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IEEE International Workshop on Signal Processing Systems (SiPS)

作者： Hu, Guanghui Sha, Jin Nanjing Univ Sch Elect Sci & Engn Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781467396042

Along with the rapid development of communication technologies, forward error correction (FEC) codes have drawn a lot of research interests recently. Several modern codes such as super product code and staircase code are proposed for 100Gbps optical transport network. A kind of tail-biting code with some improvements on staircase code is proposed in this paper. This code not only possesses the high error-correcting-ability of the staircase code but also owns low decoding latency of conventional block code.

关键词： tail-biting code staircase code forward error correction (FEC) codes high-speed optical transport network (OTN)

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Existence condition for tail-biting convolutional codes

引用

IEICE TRANSACTIONS ON COMMUNICATIONS 2002年第11期E85B卷 2362-2368页

作者： Kim, Y Lee, PJ Pohang Univ Sci & Technol Div Elect & Comp Engn Pohang 790784 South Korea

We investigated the truncated convolutional code with the characteristics of a block code for block-based communication systems. Three truncation methods (direct truncation, tail-terminating, and tail-biting method) were introduced by other researchers. Each of the three methods has a weakness: the direct truncation method decreases the minimum distance, the tail-terminating method uses tail bits, and the tail-biting method can only be applied by using a complicated decoder, Although the tail-biting method gives a butter BER performance than the other two methods, we cannot apply the tail-biting method in all situations. Occasionally, the tail-biting convolutional code does not exist. Wang et al. presented two neccessary conditions for the existence of the tail-biting convolutional code of the rate-1/2 recursive systematic convolutional code. In this paper, we analyze the encoder of the convolutional code as a linear time invariant system, and present two theorems and six corollaries on the existence of the tail-biting convolutional code. These existence conditions are adaptable to all convolutional codes, In the communication system using the truncated convolutional code, these results are applicable to determining the truncation method.

关键词： convolutional code tail-biting code error-correcting code

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