| Presentation | 2001/3/16 A Study on Iterative Decoding of Two-dimensional Convolutional Codes Yousuke KINOSHITA, Masahiro FUJII, Makoto ITAMI, Kohji ITOH, |
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| PDF Download Page | PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | A new class of convolutional codes called Turbo codes, whose performances in terms of Bit Error Rate (BER) are close to the SHANNON limit. The Turbo Code encoder is built using a parallel concatenation of two Recursive Systematic Convolutional codes and the associated decoder, using a feed back decoding rule. The iterative operation of decoding blockinterleaved Turbo codes can be viewed as weakly coupled two-dimensional encoder constraints mutually interest in turn via posteriori probabirity of information bits. Based on this view point, we propose in each interation of MAP decoding to take into account the encoder constraint other than that the iteration follows. In order futher to strengthen the effect of the design, we replace the weakly coupled two-dimensional Turbo encoder with a closely coupled one. By employing an encoder optimized of its free distance, the proposed system was found to outperform the blockinterleaved Turbo codec. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Turbo-Codes / MAP Algorithm / Iteration |
| Paper # | IT2000-105,ISEC2000-159,SST2000-189,ITS2000-114 |
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| Conference Information | |
| Committee | ISEC |
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| Conference Date | 2001/3/16(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Information Security (ISEC) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | A Study on Iterative Decoding of Two-dimensional Convolutional Codes |
| Sub Title (in English) | |
| Keyword(1) | Turbo-Codes |
| Keyword(2) | MAP Algorithm |
| Keyword(3) | Iteration |
| 1st Author's Name | Yousuke KINOSHITA |
| 1st Author's Affiliation | Department of Applied Electronics, Science University of Tokyo() |
| 2nd Author's Name | Masahiro FUJII |
| 2nd Author's Affiliation | Department of Applied Electronics, Science University of Tokyo |
| 3rd Author's Name | Makoto ITAMI |
| 3rd Author's Affiliation | Department of Applied Electronics, Science University of Tokyo |
| 4th Author's Name | Kohji ITOH |
| 4th Author's Affiliation | Department of Applied Electronics, Science University of Tokyo |
| Date | 2001/3/16 |
| Paper # | IT2000-105,ISEC2000-159,SST2000-189,ITS2000-114 |
| Volume (vol) | vol.100 |
| Number (no) | 692 |
| Page | pp.pp.- |
| #Pages | 6 |
| Date of Issue | |