Application of Turbo TCM Codes for Impulsive Noise Channel (Special Section on Information Theory and Its Applications)

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概要

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• A turbo TCM system is applied to a channel with overall noise which is equal to the additive combination of impulsive Gaussian noise and Additive White Gaussian Noise (AWGN). By taking the distribution of the previously mentioned overall noise into account, a decoding algorithm for Poisson occurrence impulsive noise is derived as an extension of that for AWGN. A simulation result shows that E_b/N_0 difference from Shannon limit to realize BER=10^<-4> is 0.493dB. To investigate the effect of burst noise, we discuss the case of additive impulsive noise with Markovian occurrence which is represented by Hidden Markov Model. A decoding algorithm for Markovian noise is proposed. In the iterative decoding for the Markovian channel, the decoding algorithms for Markovian and Poisson noise are applied separately to the two component decoders. The decoding algorithm for Markovian noise is used in the component decoder wherein received signal is directly fed, while the decoding algorithm for Poisson noise is used in the component decoder wherein received signal is fed after passing an interleaver. This paper also shows simulation results that include the effects of varying the noise parameters in the decoding. In the Markovian case, when smaller value of variance of impulsive noise is used, the observed flattening of BER performance is more serious compared to the effect in the Poisson noise channel. No flattening is observed when large value is used.

• 社団法人電子情報通信学会の論文
• 1998-10-25

著者

• Ogiwara Haruo

  Faculty Of Engineering Nagaoka University Of Technology

• Ogiwara Haruo

  Faculty Of Electrical Engineering Nagaoka University Of Technology

• Koike K

  Tokyo National Coll. Technol. Hachioji‐shi Jpn

• KOIKE Kiyoyuki

  Faculty of Engineering, Nagaoka University of Technology

関連論文

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• Simple Computation Method of Soft Value for Iterative Decoding for Product Code Composed of Linear Block Code (Special Section on Information Theory and Its Applications)
• Integration of Adaptive Equalization and Trellis-Coded Modulation with Interleaving for Land Mobile Communications
• Iterative Decoding of Serially Concatenated Punctured Trellis-Coded Modulation (Special Section on Information Theory and Its Applications)
• Application of Turbo TCM Codes for Impulsive Noise Channel (Special Section on Information Theory and Its Applications)

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