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Low complexity syndrome based decoding of Turbo codes

Jan Geldmacher, Klaus Hueske, Jurgen Gotze, Martin Kosakowski
2012 2012 IEEE International Symposium on Information Theory Proceedings  
A new syndrome trellis based decoding approach for Turbo coded data is described in this paper.  ...  Based on estimating error symbols instead of code symbols, it inherently features options for reducing the computational complexity of the decoding process.  ...  Block Syndrome Decoding Based on the described syndrome based Turbo decoder, the BSD concept [6] , [7] can be applied to achieve a reduction of decoding effort.  ... 
doi:10.1109/isit.2012.6283938 dblp:conf/isit/GeldmacherHGK12 fatcat:iqyp6xwr3vgxtlkbugl6c3ci5y

Efficient Decoding Technique for Block Product Turbo Codes

Je-Hun Lim, Young-Joon Song
2016 International Journal of Multimedia and Ubiquitous Engineering  
By employing syndrome-based iterative SISO decoding and iterative SISO decoding using an alpha value, we could obtain high BER performance.  ...  In this paper, we propose an efficient technique for an iterative soft input soft output (SISO) decoding algorithm of block turbo codes with constituent Hamming codes.  ...  Acknowledgment This paper was supported by Kumoh National Institute of Technology.  ... 
doi:10.14257/ijmue.2016.11.8.13 fatcat:6hzcu5j2hvbqrkkieiovvdm73i

Hard Decision Decoding Performance Improved Using Turbo Product Codes

Ch Ravi Kumar, K Padmaraju
2018 International Journal of Engineering & Technology  
The performance of hard decision decoding is improved with low complexity using multidimensional turbo product codes.  ...  In this paper, we propose a turbo product code with a bit flip algorithm to improve the performance of hard decision decoding.  ...  Decoding of Turbo Product Codes The decoding of multidimensional turbo products starts by decoding the bits based on the quantized level values.  ... 
doi:10.14419/ijet.v7i3.12.16030 fatcat:lnebqlhr6zdbzemxqcdkhgaf54

Hard decision based low SNR early termination for LTE Turbo decoding

Jan Geldmacher, Klaus Hueske, Jurgen Gotze, Martin Kosakowski
2011 2011 8th International Symposium on Wireless Communication Systems  
In this paper a syndrome based Low SNR early termination (Low SNR ET) scheme for Turbo decoding is presented.  ...  While Low SNR ET is a general principle, which can be applied in various scenarios, the focus of this work is on its application in the Long Term Evolution (LTE) system.  ...  It. / Reduction LLR based Error based Syndrome based Code Mod.  ... 
doi:10.1109/iswcs.2011.6125303 dblp:conf/iswcs/GeldmacherHGK11 fatcat:titsuxbfcbg3dp75ia22w3tqb4

On Distributed Arithmetic Codes And Syndrome Based Turbo Codes For Slepian-Wolf Coding Of Non Uniform Sources

E. Magli, G. Olmo, Aline Roumy, Velotiaray Toto-Zarasoa
2009 Zenodo  
Publication in the conference proceedings of EUSIPCO, Glasgow, Scotland, 2009  ...  The reason is that the heavier puncturing makes the syndrome based turbo code less efficient. The turbo code is still better at low correlation, as the DAC suffers from the decoder sub optimality.  ...  H(X|Y ) = H(p X ) + H(p) − H(p Y ) SYNDROME BASED TURBO CODING OF NON-UNIFORM SOURCES The turbo code we use in this system ( Fig. 3) is composed of two identical convolutional codes, and the decoding  ... 
doi:10.5281/zenodo.41557 fatcat:odgsumlb2bdhjpgdivclaa747u

Adaptive low complexity MAP decoding for turbo equalization

Jan Geldmacher, Klaus Hueske, Juergen Goetze, Sascha Bialas
2010 2010 6th International Symposium on Turbo Codes & Iterative Information Processing  
In this paper a syndrome based MAP decoder is proposed, that is capable of reducing the computational decoding effort during the iteration process without significantly influencing the convergence behavior  ...  It is based on the exchange of reliability information between the equalizer and the decoder, which is typically some sort of maximum a posteriori (MAP) decoder.  ...  In this work, a MAP decoder based on the syndrome former trellis is proposed. Note that compared to Turbo Codes, the decoder generates LLRs for the code bits, not for the information bits.  ... 
doi:10.1109/istc.2010.5613804 fatcat:essowlyvqvedxmim6lyuqy3t6i

Application of syndrome based Turbo decoding with adaptive computational complexity in LTE downlink

J. Geldmacher, K. Hueske, M. Kosakowski, J. Götze
2012 Advances in Radio Science  
</strong> This paper describes the application of an adaptive complexity decoder for the Long Term Evolution (LTE) downlink Turbo code.  ...  The proposed decoding approach is based on the block syndrome decoding principle and enables adaptive reduction of decoding effort depending on current SNR and iteration number with negligible influence  ...  Block syndrome decoding of Turbo codes Based on the described syndrome based Turbo decoder, the BSD concept as described in Sect. 2 can be applied to achieve a reduction of decoding effort.  ... 
doi:10.5194/ars-10-159-2012 fatcat:amoq5hnrzjdpzmximxmgoas3me

Syndrome-Based Light-Weight Video Coding for Mobile Wireless Application

Min Wu, Guogang Hua, Chang Chen
2006 2006 IEEE International Conference on Multimedia and Expo  
This scheme is based on two innovations: (1) adoption of low resolution low quality reference frames for motion estimation at the decoder; (2) introduction of more powerful product accumulate code.  ...  In conventional video coding, the complexity of an encoder is generally much higher than that of a decoder because of operations such as motion estimation consume significant computational resources.  ...  The decoder then uses a turbo-like algorithm which passes soft extrinsic information between decoders of the base codes and the accumulator code.  ... 
doi:10.1109/icme.2006.262608 dblp:conf/icmcs/WuHC06 fatcat:4ntfcbvikrcqdknmu2s5j744am


Luc Vandendorpe, Alex M. Haimovich, Ramesh Pyndiah
2005 EURASIP Journal on Advances in Signal Processing  
Babich et al. give a low-complexity method to optimize the puncturing pattern for rate-compatible punctured turbo codes.  ...  In "Convergence analysis of turbo decoding of serially concatenated block codes and product codes," authored by A.  ...  Babich et al. give a low-complexity method to optimize the puncturing pattern for rate-compatible punctured turbo codes.  ... 
doi:10.1155/asp.2005.759 fatcat:2bavylfqvbacdgfj5xkttz6fe4

Rate-adaptive codes for distributed source coding

David Varodayan, Anne Aaron, Bernd Girod
2006 Signal Processing  
Two classes of rate-adaptive distributed source codes, both based on Low-Density Parity-Check (LDPC) codes, are developed and their design is studied.  ...  Specific realizations are shown to be better than alternatives of linear encoding and decoding complexity.  ...  Both of these systems incur decoding complexity of up to O(n log n) since that is the soft decoding complexity for the base codes.  ... 
doi:10.1016/j.sigpro.2006.03.012 fatcat:bhznwle6ondnpkpcxqrxkyn65e

On the higher efficiency of parallel Reed-Solomon turbo-decoding

Camille Leroux, Christophe Jego, Patrick Adde, Michel Jezequel
2008 2008 15th IEEE International Conference on Electronics, Circuits and Systems  
Based on an innovative architecture, this is the rst implementation of fully parallel RS turbo decoder.  ...  A performance analysis is performed showing that RS Block Turbo Codes (RS-BTC) have decoding performance equivalent to Bose Ray-Chaudhuri Hocquenghem-Block Turbo Codes (BCH-BTC).  ...  The SISO decoding algorithm can be summarized as follows: do the syndrome based algebraic decoding of the T v test vectors that have been built by inversions of the Lr least reliable symbols in the received  ... 
doi:10.1109/icecs.2008.4675100 dblp:conf/icecsys/LerouxJAJ08 fatcat:rpylqebggfew3bnolreforx5ky

Complexity efficient stopping criterion for LDPC based distributed video coding

João Ascenso, Fernando Pereira
2009 Proceedings of the 5th International Mobile Multimedia Communications Conference  
In several distributed video coding architectures, a well-known complexity trade-off exists, where the low encoding benefits are paid with a higher decoding complexity.  ...  In this paper, an early stopping criterion for the LDPC syndrome belief propagation decoder is proposed that is able to reduce the number of decoding iterations.  ...  The LDPC codes have a wide range of tradeoffs between performance and decoding complexity and a similar encoding complexity can be achieved compared to the turbo codes with a careful LDPC code design  ... 
doi:10.4108/icst.mobimedia2009.7353 dblp:conf/mobimedia/AscensoP09 fatcat:3rcrv2kf7vbwngdde3k22eg67y

Towards Gb/s turbo decoding of product code onto an FPGA device

Camille Leroux, Christophe Jego, Patrick Adde, Michel Jezequel
2007 2007 IEEE International Symposium on Circuits and Systems  
First, a complexity analysis of the elementary decoder leads to a low complexity decoder architecture (area divided by 2) for a negligible performance degradation.  ...  This paper presents the implementation, on an FPGA device of an ultra high rate block turbo code decoder.  ...  A SISO decoder of an eBCH code based on the Chase-Pyndiah algorithm [2][9] is concisely summarized below: 1-Search for the Lr least reliable binary bits and compute the syndrome S 0 of [R'] k , 2-Generate  ... 
doi:10.1109/iscas.2007.378073 dblp:conf/iscas/LerouxJAJ07 fatcat:2f3k6bnh6vd4bhr4rypa6pkgzm

Design and performance of a novel low-density parity-check code for distributed video coding

Joao Ascenso, Catarina Brites, Fernando Pereira
2008 2008 15th IEEE International Conference on Image Processing  
Low-density parity-check (LDPC) codes are nowadays one of the hottest topics in coding theory, notably due to their advantages in terms of bit error rate performance and low complexity.  ...  The proposed LDPC codes reach a good performance for a wide range of source correlations and achieve a better RD performance when compared to the popular turbo codes.  ...  The first requirement is usually met by syndrome based LDPC coding; since the matrix H is sparse, the encoder complexity is kept low and proportional to the number of edges (or 1's) in the LDPC code.  ... 
doi:10.1109/icip.2008.4711955 dblp:conf/icip/AscensoBP08 fatcat:wwyjeb3mw5akxehiqwhlwts3ee

An optimized Distributed Video Coding using Turbo Codes and Zero Motion Skip Encoder Strategy

Chitra M
2012 IOSR Journal of Electronics and Communication Engineering  
The distributed video coding scheme is based on punctured turbo codes. Turbo codes are punctured to generate scalable compressed video bit streams.  ...  Distributed coding enables higher compression rate of a video signal. Till date we used a complex encoder and simple decoder.  ...  The distributed video coding scheme is based on punctured turbo codes.  ... 
doi:10.9790/2834-0121014 fatcat:6anrswteebgvdctna76robmqui
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