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
본 논문은 다중 사용자 환경에서 동기식 직접 시퀀스 코드 분할 다중 접속(DS-CDMA) 시스템을 위한 D-MCTL(비상관 수정 코드 추적 루프)의 성능 분석을 제시합니다. 이전 연구에서는 신호의 시간 리드 및 시간 지연 부분에서 다중 액세스 간섭(MAI)의 불균형이 지연 잠금 루프(DLL) 또는 수정된 코드 추적 루프와 같은 기존 상관 추적 루프에서 추적 편향 또는 불안정 문제를 일으키는 것으로 나타났습니다. MCTL). 본 논문에서는 MCTL의 정시 코드 위치에서 MAI를 방지하기 위해 역상관 기법을 활용합니다. 낮은 신호 대 잡음비(SNR)에서 작은 추적 바이어스를 유발할 수 있는 잡음 불균형을 보상하기 위해 광범위한 검색 알고리즘이 필요한 DLL에 동일한 기술을 적용하는 것과 달리, 제안된 D-MCTL은 계산 복잡도가 훨씬 낮고 제로 추적을 나타냅니다. 간섭하는 사용자 수에 관계없이 전체 SNR 범위에 대한 편향. 또한 Gold 코드를 기반으로 한 성능 분석 및 시뮬레이션을 통해 제안된 방식은 기존 DLL(T-DLL)을 포함한 다른 추적 방식보다 평균 제곱 추적 오류, 평균 잠금 시간 및 근거리 저항이 더 우수하다는 것을 보여줍니다. , 기존 MCTL(T-MCTL) 및 수정된 상관 관계 해제 DLL(MD-DLL)입니다.
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부
Ya-Ting WU, Wai-Ki WONG, Shu-Hung LEUNG, Yue-Sheng ZHU, "Performance Analysis of a De-correlated Modified Code Tracking Loop for Synchronous DS-CDMA System under Multiuser Environment" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 6, pp. 1991-1999, June 2009, doi: 10.1587/transcom.E92.B.1991.
Abstract: This paper presents the performance analysis of a De-correlated Modified Code Tracking Loop (D-MCTL) for synchronous direct-sequence code-division multiple-access (DS-CDMA) systems under multiuser environment. Previous studies have shown that the imbalance of multiple access interference (MAI) in the time lead and time lag portions of the signal causes tracking bias or instability problem in the traditional correlating tracking loop like delay lock loop (DLL) or modified code tracking loop (MCTL). In this paper, we exploit the de-correlating technique to combat the MAI at the on-time code position of the MCTL. Unlike applying the same technique to DLL which requires an extensive search algorithm to compensate the noise imbalance which may introduce small tracking bias under low signal-to-noise ratio (SNR), the proposed D-MCTL has much lower computational complexity and exhibits zero tracking bias for the whole range of SNR, regardless of the number of interfering users. Furthermore, performance analysis and simulations based on Gold codes show that the proposed scheme has better mean square tracking error, mean-time-to-lose-lock and near-far resistance than the other tracking schemes, including traditional DLL (T-DLL), traditional MCTL (T-MCTL) and modified de-correlated DLL (MD-DLL).
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.1991/_p
부
@ARTICLE{e92-b_6_1991,
author={Ya-Ting WU, Wai-Ki WONG, Shu-Hung LEUNG, Yue-Sheng ZHU, },
journal={IEICE TRANSACTIONS on Communications},
title={Performance Analysis of a De-correlated Modified Code Tracking Loop for Synchronous DS-CDMA System under Multiuser Environment},
year={2009},
volume={E92-B},
number={6},
pages={1991-1999},
abstract={This paper presents the performance analysis of a De-correlated Modified Code Tracking Loop (D-MCTL) for synchronous direct-sequence code-division multiple-access (DS-CDMA) systems under multiuser environment. Previous studies have shown that the imbalance of multiple access interference (MAI) in the time lead and time lag portions of the signal causes tracking bias or instability problem in the traditional correlating tracking loop like delay lock loop (DLL) or modified code tracking loop (MCTL). In this paper, we exploit the de-correlating technique to combat the MAI at the on-time code position of the MCTL. Unlike applying the same technique to DLL which requires an extensive search algorithm to compensate the noise imbalance which may introduce small tracking bias under low signal-to-noise ratio (SNR), the proposed D-MCTL has much lower computational complexity and exhibits zero tracking bias for the whole range of SNR, regardless of the number of interfering users. Furthermore, performance analysis and simulations based on Gold codes show that the proposed scheme has better mean square tracking error, mean-time-to-lose-lock and near-far resistance than the other tracking schemes, including traditional DLL (T-DLL), traditional MCTL (T-MCTL) and modified de-correlated DLL (MD-DLL).},
keywords={},
doi={10.1587/transcom.E92.B.1991},
ISSN={1745-1345},
month={June},}
부
TY - JOUR
TI - Performance Analysis of a De-correlated Modified Code Tracking Loop for Synchronous DS-CDMA System under Multiuser Environment
T2 - IEICE TRANSACTIONS on Communications
SP - 1991
EP - 1999
AU - Ya-Ting WU
AU - Wai-Ki WONG
AU - Shu-Hung LEUNG
AU - Yue-Sheng ZHU
PY - 2009
DO - 10.1587/transcom.E92.B.1991
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 6
JA - IEICE TRANSACTIONS on Communications
Y1 - June 2009
AB - This paper presents the performance analysis of a De-correlated Modified Code Tracking Loop (D-MCTL) for synchronous direct-sequence code-division multiple-access (DS-CDMA) systems under multiuser environment. Previous studies have shown that the imbalance of multiple access interference (MAI) in the time lead and time lag portions of the signal causes tracking bias or instability problem in the traditional correlating tracking loop like delay lock loop (DLL) or modified code tracking loop (MCTL). In this paper, we exploit the de-correlating technique to combat the MAI at the on-time code position of the MCTL. Unlike applying the same technique to DLL which requires an extensive search algorithm to compensate the noise imbalance which may introduce small tracking bias under low signal-to-noise ratio (SNR), the proposed D-MCTL has much lower computational complexity and exhibits zero tracking bias for the whole range of SNR, regardless of the number of interfering users. Furthermore, performance analysis and simulations based on Gold codes show that the proposed scheme has better mean square tracking error, mean-time-to-lose-lock and near-far resistance than the other tracking schemes, including traditional DLL (T-DLL), traditional MCTL (T-MCTL) and modified de-correlated DLL (MD-DLL).
ER -