Performance of an MLSE-based early stopping technique for turbo codes

Gracie, Ken; Crozier, S.; Guinand, Paul

doi:10.1109/vetecf.2004.1400449

Cited by 10 publications

(8 citation statements)

References 11 publications

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“…The severity of the flare and where it occurs are a function of both the distance spectrum of the code and the decoding process. In practice, even this suboptimal performance may be masked, for example by a poor early-stopping rule [104]. Performance in the waterfall region is dominated by the convergence properties of the code and the decoder.…”

Section: E Observations On Code Structure and Error Rate Performancementioning

confidence: 99%

Turbo and Turbo-Like Codes: Principles and Applications in Telecommunications

Gracie

Hamon

2007

Proc. IEEE

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Tremendous progress in reducing turbo code computational complexity, memory requirements and performance limitations is leading to their wide use in commercial communications systems.ABSTRACT | For decades, the de facto standard for forward error correction was a convolutional code decoded with the Viterbi algorithm, often concatenated with another code (e.g., aReed-Solomon code). But since the introduction of turbo codes in 1993, much more powerful codes referred to collectively as turbo and turbo-like codes have eclipsed classical methods.These powerful error-correcting techniques achieve excellent error-rate performance that can closely approach Shannon's channel capacity limit. The lure of these large coding gains has resulted in their incorporation into a widening array of telecommunications standards and systems. This paper will briefly characterize turbo and turbo-like codes, examine their implications for physical layer system design, and discuss standards and systems where they are being used. The emphasis will be on telecommunications applications, particularly wireless, though others are mentioned. Some thoughts on the use of turbo and turbo-like codes in the future will also be given.

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Section: E Observations On Code Structure and Error Rate Performancementioning

confidence: 99%

Turbo and Turbo-Like Codes: Principles and Applications in Telecommunications

Gracie

Hamon

2007

Proc. IEEE

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“…The Maximum Likelihood Sequence Estimation (MLSE) based stopping scheme recently presented in Ref. [6] also shows no signs of performance degradation relative to the GENIE scheme at very low Bit Error Rate (BER). However, similar to the HDA scheme, while the MLSE scheme does not require additional redundancy bits, its complexity is at least a half iteration higher than that of the GENIE scheme because of its need to compare the results of two successive decodings.…”

Section: Introductionmentioning

confidence: 99%

Joint Early Detection and Early Stopping scheme for complexity reduction of turbo decoding

Fan

Wai

2007

J. of Electron.(China)

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In this paper, a Joint Early Detection and Early Stopping (JEDES) approach for effectively reducing the complexity of turbo decoding with negligible performance loss is proposed. It combines the effectiveness of both early detection and early stopping techniques. Our simulation results demonstrated that the proposed JEDES scheme based on cyclic redundancy check and trellis splicing can achieve a complexity saving of 15% to 20% at practical bit error rates over the idealized GENIE stopping scheme, which is widely accepted as the theoretically best possible early stopping scheme.

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“…The decoder used enhanced max-log-a posteriori probability (maxlog-APP) decoding [14]. The extrinsic scale factor was 0.85 for codes with no data puncturing and 0.775 with 50% data puncturing.…”

Section: Performance Resultsmentioning

confidence: 99%

“…The decoder was set to decode for a maximum of 32 full iterations. The MLSE-based early stopping method was used [14]. The BCH decoder was only run after the turbo decoder stopped.…”

Section: Performance Resultsmentioning

confidence: 99%

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Performance of a 4-State Turbo Code with Data Puncturing and a BCH Outer Code

Kerr

Gracie

Crozier

23rd Biennial Symposium on Communications, 2006

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The performance of a concatenated Turbo code with an outer BCH code is examined. The Turbo code was based on simple 4-state constituent codes with a constrained high spread random (HSR) interleaver. Data puncturing, as opposed to puncturing only the parity bits, was used with the Turbo code to improve the convergence performance in the waterfall region. It is shown that this simple approach achieves performance better than the rate 1/2 DVB-S2 concatenated LDPC-BCH code.

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Performance of an MLSE-based early stopping technique for turbo codes

Cited by 10 publications

References 11 publications

Turbo and Turbo-Like Codes: Principles and Applications in Telecommunications

Turbo and Turbo-Like Codes: Principles and Applications in Telecommunications

Joint Early Detection and Early Stopping scheme for complexity reduction of turbo decoding

Performance of a 4-State Turbo Code with Data Puncturing and a BCH Outer Code

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