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
DS/CDMA(Direct-Sequence Code-Division Multiple-Access) 통신 시스템의 코드 획득 성능은 통신 시스템의 품질과 밀접한 관련이 있습니다. 성능은 (i) 코드 획득 시간; (ii) 정밀도; (iii) 구현의 복잡성. 본 논문에서는 DS/CDMA 통신의 전파지연 추정에 ML(Maximum Likelihood) 방법을 적용하고, 코드 획득을 위한 저복잡성 방법을 제안한다. 먼저 DS/CDMA 시스템 모델과 수동 정합 필터 수신기의 출력 특성을 검토하고 코드 획득의 통계적 문제를 언급합니다. 둘째, 최대 우도에 기반한 오류 제어 가능한 코드 획득 방법에 대해 논의합니다. 셋째, 복잡도가 낮은 ML 코드 획득 방법을 제안한다. 낮은 복잡도 방법을 사용한 코드 획득 시간은 원래 ML 방법을 사용한 것보다 약 1.5배 더 길다는 것을 알 수 있습니다(예: 13dB 미만의 4.96개 데이터 기간).
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Nobuoki ESHIMA, Tohru KOHDA, "Low-Complexity Code Acquisition Method in DS/CDMA Communication Systems: Application of the Maximum Likelihood Method to Propagation Delay Estimation" in IEICE TRANSACTIONS on Communications,
vol. E91-B, no. 5, pp. 1472-1479, May 2008, doi: 10.1093/ietcom/e91-b.5.1472.
Abstract: Code acquisition performance in the Direct-Sequence Code-Division Multiple-Access (DS/CDMA) communication system is strongly related to the quality of the communication systems. The performance is assessed by (i) code acquisition time; (ii) precision; and (iii) complexity for implementation. This paper applies the method of maximum likelihood (ML) to estimation of propagation delay in DS/CDMA communications, and proposes a low-complexity method for code acquisition. First, a DS/CDMA system model and properties of outputs with a passive matched-filter receiver are reviewed, and a statistical problem in code acquisition is mentioned. Second, an error-controllable code acquisition method based on the maximum likelihood is discussed. Third, a low-complexity ML code acquisition method is proposed. It is shown that the code acquisition time with the low-complexity method is about 1.5 times longer than that with the original ML method, e.g. 13 data periods under 4.96 dB.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e91-b.5.1472/_p
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@ARTICLE{e91-b_5_1472,
author={Nobuoki ESHIMA, Tohru KOHDA, },
journal={IEICE TRANSACTIONS on Communications},
title={Low-Complexity Code Acquisition Method in DS/CDMA Communication Systems: Application of the Maximum Likelihood Method to Propagation Delay Estimation},
year={2008},
volume={E91-B},
number={5},
pages={1472-1479},
abstract={Code acquisition performance in the Direct-Sequence Code-Division Multiple-Access (DS/CDMA) communication system is strongly related to the quality of the communication systems. The performance is assessed by (i) code acquisition time; (ii) precision; and (iii) complexity for implementation. This paper applies the method of maximum likelihood (ML) to estimation of propagation delay in DS/CDMA communications, and proposes a low-complexity method for code acquisition. First, a DS/CDMA system model and properties of outputs with a passive matched-filter receiver are reviewed, and a statistical problem in code acquisition is mentioned. Second, an error-controllable code acquisition method based on the maximum likelihood is discussed. Third, a low-complexity ML code acquisition method is proposed. It is shown that the code acquisition time with the low-complexity method is about 1.5 times longer than that with the original ML method, e.g. 13 data periods under 4.96 dB.},
keywords={},
doi={10.1093/ietcom/e91-b.5.1472},
ISSN={1745-1345},
month={May},}
부
TY - JOUR
TI - Low-Complexity Code Acquisition Method in DS/CDMA Communication Systems: Application of the Maximum Likelihood Method to Propagation Delay Estimation
T2 - IEICE TRANSACTIONS on Communications
SP - 1472
EP - 1479
AU - Nobuoki ESHIMA
AU - Tohru KOHDA
PY - 2008
DO - 10.1093/ietcom/e91-b.5.1472
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E91-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2008
AB - Code acquisition performance in the Direct-Sequence Code-Division Multiple-Access (DS/CDMA) communication system is strongly related to the quality of the communication systems. The performance is assessed by (i) code acquisition time; (ii) precision; and (iii) complexity for implementation. This paper applies the method of maximum likelihood (ML) to estimation of propagation delay in DS/CDMA communications, and proposes a low-complexity method for code acquisition. First, a DS/CDMA system model and properties of outputs with a passive matched-filter receiver are reviewed, and a statistical problem in code acquisition is mentioned. Second, an error-controllable code acquisition method based on the maximum likelihood is discussed. Third, a low-complexity ML code acquisition method is proposed. It is shown that the code acquisition time with the low-complexity method is about 1.5 times longer than that with the original ML method, e.g. 13 data periods under 4.96 dB.
ER -