- All Journals
- Al-Qadisiyah University
- Basrah University
- Kirkuk University
- Mosul University
- The Iraqi Borad for Medical Specialization
- University of Anbar
- University of Technology
- Al Mustafa University
- Al-Zahraa University for Women
- Alnoor University
- Kunooz University
- Misan University
- Ninevah University
- Tikrit University
- University of Al-Hamdaniya
- University of Kerbala
Serial Concatenated Codes Based on Iterative andNon-Iterative Decoding | ||
| Journal of Engineering and Sustainable Development | ||
| Article 1, Volume 10, Issue 1, 2006, Pages 48-65 | ||
| Authors | ||
| Samir Abd Al-Cathem; Maha George Zia | ||
| Abstract | ||
| This paper gives the design and implementation of iterative and non-iterative decodersof serially concatenated block and convolutional coding schemes. The maximum likelihood(ML) decoder is implemented by applying Viterbi algorithm to trellis of the code. Theperformance of non-iterative decoder has been improved by using soft input soft output(SISO) ML-decoder as inner decoder and soft decision decoder as output decoder. IterativeSISO ML decoding of product codes is implemented using Pyndiah’s iterative decoder. Thelog-maximum a posteriori (Log-MAP) decoder is used in iterative decoding of seriallyconcatenated codes (SCCs).To assess the performance of iterative and non-iterative decoders, simulation results for serially concatenated codes transmitted over AWGN channel, with low SNRs (power limited channel like deep space communication channel), are presented. The simulation process includes studying the bit error rate (BER) performances of serially concatenated codes with different parameters like, code dimension, minimum Hamming distance of the outer code, number of trellis sections (for block codes), number of memories, free distance, and encoder type (for convolutional codes). The influence of these parameters on interleaving gain and bit error rate of iterative and non-iterative decoders is discussed. | ||
|
Statistics Article View: 7 PDF Download: 4 |
||