者： Pan, Chunpo Buelow, Henning Idler, Wilfried Schmalen, Laurent Kschischang, Frank R. Univ Toronto Dept Elect & Comp Engn Toronto ON M5S 3G4 Canada Alcatel Lucent Bell Labs D-70435 Stuttgart Germany

Nonlinearity-induced phase noise has become a major obstacle in long-haul coherent fiber-optic communication systems. Such phase noise has been shown to be signal dependent, and correlated over time. We propose a code-aided expectation-maximization algorithm to mitigate such nonlinear phase noise, iteratively utilizing both the time correlation of the nonlinearity-induced impairments and a soft-decision error-control code. Simulation and experimental results show that on a dual-polarization wavelength-division-multiplexed 16 QAM system, launch-power tolerance can be increased by 1.5 dB, and the optical signal-to-noise ratio requirement can be relaxed by 0.3 dB to achieve the same Q(2)-factor.

关键词： Communication system nonlinearities digital filters equalizers error-correction coding optical fiber communication phase noise

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Fast iterative coding techniques for feedback channels

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IEEE TRANSACTIONS ON INFORMATION THEORY 1998年第7期44卷 2960-2976页

作者： Ooi, JM Wornell, GW MIT Dept Elect Engn & Comp Sci Cambridge MA 02139 USA MIT Elect Res Lab Cambridge MA 02139 USA

A class of capacity-achieving, low-complexity, high-reliability, variable-rate coding schemes is developed for communication over discrete memoryless channels with noiseless feedback, Algorithms for encoding and decoding that require computations growing linearly with the number of channel inputs used are developed. The error exponent associated with the scheme is shown to be optimal and implies that capacity is achievable. Simulations are performed and support the analytically predicted high performance and low complexity.

关键词： error-correction coding feedback channels iterative coding

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NUCLEOSIDES NUCLEOTIDES & NUCLEIC ACIDS 2010年第2期29卷 123-131页

作者： Liu, Xiao Tian, Feng Chun Wang, Shi Yuan Chongqing Univ Coll Commun Engn Chongqing 400044 Peoples R China

Based on the convolutional code model of error-correction coding theory, we propose an approach to characterize and compare DNA sequences with consideration of the effect of codon context. We construct an 8-component vector whose components are the normalized leading eigenvalues of the L/L and M/M matrices associated with the original DNA sequences and the transformed sequences. The utility of our approach is illustrated by the examination of the similarities/dissimilarities among the coding sequences of the first exon of -globin gene of 11 species, and the efficiency of error-correction coding theory in analysis of similarity/dissimilarity of DNA sequences is represented.

关键词： error-correction coding convolutional code similarities dissimilarities analysis

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THEORY IN BIOSCIENCES 2023年第3期142卷 205-210页

作者： Kak, Subhash Chapman Univ Orange CA 92866 USA Oklahoma State Univ Stillwater OK 74078 USA

This paper addresses the relationship between information and structure of the genetic code. The code has two puzzling anomalies: First, when viewed as 64 sub-cubes of a 4 x 4 x 4 cube, the codons for serine (S) are not contiguous, and there are amino acid codons with zero redundancy, which goes counter to the objective of error correction. To make sense of this, the paper shows that the genetic code must be viewed not only on stereochemical, co-evolution, and error-correction considerations, but also on two additional factors of significance to natural systems, that of an information-theoretic dimensionality of the code data, and the principle of maximum entropy. One implication of non-integer dimensionality associated with data dimensions is self-similarity to different scales, and it is shown that the genetic code does satisfy this property, and it is further shown that the maximum entropy principle operates through the scrambling of the elements in the sense of maximum algorithmic information complexity, generated by an appropriate exponentiation mapping. It is shown that the new considerations and the use of maximum entropy transformation create new constraints that are likely the reasons for the non-uniform codon groups and codons with no redundancy.

关键词： Maximum entropy principle Information efficiency Genetic code error-correction coding

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A novel coding method for gene mutation correction during protein translation process

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JOURNAL OF THEORETICAL BIOLOGY 2012年 296卷 33-40页

作者： Zhang, Lei Tian, Fengchun Wang, Shiyuan Liu, Xiao Chongqing Univ Coll Commun Engn Chongqing 400044 Peoples R China Southwest Univ Sch Elect & Informat Engn Chongqing 400715 Peoples R China

In gene expression, gene mutations often lead to negative effect of protein translation in prokaryotic organisms. With consideration of the influences produced by gene mutation, a novel method based on error-correction coding theory is proposed for modeling and detection of translation initiation in this paper. In the proposed method, combined with a one-dimensional codebook from block coding, a decoding method based on the minimum hamming distance is designed for analysis of translation efficiency. The results show that the proposed method can recognize the biologically significant regions such as Shine-Dalgarno region within the mRNA leader sequences effectively. Also, a global analysis of single base and multiple bases mutations of the Shine-Dalgarno sequences are established. Compared with other published experimental methods for mutation analysis, the translation initiation can not be disturbed by multiple bases mutations using the proposed method, which shows the effectiveness of this method in improving the translation efficiency and its biological relevance for genetic regulatory system. (C) 2011 Elsevier Ltd. All rights reserved.

关键词： Gene expression error-correction coding Shine-Dalgarno Translation initiation

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Spread Unsourced Random Access With an Iterative MIMO Receiver

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IEEE COMMUNICATIONS LETTERS 2022年第10期26卷 2495-2499页

作者： Nassaji, Ehsan Soltani, Roshanak Bashir, Murwan Truhachev, Dmitri Dalhousie Univ Dept Elect & Comp Engn Halifax NS B3J 1B6 Canada

This work is dedicated to the unsourced random access (URA) with multiple-antenna receiver. We utilize a preamble-payload packet format where the preamble, selected from a pool shared between all active users, serves as a temporary activity detection identifier. The payload carries the main portion of the message data which is encoded for error correction, permuted, and scrambled. The compressed-sensing (CS) preamble receiver that estimates the active preambles and the respective user channels is followed by a payload receiver which performs several iterations of data and channel estimation and parallel interference cancellation. Our numerical and analytic results demonstrate that the presented system outperforms the related work in terms of the achievable numbers of active users and signal-to-noise ratios (SNR)s supported by the system.

关键词： Receivers Channel estimation Decoding MIMO communication Payloads Multiuser detection Signal to noise ratio Unsourced random access MIMO iterative receiver error-correction coding

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On multiple insertion/deletion correcting codes

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IEEE TRANSACTIONS ON INFORMATION THEORY 2002年第1期48卷 305-308页

作者： Helberg, ASJ Ferreira, HC Potchefstroom Univ Christian Higher Educ Sch Elect & Elect Engn ZA-2520 Potchefstroom South Africa Rand Afrikaans Univ Lab Cybernet ZA-2006 Auckland Pk South Africa

We investigate binary, number-theoretic, bit insertion/deletion correcting codes as pioneered by Levenshtein. The weight spectra and Hamming distance properties of single insertion/deletion error-correcting codes are analyzed. These relationships are then extended to investigate codes that can correct multiple random insertions and deletions. From these relationships, new bounds are derived and a general construction for multiple insertion/deletion correcting codes is proposed and evaluated.

关键词： block codes error-correction coding forward error correction synchronization

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A 26.9 K 314.5 Mb/s Soft (32400,32208) BCH Decoder Chip for DVB-S2 System

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IEEE JOURNAL OF SOLID-STATE CIRCUITS 2010年第11期45卷 2330-2340页

作者： Lin, Yi-Min Chen, Chih-Lung Chang, Hsie-Chia Lee, Chen-Yi Natl Chiao Tung Univ Dept Elect Engn Hsinchu 30050 Taiwan

This paper provides a soft Bose-Chaudhuri-Hochquenghem (BCH) decoder chip with soft information from the LDPC decoder for the DVB-S2 system. In contrast with the hard BCH decoder, the proposed soft BCH decoder that deals with least reliable bits can provide much lower complexity with similar error-correcting performance. Moreover, the error locator evaluator is proposed to evaluate error locations without the Chien search for higher throughput, and the Bjorck-Pereyra error magnitude solver (BP-EMS) is presented to improve decoding efficiency and hardware complexity. The chip measurement results reveal that our proposed soft (32400, 32208) BCH decoder for DVB-S2 system can achieve 314.5 Mb/s with a gate-count of 26.9 K in standard 90 nm 1P9M CMOS technology. Extended for fully supporting 21 modes in the DVB-S2 system, our approach can achieve 300 MHz operation frequency with a gate-count of 32.4 K.

关键词： Bose-Chaudhuri-Hochquenghem (BCH) codes digital video broadcasting DVB-S2 error-correction coding

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Transmission efficient Modulation Based on Constellation Switching in Wireless Communication

Transmission efficient Modulation Based on Constellation Swi...

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6th International ICST Conference on Communications and Networking in China (CHINACOM)

作者： Lu, Wei Wang, Desheng Liu, Yingzhuang Huazhong Univ Sci & Technol Dept Elect & Informat Engn Wuhan Natl Lab Optoelect Wuhan 430074 Peoples R China

ISBN: (纸本)9781457701016

In this paper we propose a new efficient data modulation method, which is based on constellation switching modulation (CSM). The original bit stream is divided into sub-blocks, and each sub-block is modulated according to the constellation indicated by the constellation indicating bits (CIB) which are composed of data bits and parity bits. error-correction coding (ECC) is used to produce the parity bits for the improvement of the robustness of constellation estimation and bit-error rate performance. The error bounds of constellation estimation are derived. Simulation results show that the proposed algorithm can improve the transmission efficiency by at most 50% and 25% compared with the conventional BPSK and QPSK respectively in Rayleigh channel while still maintaining almost the same or even better BER performance as conventional BPSK and QPSK.

关键词： constellation switching modulation error-correction coding

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Algorithm of Multithreshold Decoding for Non-Binary Self-Orthogonal Concatenated Codes 8

Algorithm of Multithreshold Decoding for Non-Binary Self-Ort...

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8th IEEE International Conference on Application of Information and Communication Technologies (AICT)

作者： Zolotarev, Valery Ovechkin, Gennady Seitkulov, Yerzhan Satybaldina, Dina Tashatov, Nurlan Mishin, Vitaly Russian Acad Sci Inst Space Res Moscow Russia Ryazan State Radio Engn Univ Dept Computat & Appl Math Ryazan Russia LN Gumilyov Eurasian Natl Univ Inst Informat Secur & Cryptol Astana Kazakhstan LN Gumilyov Eurasian Natl Univ Dept Informat Technol Astana Kazakhstan

ISBN: (纸本)9781479941209

Non-binary multithreshold decoding (qMTD) for gory self-orthogonal codes (qSOC) is considered. The SER performance of qMTD is shown to be close to the results provided by optimum total search methods, which are not realizable for non-binary codes in general. qMTD decoders are compared with different decoders for Reed-Solomon codes. The performance provided with qMTD in some cases is unattainable with classical decoders for arbitrary long Reed-Solomon codes. The result of concatenation of qSOC with simple to decode outer codes is described. Method of improving of qMTD decoder's performance for qSOC is offered. Some simulated results obtained by using these two decoding techniques (the base and modified ways) are presented as well. Comparison of the results showed that the change in the threshold element's algorithm can significantly improve speed of qMTD work It's shown that for a larger gain this modification qMTD should be used after conventional decoding iterations.

关键词： Communication error-correction coding multithreshold decoding non-binary codes concatenated codes

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