Podrobná bibliografie
| Název: |
Concatenated Coding Scheme with Variable Coding Gain. |
| Autoři: |
Kojima, Toshiharu, Fujimura, Akinori, Miyake, Makoto, Fujino, Tadashi, Yoshida, Hideo, Yamagishi, Atsuhiro |
| Zdroj: |
Electronics & Communications in Japan, Part 3: Fundamental Electronic Science; Mar1993, Vol. 76 Issue 3, p91-104, 14p |
| Témata: |
CODING theory, DIGITAL electronics, INFORMATION theory, MACHINE theory, REED-Solomon codes, DIGITAL signal processing mathematics, ERROR-correcting codes |
| Abstrakt: |
The concatenated coding scheme using convolutional coding with Viterbi decoding for inner code and Reed-Solomon (RS) code for outer codes is an attractive scheme that can achieve a coding gain larger than that of the convolutional coding with the Viterbi decoding scheme. Hence, it has attracted attention in a wide range of fields in satellite communications from space communications to digital image transmission systems. This paper presents the configuration and characteristics of a newly developed concatenated coding scheme with variable coding gain. This scheme enables selection of a coding gain considering the signal processing time of coding and decoding by enabling selection of: 1) the block length of the RS code (and its error-correction capability); 2) the depth of interweaving combining the inner and outer code by a single codec. In addition, in this scheme, a new synchronization word detection method was developed and employed. In this method, nonlinear conversion is applied to soft decision demodulated data to .synchronize the RS codeword and interleaving, it has been confirmed by numerical calculations that this synchronization word detection method has characteristics further improved over those of the conventional soft decision synchronization word detection method which is superior to the hard decision method. An experimental system was developed and the field test via Ka-band satellite of communication satellite No. 3 (CS-3) was performed, and the tradeoff relationships between the coding/decoding signal processing time and coding gain have been clarified quantitatively. [ABSTRACT FROM AUTHOR] |
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| Databáze: |
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