On the Robustness of Average-Entropy Stopping Criterion in Turbo Iterative Decoding

Authors

  • Roslina Mohamad Faculty of Electrical Engineering, Universiti Teknologi Mara, Shah Alam, Selangor, Malaysia. Aerospace Engineering Department, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.
  • Harlisya Harun Aerospace Engineering Department, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia. Avionics Section, UniKL MIAT, Dengkil, Selangor, Malaysia.
  • Makhfudzah Mokhtar Computer and Communication System Engineering Department, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.
  • Wan Azizun Wan Adnan Computer and Communication System Engineering Department, Faculty of Engineering, Universiti Putra Malaysia, Serdang, Selangor, Malaysia.
  • Kaharudin Dimyati Electrical and Electronic Engineering Department, Universiti Pertahanan Nasional Malaysia, Kuala Lumpur, Malaysia.

Keywords:

Turbo Codes, Iterative Decoding, AverageEntropy, Stopping Criterion.

Abstract

Average-entropy (AE) is an efficient early stopping criterion that is able to terminate early in a varying signal-tonoise ratio (SNR) environment while suffering very little performance degradation. However, the performance of AE is only based on two code structures and depends on correct SNR; hence, the robustness of AE is still unknown, especially for other code structures and in incorrect SNR estimation. Thus, this paper presents the robustness test and analysis of AE based on the following parameters: frame size, code structure, channel reliability, and code rate. From the analysis, AE is capable to achieve good average iteration number performance for SNR ≤ 0.5 dB while maintaining the BER performance in correct SNR estimation. AE can also operate well in constant estimated SNR= 0 dB. However, AE suffers BER degradation for SNR > 0.5 dB both in correct SNR estimation and constant estimated SNR= 1 dB.

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Published

2017-06-01

How to Cite

Mohamad, R., Harun, H., Mokhtar, M., Wan Adnan, W. A., & Dimyati, K. (2017). On the Robustness of Average-Entropy Stopping Criterion in Turbo Iterative Decoding. Journal of Telecommunication, Electronic and Computer Engineering (JTEC), 9(2-2), 165–169. Retrieved from https://jtec.utem.edu.my/jtec/article/view/2238

Issue

Vol. 9 No. 2-2: Circuit and System Advancement in Modern World I

Section

Articles

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