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Improving Performance of multithreshold decoder over Binary Erasure Channel 6

Improving Performance of Multithreshold Decoder over Binary ...

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6th Mediterranean Conference on Embedded Computing (MECO)

作者： Grinchenko, N. Gromov, A. Ovechkin, G. Ryazan State Radio Engn Univ Fac Comp Engn Ryazan Russia

ISBN: (纸本)9781509067428

The article discusses self-orthogonal error-correcting codes (SOC) for the decoding of which multithreshold algorithms (MTD) are usually used. The work gives the results of the research of MTD efficiency in binary erasure channels. Also new, longer and more efficient convolutional SOCs are received, comparative analysis of MTD efficiency and the efficiency of best methods to recover erasures is made. It is offered new concatenated code consisting of SOC and parity-check code for binary erasure channel allowing to decrease bit unrecovered erasure probability in the area of MTD efficient operation to 2..3 decimal orders. Lower bounds on bit unrecovered erasure probabilities for a decoder of the concatenated code are given;the its simulation results are discussed.

关键词： communication systems self-orthogonal codes multithreshold decoder iterative decoding parity-check codes concatenated codes binary erasure channels erasure recovering

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Increase Efficiency of Multilevel multithreshold decoder for Self-Orthogonal Codes

Increase Efficiency of Multilevel Multithreshold Decoder for...

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International Siberian Conference on Control and Communications (SIBCON)

作者： Cao, V. T. Grinchenko, N. N. Ovechkin, G., V Ryazan State Radio Engn Univ Fac Comp Engn Ryazan Russia

ISBN: (纸本)9781467383837

This paper considers multilevel multithreshold decoder for a self-orthogonal codes. Simulation results for an AWGN channel are reported. New modifications of this decoder provided coding gain improving by a few tenths of dB due to better using of the bits soft information are offered. Recommendations to choose the best algorithms of constituting blocks of the multilevel multithreshold decoder and its parameters are given.

关键词： error-correcting coding self-orthogonal code multithreshold decoder multilevel multithreshold decoder

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Improving Performance of multithreshold decoder for Self-Orthogonal Codes 5

Improving Performance of Multithreshold Decoder for Self-Ort...

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5th Mediterranean Conference on Embedded Computing (MECO)

作者： Baranchikov, A. I. Grinchenko, N. N. Ovechkin, G. V. Ryazan State Radio Engn Univ Fac Comp Engn Ryazan Russia

ISBN: (纸本)9781509022212

The article discusses self-orthogonal error-correcting codes (SOC) for the decoding of which multithreshold algorithms (MTD) are usually used. To decode SOC the algorithms used for low-density parity-check (LDPC) codes can also be applied. The article shows that using a min-sum decoder for SOC over a channel with additive white Gaussian noise (AWGN) in case of binary phase shift keying allows to receive additional coding gain about 1..1,5 dB in comparison with MTD usage. At the same time computing complexity in a min-sum algorithm turns out to be 6...7 times higher than MTD. For SOC decoding the work offers a combined decoder including the elements of MTD and min-sum algorithms. The first several decoding iterations require the usage of min-sum decoder while later MTD is added. The results of offered decoder simulation show about 1 dB increase of coding gain in comparison with MTD for SOC over a channel with AWGN with binary phase shift keying in case of twofold increase of computing complexity. The gain received depends on the SOC used, the number of min-sum decoding iterations and MTD.

关键词： self-orthogonal codes multithreshold decoder LDPC codes min-sum decoder coding gain combined decoder

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High Throughput Software multithreshold decoder on GPU 3

High Throughput Software Multithreshold Decoder on GPU

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3rd International Conference on Mathematics and Computers in Sciences and in Industry (MCSI)

作者： Zolotarev, V Ovechkin, G. Ovechkin, P. Satybaldina, D. Tashatov, N. Sankibayev, D. Ryazan State Radio Engn Univ Dept Computat & Appl Math Ryazan Russia LN Gumilyov Eurasian Natl Univ Dept Comp Engn Astana Kazakhstan

ISBN: (纸本)9781509009732

multithreshold decoder (MTD) is the simplest type of majority decoder that decodes self-orthogonal codes. Low computational complexity and simple decoding hardware implementation of multithreshold decoders allow using them in high speed communication systems and data storage systems that require decoding information at speeds above 1 Gbit/s. A high-speed software binary multithreshold decoder using a modern computing power of the graphics processing unit (GPU) is considered. Such software implementation of MTD helps to decode several hundred blocks received from the channel completely parallel and independent from each other. It is shown that the speed of software MTD based on GPU GTX 970 can reach 350 Mbit/s.

关键词： communication systems error-correction coding multithreshold decoder self-orthogonal codes software decoders graphics processing units (GPU) CUDA SDR

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The Performance of multithreshold decoders in Concatenated Schemes Over Erasure Channels 8

The Performance of Multithreshold Decoders in Concatenated S...

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8th Mediterranean Conference on Embedded Computing (MECO)

作者： Zolotarev, V. V. Grinchenko, N. N. Ovechkin, G., V Ovechkin, P., V Russian Acad Sci Space Res Inst Dept 71 Moscow Russia Ryazan State Radio Engn Univ Fac Comp Engn Ryazan Russia

ISBN: (纸本)9781728117393

multithreshold decoders (MTD) of self-orthogonal codes (SOC) for erasure channels implementing error correction methods based on searching global extremum of functions in discrete spaces are considered. To increase the efficiency of erasure recoveries the concatenated codes comprising inner SOC and outer codes being simple for decoding such as parity-check codes, Hamming codes or BCH codes are offered. The usage of the codes offered provides efficient erasure recovery when operating near channel capacity with linear decoder complexity. The questions of high-throughput software MTD implementation recovering erasures using GPU are considered. The MTD versions developed are shown to be able to perform data flow decoding with the rate of several hundred MB/s using GPU.

关键词： error-correction coding multithreshold decoder self-orthogonal code concatenated code parity-check code hamming code BCH code erasure recovering channel capacity GPU implementation

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Analytical Estimation of Self-Orthogonal Code multithreshold decoders Efficiency 9

Analytical Estimation of Self-Orthogonal Code Multithreshold...

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9th Mediterranean Conference on Embedded Computing (MECO)

作者： Ovechkin, G., V Grinchenko, N. N. Svetlov, G., V Fokina, N. S. Ryazan State Radio Engn Univ Fac Comp Engn Ryazan Russia RPTP Granit Ryazan Russia

ISBN: (纸本)9781728169491

multithreshold decoders (MTD) of self-orthogonal codes (SOC) for channels with errors as well as erasure channels are discussed. The work offers analytical estimations of MTD efficiency considering SOC structure as well as decoder parameters. These estimations are shown to correspond well with computer simulation results allowing us to estimate the area of MTD efficient operation in the conditions of high noise level.

关键词： error-correction code multithreshold decoder self-orthogonal code binary symmetric channel erasure channel lower bound bit error/erasure rate estimation

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Usage of Divergence within Concatenated multithreshold Decoding Convolutional Codes

Usage of Divergence within Concatenated Multithreshold Decod...

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Advances in Wireless and Optical Communications (RTUWO) Conference

作者： Zolotarev, V. V. Ovechkin, G. V. Ovechkin, P. V. Egamberdiyev, E. Russian Acad Sci Space Res Inst Dept 71 Moscow Russia Ryazan State Radio Engn Univ Dept Computat & Appl Math Ryazan Russia LN Gumilyov Eurasian Natl Univ Dept Comp Engn Astana Kazakhstan

ISBN: (纸本)9781538605851

The present paper has considered multithreshold decoders for self-orthogonal codes providing a near-optimal efficiency of the error correction under linear computational complexity. New divergence principle used within construction and decoding convolutional codes has been discussed. The paper has shown that usage of such principle allows significantly approximating an area of the decoder effective operation to the channel capacity. Application of obtained self-orthogonal codes within construction of concatenated convolutional codes where parity-check codes are used as the outer codes has been indicated, as well as simulation results for the obtained concatenated construction have been represented.

关键词： communication system error-correction coding self-orthogonal code concatenated code parity-check code multithreshold decoder divergent encoding divergent decoding decoder complexity coding gain

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A New Error Correction Scheme based on Concatenation of Self-Orthogonal Codes and Accumulate Codes

A New Error Correction Scheme based on Concatenation of Self...

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INTERNATIONAL SIBERIAN CONFERENCE ON CONTROL AND COMMUNICATIONS

作者： Ovechkin, G., V Demidov, D. S. Satybaldina, D. Zh Omirbayev, E. D. Ryazan State Radio Engn Univ Fac Comp Engn Ryazan Russia LN Gumilyov Eurasian Natl Univ Dept Comp Engn Astana Kazakhstan

ISBN: (纸本)9781509010813

multithreshold decoders (MTD) for the self-orthogonal codes (SOC) are considered. It is shown that applying of MTD for the well chosen codes provides almost optimum decoding. Noted that MTD using is difficult to provide a low decoding error probability at the a large noise level due to a small code distance of SOC. For reducing the error probability we propose a concatenated coding scheme formed by SOC and a nonredundant accumulate code. Simulation results show that these concatenated codes allow decrease BER decoding on four decimal orders at the almost optimum decoding area of the used SOC.

关键词： error-correcting coding self-orthogonal code accumulate code concatenated code multithreshold decoder min-sum decoder iterative decoder coding gain

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Developing the Principle of Divergent Coding for Gaussian Channels 7

Developing the Principle of Divergent Coding for Gaussian Ch...

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7th Mediterranean Conference on Embedded Computing (MECO)

作者： Valery, Zolotarev Natalya, Grinchenko Alexey, Lotsmanov Gennady, Ovechkin Russian Acad Sci Space Res Inst Dept 71 Moscow Russia Ryazan State Radio Engn Univ Fac Comp Engn Ryazan Russia

ISBN: (纸本)9781538656839

Mutithreshold decoding for convolutional codes implementing optimization methods to correct errors based on the search of global extremum of functionals in discrete spaces are considered. The implementation of divergent coding methods with triple concatenation to achieve highly efficient decoding near channel capacity is described. The possibilities of this approach while using concatenation are shown. Multialgorithmic decoding is offered. It implements the principle of divergence with simultaneous usage of two types of decoders: Viterbi algorithm and multithreshold decoding. The implementation of multialgorithmic decoding is shown to substantially decrease decoding complexity at low signal to noise ratio.

关键词： multithreshold decoder Viterbi algorithm self-orthogonal code divergent coding concatenated code parity-check code Shannon bound channel capacity decoding complexity optimal decoding coding gain multialgorithmic decoding

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Effective multithreshold Decoding Algorithms for Wireless Communication Channels 10

Effective Multithreshold Decoding Algorithms for Wireless Co...

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10th IEEE International Conference on Application of Information and Communication Technologies (AICT)

作者： Zolotarev, V Ovechkin, G. Issainova, A. Satybaldina, D. Tashatov, N. Ryazan State Radio Engn Univ Dept Computat & Appl Math Ryazan Russia LN Gumilyov Eurasian Natl Univ Dept Comp Engn Astana Kazakhstan

ISBN: (纸本)9781509018413

multithreshold decoding algorithms for self-orthogonal error-correction codes have been considered. Analytical estimations of their efficiency in the uncorrelated Rayleigh and Rician channels have been represented. Results of the computer simulation have been obtained. Possibilities to apply multithreshold decoders in combination with such technologies of the efficiency increase of data transmission systems in wireless fading channels as OFDM, MIMO, precoding are considered. The paper has shown that application of precoding under such conditions ensures a significant improvement of coding gain of the data transmission system.

关键词： error-correcting coding self-orthogonal code multithreshold decoder coding gain fading channel

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