The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. ex. Some numerals are expressed as "XNUMX".
Copyrights notice
The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
Cet article propose une démodulation/décodage itératif pour les systèmes parallèles à étalement combinatoire du spectre (PC/SS). Un système PC/SS transmet des données d'information par une combinaison de séquences d'étalement orthogonales pré-attribuées avec polarité. Dans cet article, le codage convolutif avec un entrelaceur aléatoire uniforme est implémenté dans le codage de canal, tout comme un codage concaténé en série. Un démodulateur PC/SS 'soft-in/soft-out' basé sur un algorithme de probabilité a posteriori est proposé pour effectuer la démodulation et le décodage itératifs. Les résultats de la simulation démontrent que le schéma de démodulation/décodage itératif proposé apporte une amélioration significative des performances en matière de taux d'erreur sur les bits. Ce schéma de décodage proposé permet une transmission à grande vitesse par deux approches. L'une est une opération de perforation et l'autre consiste à augmenter le nombre de séquences de transmission. Dans cette dernière approche, des performances de taux d'erreur plus faibles sont obtenues par rapport à celles où le code convolutif perforé est utilisé pour augmenter le débit binaire d'informations.
The copyright of the original papers published on this site belongs to IEICE. Unauthorized use of the original or translated papers is prohibited. See IEICE Provisions on Copyright for details.
Copier
Ken-ichi TAKIZAWA, Shigenobu SASAKI, Shogo MURAMATSU, Hisakazu KIKUCHI, "Iterative Demodulation and Decoding for Parallel Combinatorial SS Systems" in IEICE TRANSACTIONS on Fundamentals,
vol. E84-A, no. 12, pp. 2991-2999, December 2001, doi: .
Abstract: This paper proposes iterative demodulation/decoding for parallel combinatorial spread spectrum (PC/SS) systems. A PC/SS system conveys information data by a combination of pre-assigned orthogonal spreading sequences with polarity. In this paper, convolutional coding with a uniform random interleaver is implemented in channel coding, just like as a serial concatenated coding. A 'soft-in/soft-out' PC/SS demodulator based on a posteriori probability algorithm is proposed to perform the iterative demodulation and decoding. Simulation results demonstrate that the proposed iterative demodulation/decoding scheme bring significant improvement in bit error rate performance. This proposed decoding scheme achieves high-speed transmission by two approaches. One is a puncturing operation, and the other is to increase the number of transmitting sequences. In the latter approach, lower error rate performance is achieved comparing with that the punctured convolutional code is used to increase the information bit rate.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e84-a_12_2991/_p
Copier
@ARTICLE{e84-a_12_2991,
author={Ken-ichi TAKIZAWA, Shigenobu SASAKI, Shogo MURAMATSU, Hisakazu KIKUCHI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Iterative Demodulation and Decoding for Parallel Combinatorial SS Systems},
year={2001},
volume={E84-A},
number={12},
pages={2991-2999},
abstract={This paper proposes iterative demodulation/decoding for parallel combinatorial spread spectrum (PC/SS) systems. A PC/SS system conveys information data by a combination of pre-assigned orthogonal spreading sequences with polarity. In this paper, convolutional coding with a uniform random interleaver is implemented in channel coding, just like as a serial concatenated coding. A 'soft-in/soft-out' PC/SS demodulator based on a posteriori probability algorithm is proposed to perform the iterative demodulation and decoding. Simulation results demonstrate that the proposed iterative demodulation/decoding scheme bring significant improvement in bit error rate performance. This proposed decoding scheme achieves high-speed transmission by two approaches. One is a puncturing operation, and the other is to increase the number of transmitting sequences. In the latter approach, lower error rate performance is achieved comparing with that the punctured convolutional code is used to increase the information bit rate.},
keywords={},
doi={},
ISSN={},
month={December},}
Copier
TY - JOUR
TI - Iterative Demodulation and Decoding for Parallel Combinatorial SS Systems
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 2991
EP - 2999
AU - Ken-ichi TAKIZAWA
AU - Shigenobu SASAKI
AU - Shogo MURAMATSU
AU - Hisakazu KIKUCHI
PY - 2001
DO -
JO - IEICE TRANSACTIONS on Fundamentals
SN -
VL - E84-A
IS - 12
JA - IEICE TRANSACTIONS on Fundamentals
Y1 - December 2001
AB - This paper proposes iterative demodulation/decoding for parallel combinatorial spread spectrum (PC/SS) systems. A PC/SS system conveys information data by a combination of pre-assigned orthogonal spreading sequences with polarity. In this paper, convolutional coding with a uniform random interleaver is implemented in channel coding, just like as a serial concatenated coding. A 'soft-in/soft-out' PC/SS demodulator based on a posteriori probability algorithm is proposed to perform the iterative demodulation and decoding. Simulation results demonstrate that the proposed iterative demodulation/decoding scheme bring significant improvement in bit error rate performance. This proposed decoding scheme achieves high-speed transmission by two approaches. One is a puncturing operation, and the other is to increase the number of transmitting sequences. In the latter approach, lower error rate performance is achieved comparing with that the punctured convolutional code is used to increase the information bit rate.
ER -