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Performance analysis of ADSL with punctured convolutional code

IEICE TRANSACTIONS ON COMMUNICATIONS 1999年第7期E82B卷 1030-1037页

作者： Yang, WZ Ohtsuki, T Ueda, M Matsumoto, K Sasase, I Keio Univ Dept Informat & Comp Sci Yokohama Kanagawa 2238522 Japan Sci Univ Tokyo Dept Elect Engn Noda Chiba 2788510 Japan Sumitomo Elect Ind Ltd Osaka 5540022 Japan

We propose using punctured convolutional code for a Discrete Multitone (DMT) Asymmetric Digital Subscriber Line (ADSL) system to improve the data rate performance of ADSL. The theoretical performance of the systems with single coding rate for all subchannels, and with adaptive coding rate for each subchannel are presented respectively. It is found that the data rate performance of the proposed system is higher than the uncoded system.

关键词： ADSL DMT punctured convolutional code

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Adaptive modulation system with punctured convolutional code for high quality personal communication systems

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IEICE TRANSACTIONS ON COMMUNICATIONS 1996年第3期E79B卷 328-334页

作者： Matsuoka, H Sampei, S Morinaga, N Kamio, Y MPT COMMUN RES LAB KOGANEI TOKYO 184 JAPAN

This paper proposes an adaptive modulation system with a punctured convolutional code for land mobile communications to achieve high quality, high bit rate, and high spectral efficient data transmission in multipath fading environments. The proposed system adaptively controls the coding rate of the punctured convolutional code, symbol rate, and modulation level according to the instantaneous fading channel conditions. During good channel conditions, the modulation parameters are selected to increase the transmission rate as much as possible with satisfying a certain transmission quality. As channel conditions become worse, lower rate modulation parameters are applied or transmission is stopped. The performances in fading environments are evaluated theoretically and by computer simulations. The results show that the proposed system can realize higher quality transmission without the degradation in average bit rate compared to conventional adaptive modulation systems.

关键词： adaptive modulation system punctured convolutional code land mobile communications high quality transmission

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Performance comparisons of various PRML systems for rate 11/12 punctured convolutional code and 8/9 code

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1999年第5期82卷 54-62页

作者： Saito, H Furukawa, E Okamoto, Y Osawa, H Ehime Univ Fac Engn Matsuyama Ehime 7908577 Japan

Partial response signaling with maximum likelihood detection (PRML) systems using a rate 11/12 punctured convolution code (PCC) as a recording code in digital magnetic recording are proposed. The bit error rate (BER) performance for several PRML systems for the rate 11/12PCC is obtained by computer simulation and compared with that for the conventional rate 8/9 code. It is shown that among these PRML systems, E(2)PR4ML systems for the rate 11/12PCC outperform those for the rate 8/9 code and provide an SNR advantage of about 3.4 dB at a BER of 10(-4) and a normalized linear density of 3. (C) 1999 Scripta Technica, Electron Comm Jpn Pt 2, 82(5): 54-62, 1999.

关键词： digital magnetic recording PRML system punctured convolutional code 8/9 code

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SNR evaluation of punctured convolutional coded PR4ML system in digital magnetic recording with partial erasure effect

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IEICE TRANSACTIONS ON ELECTRONICS 1997年第9期E80C卷 1154-1160页

作者： Okamoto, Y Souma, M Tomimoto, S Saito, H Osawa, H Faculty of Engineering Ehime University Matsuyama-shi 790-77 Japan

A punctured convolutional coded PR4ML system for digital magnetic recording, which applies a punctured coding method to the convolutional code and records the punctured code sequences on two tracks, is proposed. In this study, the bit error rate performance of the proposed system is obtained by computer simulation taking account of partial erasure, which is one of the nonlinear distortions at high densities, and it is compared with those of a conventional 8/9 coded PR4ML system and an I-NRZI coded PR4ML system. The results show that the proposed system is hardly affected by partial erasure and exhibits good performance in high-density recording. A bit error rate of 10(-4) can be achieved with SNR's of approximately 13.2 dB and 9.1 dB less than those of the conventional 8/9 coded and I-NRZI coded PR4ML systems, respectively, at a normalized linear density of 3.

关键词： digital magnetic recording PRML system punctured convolutional code partial erasure

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FURTHER RESULTS ON HIGH-RATE punctured convolutional-codeS FOR VITERBI AND SEQUENTIAL-DECODING

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IEEE TRANSACTIONS ON COMMUNICATIONS 1990年第11期38卷 1922-1928页

作者： BEGIN, G HACCOUN, D PAQUIN, C Department of Electrical Engineering Ecole Polytechnique de Montreal Montreal QUE Canada

The weight spectra of high-rate punctured convolutional codes are evaluated under the hypothesis of a low-rate structure. This interpretation yields results slightly different from those obtained when weight spectra are evaluated assuming a true high-rate structure for punctured codes. The paper also extends the search for long memory punctured codes by providing new punctured codes of rates 4/5, 5/6, 6/7, and 7/8 with memories M ranging from 9 to 19.

关键词： punctured code sequential decoding rate structure code rate punctured convolutional code

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An efficient algorithm for the reconstruction of punctured convolutional codes

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EURASIP JOURNAL ON WIRELESS COMMUNICATIONS AND NETWORKING 2017年第1期2017卷 1页

作者： Chung, Habong Jang, Hwanseok Seong, Jinwoo Hongik Univ Dept Elect Engn Wausan Rd 94 Seoul 04066 South Korea Daumsoft Hannam Rd 21 Seoul South Korea Hongik Univ Elect Informat & Commun Engn Wausan Rd 94 Seoul 04066 South Korea

Puncturing is one of the methods of increasing the code rate, and the original code before puncturing is called the mother code. Any (N,K) convolutional code is obtainable by puncturing some (n,1) mother codes. The objective of a blind recognition of a channel code is to obtain its generator from the intercepted noisy bit stream. The process of the blind recognition of punctured convolutional codes consists of two parts: the reconstruction of the PGM of the (N,K) punctured convolutional code and the searching process of the mother code and its puncturing pattern. The process of finding the mother code is important for designing the optimum channel decoder. In this paper, a new searching algorithm with the computational complexity of O(K-4) polynomial operations is proposed, compared to the existing searching algorithm by M. Cluzeau which requires O(K-6) polynomial operations.

关键词： punctured convolutional code Mother code Blocked convolutional code Polynomial generator matrix

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HIGH-RATE punctured convolutional-codeS - STRUCTURE PROPERTIES AND CONSTRUCTION TECHNIQUE

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IEEE TRANSACTIONS ON COMMUNICATIONS 1989年第12期37卷 1381-1385页

作者： BEGIN, G HACCOUN, D Department of Electrical Engineering Ecole Polytechnique de Montreal Montreal QUE Canada

The authors present some properties of punctured convolutional codes, providing a construction method and a list of new, good, high-rate, long-memory punctured codes. The structure of punctured codes is examined and an upper bound on the free distance of punctured codes is derived, indicating that punctured codes are good codes. A construction method that generates the low-rate original codes which duplicate given known high-rate codes through perforation is proposed. Tables of punctured codes that duplicate the best known nonsystematic codes of rates 2/3 and 3/4 with memory lengths ranging from 3 to 23 and from 3 to 9, respectively, are given, together with the best known systematic codes for rates ranging from 2/3 to 7/8 with very long memory, M=44 through 48.

关键词： Construction methods punctured code codes code rate punctured convolutional code

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Blind recognition of punctured convolutional codes

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Science in China(Series F) 2005年第4期48卷 484-498页

作者： LUPeizhong LIShen ZOUYan LUOXiangyang DepartmentofComputerScienceandEngineering FudanUniversityShanghai200433China InstituteofInformationEngineering InformationandEngineeringUniversityZhengzhou450002China

This paper presents an algorithm for blind recognition of punctured convo-lutional codes which is an important problem in adaptive modulation and coding. For a given finite sequence of convolutional code, the parity check matrix of the convolutional code is first computed by solving a linear system with adequate error tolerance. Then a minimal basic encoding matrix of the original convolutional code and its puncturing pattern are determined according to the known parity check matrix of the punctured convolutional code.

关键词： blind recognition punctured convolutional code generator matrix puncturing pattern.

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punctured convolutional coded PR4ML system in digital magnetic recording

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ELECTRONICS AND COMMUNICATIONS IN JAPAN PART II-ELECTRONICS 1998年第9期81卷 62-70页

作者： Okamoto, Y Souma, M Saito, H Osawa, H Ehime Univ Fac Engn Matsuyama Ehime 790 Japan

A punctured convolutional coded PR4ML system for digital magnetic recording is proposed. In this system, convolutional coding is used for recording and two-track coded recording is carried out after using the punctured method. In this study, the error rate performance was simulated by a computer to compare this system with the conventional I-NRZI coded PR4ML system. Our system was found to have superior characteristics in high-density recording, and an error rate of 10(-4) could be achieved for a normalized linear density of K = 3, even when the SN ratio was about 3.8 dB lower at the reading point than in the conventional system. (C) 1998 Scripta Technica, Electron Comm Jpn Pt 2, 81(9): 62-70, 1998.

关键词： digital magnetic recording signal processing system PRML system punctured convolutional code

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A Construction of High Rate punctured convolutional codes

A Construction of High Rate Punctured Convolutional Codes

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International Symposium on Information Theory and its Applications (ISITA)

作者： Sasano, Hiroshi Moriya, Sen Kinki Univ Sch Sci & Engn Higashiosaka Osaka 5778502 Japan

ISBN: (纸本)9784885522673

We consider two methods that construct high rate punctured convolutional codes. First, we present best high rate R = (n - 1)/n punctured convolutional codes, for n = 5, 6, ... , 16, which are found by exhaustive searches. To obtain the best code, we use a regular convolutional code whose weight spectrum is equivalent to that of each punctured convolutional code. We search these regular equivalent codes for the best one. Next, we present a method that searches for good punctured convolutional codes by partial searches. This method searches the codes that are derived from R = 1/2 original codes obtained in the first method. By this method, we obtain some good punctured convolutional codes that have superior performance compared with that of the best codes.

关键词： punctured convolutional code codes Searches Equivalent

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