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 논문에서는 빠르게 변하는 시간 분산 채널에서 WCDMA 셀룰러 시스템의 다운링크 전송에 적용될 때 DSTBC의 성능을 제시합니다. 첫째, 세 가지 DSTBC-WCDMA 수신기 아키텍처가 제안되었으며 이는 다음과 같습니다. (1) 결합 코드용 DSTBC 레이크 수신기 (D-레이크-C), (2) 결합 코드용 DSTBC 결정적 수신기 (D-Det-C) 및 (3) 결합 코드를 위한 DSTBC 결정론적 접두사 제거 수신기 (D-Det-DP-C). 검출은 디스크램블링과 역확산을 결합한 상관기와 DSTBC 디코더로 나눌 수 있습니다. 상관기는 최소 제곱(LS) 추정을 통해 다중 경로-다중 사용자 신호의 신호 분리를 수행하도록 설계되었습니다. 상관기가 매 블록 주기마다 신호 분리를 수행할 수 있도록 하기 위해, 긴 결합된 확산 코드와 스크램블링 코드를 더 짧은 코드로 분할합니다. 그런 다음 페이딩 분포의 순간 생성 함수(MGF)를 사용하여 제안된 수신기를 시간 분산 채널과 다중 사용자 환경에서 이론적으로 분석합니다. 간섭 허용 오차를 분석하기 위해 표준 가우스 근사법이 사용됩니다. 마지막으로 시뮬레이션이 수행됩니다. 이론적 성능은 시뮬레이션 결과와 잘 일치합니다. 세 가지 수신기 중 D-Det-DP-C 수신기는 최대 초과 지연 4칩과 최대 도플러 주파수 250Hz로 시간 분산 채널에서 최고의 성능을 발휘합니다. 또한 결과는 최대 도플러 주파수가 1200Hz인 빠른 페이딩 채널에 대한 성능 저하가 최소화된 것으로 나타났습니다. 수신기가 최대 초과 지연 및 모든 사용자의 확산 코드에 대한 정보를 가지고 있을 때 최상의 성능을 얻을 수 있습니다.
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Edwin M. UMALI, Joel Joseph S. MARCIANO, Jr., Yasushi YAMAO, "Performance of Downlink DSTBC-WCDMA in Fast-Varying Time-Dispersive Channels" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 12, pp. 3815-3826, December 2009, doi: 10.1587/transcom.E92.B.3815.
Abstract: This paper presents the performance of DSTBC when applied on the downlink transmission of WCDMA cellular systems in fast-varying time-dispersive channels. First, three DSTBC-WCDMA receiver architectures are proposed and they are: (1) the DSTBC Rake receiver for combined-code (D-Rake-C), (2) the DSTBC deterministic receiver for combined-code (D-Det-C), and (3) the DSTBC deterministic de-prefix receiver for combined-code (D-Det-DP-C). Detection can be divided into a correlator that combines descrambling and despreading, and a DSTBC decoder. The correlator is designed to perform signal separation of the multipath-multiuser signal via least-square (LS) estimation. To enable the correlator to perform signal separation at every block period, the long combined spreading and scrambling codes are divided into shorter codes. Then, the proposed receivers are theoretically analyzed in time-dispersive channels and multiple-user environment using the moment generating function (MGF) of fading distributions. For analyzing interference tolerance, the standard Gaussian approximation is employed. Finally, simulations are performed. Theoretical performance well matches simulated results. Among the three receivers, the D-Det-DP-C receiver has the best performance in time-dispersive channels with a maximum excess delay of 4 chips and a maximum Doppler frequency of 250 Hz. Results also show minimal performance degradation for fast fading channels with a maximum Doppler frequency of 1200 Hz. The best performance is obtained when the receiver has the information on the maximum excess delay and all users' spreading codes.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.3815/_p
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@ARTICLE{e92-b_12_3815,
author={Edwin M. UMALI, Joel Joseph S. MARCIANO, Jr., Yasushi YAMAO, },
journal={IEICE TRANSACTIONS on Communications},
title={Performance of Downlink DSTBC-WCDMA in Fast-Varying Time-Dispersive Channels},
year={2009},
volume={E92-B},
number={12},
pages={3815-3826},
abstract={This paper presents the performance of DSTBC when applied on the downlink transmission of WCDMA cellular systems in fast-varying time-dispersive channels. First, three DSTBC-WCDMA receiver architectures are proposed and they are: (1) the DSTBC Rake receiver for combined-code (D-Rake-C), (2) the DSTBC deterministic receiver for combined-code (D-Det-C), and (3) the DSTBC deterministic de-prefix receiver for combined-code (D-Det-DP-C). Detection can be divided into a correlator that combines descrambling and despreading, and a DSTBC decoder. The correlator is designed to perform signal separation of the multipath-multiuser signal via least-square (LS) estimation. To enable the correlator to perform signal separation at every block period, the long combined spreading and scrambling codes are divided into shorter codes. Then, the proposed receivers are theoretically analyzed in time-dispersive channels and multiple-user environment using the moment generating function (MGF) of fading distributions. For analyzing interference tolerance, the standard Gaussian approximation is employed. Finally, simulations are performed. Theoretical performance well matches simulated results. Among the three receivers, the D-Det-DP-C receiver has the best performance in time-dispersive channels with a maximum excess delay of 4 chips and a maximum Doppler frequency of 250 Hz. Results also show minimal performance degradation for fast fading channels with a maximum Doppler frequency of 1200 Hz. The best performance is obtained when the receiver has the information on the maximum excess delay and all users' spreading codes.},
keywords={},
doi={10.1587/transcom.E92.B.3815},
ISSN={1745-1345},
month={December},}
부
TY - JOUR
TI - Performance of Downlink DSTBC-WCDMA in Fast-Varying Time-Dispersive Channels
T2 - IEICE TRANSACTIONS on Communications
SP - 3815
EP - 3826
AU - Edwin M. UMALI
AU - Joel Joseph S. MARCIANO
AU - Jr.
AU - Yasushi YAMAO
PY - 2009
DO - 10.1587/transcom.E92.B.3815
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 12
JA - IEICE TRANSACTIONS on Communications
Y1 - December 2009
AB - This paper presents the performance of DSTBC when applied on the downlink transmission of WCDMA cellular systems in fast-varying time-dispersive channels. First, three DSTBC-WCDMA receiver architectures are proposed and they are: (1) the DSTBC Rake receiver for combined-code (D-Rake-C), (2) the DSTBC deterministic receiver for combined-code (D-Det-C), and (3) the DSTBC deterministic de-prefix receiver for combined-code (D-Det-DP-C). Detection can be divided into a correlator that combines descrambling and despreading, and a DSTBC decoder. The correlator is designed to perform signal separation of the multipath-multiuser signal via least-square (LS) estimation. To enable the correlator to perform signal separation at every block period, the long combined spreading and scrambling codes are divided into shorter codes. Then, the proposed receivers are theoretically analyzed in time-dispersive channels and multiple-user environment using the moment generating function (MGF) of fading distributions. For analyzing interference tolerance, the standard Gaussian approximation is employed. Finally, simulations are performed. Theoretical performance well matches simulated results. Among the three receivers, the D-Det-DP-C receiver has the best performance in time-dispersive channels with a maximum excess delay of 4 chips and a maximum Doppler frequency of 250 Hz. Results also show minimal performance degradation for fast fading channels with a maximum Doppler frequency of 1200 Hz. The best performance is obtained when the receiver has the information on the maximum excess delay and all users' spreading codes.
ER -