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Enhanced Implementation of Max ∗  Operator for Turbo Decoding

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Mobile, Ubiquitous, and Intelligent Computing

Part of the book series: Lecture Notes in Electrical Engineering ((LNEE,volume 274))

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Abstract

Max ∗  operator is the kernel operation in MAP decoding. An intuitive approximation to the correction term of max ∗  operator is presented. The binary-tree based architecture for multi-variable max ∗  calculation is also suggested. The proposed max ∗  operator provides a good trade off between hardware overhead and logic delay, and can be easily realized in parallel. Simulations on (37,21) turbo code demonstrate that the BER performance of proposed scheme is almost near the optimal Log-MAP algorithm and significantly superior to the Max-Log-MAP algorithm. The proposed enhanced implementation of max ∗  operator has potential applications in turbo decoder.

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Correspondence to Dongpei Liu .

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© 2014 Springer-Verlag Berlin Heidelberg

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Liu, D., Liu, H., Zhou, L. (2014). Enhanced Implementation of Max ∗  Operator for Turbo Decoding. In: Park, J., Adeli, H., Park, N., Woungang, I. (eds) Mobile, Ubiquitous, and Intelligent Computing. Lecture Notes in Electrical Engineering, vol 274. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-40675-1_63

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  • DOI: https://doi.org/10.1007/978-3-642-40675-1_63

  • Publisher Name: Springer, Berlin, Heidelberg

  • Print ISBN: 978-3-642-40674-4

  • Online ISBN: 978-3-642-40675-1

  • eBook Packages: EngineeringEngineering (R0)

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