Half-iteration early termination of turbo decoding

AlMahamdy, Mohammed; Dill, J.C.

doi:10.1109/ccwc.2017.7868365

Cited by 5 publications

(2 citation statements)

References 27 publications

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“…Ever since its inception, Turbo codes [1,2] have been widely used in several technologies for 3G/4G standards such as CDMA-2000 [3] and Long Term Evolution (LTE) [4]. In view to lower the computational complexity and power consumption of the decoding system as well as keeping a fair trade-off in terms of error performance, several early-stopping mechanisms [5,6,7] have been devised and implemented over the years.…”

Section: Introductionmentioning

confidence: 99%

A Novel Hybrid SDR-Regression based Early Termination Processes for the Fully Parallel Turbo Decoder for LTE

Beeharry

2022

Preprint

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The fully parallel Turbo decoder has been developed in view to meet the requirements for next generation telecommunication systems. Given the slight increase in computational complexity as compared to the conventional serial decoder, there is still the need to fill this gap. As such, this paper presents early termination processes for the fully parallel Turbo decoder. The results demonstrate a slight degradation in error performance with the proposed hybrid scheme as compared to the conventional stand-alone early stopping mechanisms. The degradation in BER is around 0.5 dB on average below a BER of 10− 3 when a block length of 3072 is considered. For a block length of 6144, the degradation is less than 0.2 dB on average below a BER of 10− 1. Interestingly, the degradation in error performance decreases with increasing block length. Results for average number of decoding iterations reveal that the proposed scheme inherits the performance trends of both SDR and regression analysis based early stopping schemes. Additionally, the number of iterations for the hybrid scheme is lower than both conventional schemes throughout the full Eb/N0 region simulated. When considering a block length of 3072 and the Eb/N0 value of 2.0 dB, the proposed scheme uses 16 and 3 iterations less than the regression analysis and SDR based early stopping mechanisms respectively. In the case of a block length of 6144 and the Eb/N0 value of 2.0 dB, the proposed scheme uses 13 and 2 iterations less than the regression analysis and SDR based early stopping mechanisms respectively.

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Section: Introductionmentioning

confidence: 99%

A Novel Hybrid SDR-Regression based Early Termination Processes for the Fully Parallel Turbo Decoder for LTE

Beeharry

2022

Preprint

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“…Researchers solve this problem by developing stopping criteria and increasing turbo codes' performance [13]- [16]. Specifically, stopping criteria help reduce the iteration number in iterative turbo decoding while preserving turbo code efficiency [17], [18]. Most stopping criteria have been developed based on the frame level [7], [9], [14], and bit/window level [11], [12], [16].…”

Section: Introductionmentioning

confidence: 99%

The effects of the cross-entropy stopping criterion and quadrature amplitude modulation on iterative turbo decoding performance

Mohamad

Nasir

Anas³

2021

IJEECS

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One of the most often-used stopping criteria is the cross-entropy stopping criterion (CESC). The CESC can stop turbo decoder iterations early by calculating mutual information improvements while maintaining bit error rate (BER) performance. Most research on iterative turbo decoding stopping criteria has utilised low-modulation methods, such as binary phase-shift keying. However, a high-speed network requires high modulation to transfer data at high speeds. Hence, a high modulation technique needs to be integrated into the CESC to match its speed. Therefore, the present paper investigated and analysed the effects of the CESC and quadrature amplitude modulation (QAM) on iterative turbo decoding. Three thresholds were simulated and tested under four situations: different code rates, different QAM formats, different code generators, and different frame sizes. The results revealed that in most situations, the use of CESC is suitable only when the signal-to-noise ratio (SNR) is high. This is because the CESC significantly reduces the average iteration number (AIN) while maintaining the BER. The CESC can terminate early at a high SNR and save more than 40% AIN compared with the fixed stopping criterion. Meanwhile, at a low SNR, the CESC fails to terminate early, which results in maximum AIN.

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Turbo Coding Performance Improvement with Unbalanced Periodic Bit Insertion

AlMahamdy,

Dill

2023

2023 16th International Conference on Developments in eSystems Engineering (DeSE)

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Half-iteration early termination of turbo decoding

Cited by 5 publications

References 27 publications

A Novel Hybrid SDR-Regression based Early Termination Processes for the Fully Parallel Turbo Decoder for LTE

A Novel Hybrid SDR-Regression based Early Termination Processes for the Fully Parallel Turbo Decoder for LTE

The effects of the cross-entropy stopping criterion and quadrature amplitude modulation on iterative turbo decoding performance

Turbo Coding Performance Improvement with Unbalanced Periodic Bit Insertion

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