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 광대역 직접 시퀀스 코드 분할 다중 접속(W-CDMA) 순방향 링크에 STTD(Space Time Transmit Diversity)를 적용할 때 달성 가능한 BER(Bit Error Rate) 성능 향상을 실험을 통해 설명합니다. 첫째, 실험실 실험 결과는 전파 지연으로 인해 두 안테나에서 전송된 신호의 수신 경로 타이밍 차이가 빠른 전송 전력 제어(TPC) 유무에 관계없이 대략 1/4 및 1/2의 칩 기간 내에 있어야 함을 명확히 합니다. , 각각 눈에 띄는 전송 다양성 효과를 달성하기 위해. 우리는 비트-배경 잡음 스펙트럼 밀도당 필요한 평균 수신 신호 에너지(Eb/N0) 평균 BER 10에서-3 STTD를 사용하는 경우 최대 도플러 주파수에서 단일 안테나 전송의 경우에 비해 약 4.2(1.7)dB 감소하며, fD, 버스트 오류의 무작위화 효과 증가로 인해 이동국(MS)에서 안테나 다이버시티 수신이 없는(포함) 5Hz입니다. 또한, 현장 실험에서는 실험실 실험에 비해 STTD의 이득이 감소하지만, 실제 다중 경로 페이딩 채널에서 각 경로의 지연 시간이 자주 변하므로 경로 검색 정확도의 저하가 더 크기 때문에, 비트-간섭당 필요한 평균 수신 신호 에너지와 배경 잡음 전력 스펙트럼 밀도 비율(Eb/I0) 평균 BER 10에서-3 STTD를 사용하면 순방향 링크에서 고속 TPC가 적용되지 않을 때 안테나 다이버시티 수신이 없는 경우 약 1.3~1.5(0.7~1.0)dB만큼 감소합니다. 이는 실제 다중 경로 페이딩 채널에서 공통 제어 채널과 같이 TPC가 없는 채널에 STTD가 효과적임을 나타냅니다.
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Satoru FUKUMOTO, Kenichi HIGUCHI, Mamoru SAWAHASHI, Fumiyuki ADACHI, "Experiments on Space Time Block Coding Transmit Diversity (STTD) in W-CDMA Forward Link" in IEICE TRANSACTIONS on Fundamentals,
vol. E84-A, no. 12, pp. 3045-3057, December 2001, doi: .
Abstract: This paper elucidates through experiments the improvement in the achievable bit error rate (BER) performance when space time transmit diversity (STTD) is applied to the wideband direct sequence code division multiple access (W-CDMA) forward link. First, laboratory experimental results clarify that the received path timing difference of transmitted signals from two antennas, due to the propagation delay, should be within a chip duration of approximately 1/4 and 1/2 with and without fast transmit power control (TPC), respectively, in order to achieve a prominent transmit diversity effect. We show that the required average received signal energy per bit-to-background noise spectrum density (Eb/N0) at the average BER of 10-3 using STTD is decreased by approximately 4.2 (1.7) dB compared to the case of single-antenna transmission at the maximum Doppler frequency, fD, of 5 Hz without (with) antenna diversity reception at a mobile station (MS) due to the increasing randomization effect of burst error. Furthermore, we elucidate that although the gain of STTD in field experiments is decreased compared to that in laboratory experiments, since the degradation in path search accuracy is greater due to the frequently changing delay time of each path in a real multipath-fading channel, the required average received signal energy per bit-to-interference plus background noise power spectrum density ratio (Eb/I0) at the average BER of 10-3 with STTD is decreased by approximately 1.3 to 1.5 (0.7 to 1.0) dB without (with) antenna diversity reception when fast TPC is not applied in the forward link. This indicates that STTD is effective for a channel without TPC such as a common control channel in a real multipath-fading channel.
URL: https://global.ieice.org/en_transactions/fundamentals/10.1587/e84-a_12_3045/_p
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@ARTICLE{e84-a_12_3045,
author={Satoru FUKUMOTO, Kenichi HIGUCHI, Mamoru SAWAHASHI, Fumiyuki ADACHI, },
journal={IEICE TRANSACTIONS on Fundamentals},
title={Experiments on Space Time Block Coding Transmit Diversity (STTD) in W-CDMA Forward Link},
year={2001},
volume={E84-A},
number={12},
pages={3045-3057},
abstract={This paper elucidates through experiments the improvement in the achievable bit error rate (BER) performance when space time transmit diversity (STTD) is applied to the wideband direct sequence code division multiple access (W-CDMA) forward link. First, laboratory experimental results clarify that the received path timing difference of transmitted signals from two antennas, due to the propagation delay, should be within a chip duration of approximately 1/4 and 1/2 with and without fast transmit power control (TPC), respectively, in order to achieve a prominent transmit diversity effect. We show that the required average received signal energy per bit-to-background noise spectrum density (Eb/N0) at the average BER of 10-3 using STTD is decreased by approximately 4.2 (1.7) dB compared to the case of single-antenna transmission at the maximum Doppler frequency, fD, of 5 Hz without (with) antenna diversity reception at a mobile station (MS) due to the increasing randomization effect of burst error. Furthermore, we elucidate that although the gain of STTD in field experiments is decreased compared to that in laboratory experiments, since the degradation in path search accuracy is greater due to the frequently changing delay time of each path in a real multipath-fading channel, the required average received signal energy per bit-to-interference plus background noise power spectrum density ratio (Eb/I0) at the average BER of 10-3 with STTD is decreased by approximately 1.3 to 1.5 (0.7 to 1.0) dB without (with) antenna diversity reception when fast TPC is not applied in the forward link. This indicates that STTD is effective for a channel without TPC such as a common control channel in a real multipath-fading channel.},
keywords={},
doi={},
ISSN={},
month={December},}
부
TY - JOUR
TI - Experiments on Space Time Block Coding Transmit Diversity (STTD) in W-CDMA Forward Link
T2 - IEICE TRANSACTIONS on Fundamentals
SP - 3045
EP - 3057
AU - Satoru FUKUMOTO
AU - Kenichi HIGUCHI
AU - Mamoru SAWAHASHI
AU - Fumiyuki ADACHI
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 elucidates through experiments the improvement in the achievable bit error rate (BER) performance when space time transmit diversity (STTD) is applied to the wideband direct sequence code division multiple access (W-CDMA) forward link. First, laboratory experimental results clarify that the received path timing difference of transmitted signals from two antennas, due to the propagation delay, should be within a chip duration of approximately 1/4 and 1/2 with and without fast transmit power control (TPC), respectively, in order to achieve a prominent transmit diversity effect. We show that the required average received signal energy per bit-to-background noise spectrum density (Eb/N0) at the average BER of 10-3 using STTD is decreased by approximately 4.2 (1.7) dB compared to the case of single-antenna transmission at the maximum Doppler frequency, fD, of 5 Hz without (with) antenna diversity reception at a mobile station (MS) due to the increasing randomization effect of burst error. Furthermore, we elucidate that although the gain of STTD in field experiments is decreased compared to that in laboratory experiments, since the degradation in path search accuracy is greater due to the frequently changing delay time of each path in a real multipath-fading channel, the required average received signal energy per bit-to-interference plus background noise power spectrum density ratio (Eb/I0) at the average BER of 10-3 with STTD is decreased by approximately 1.3 to 1.5 (0.7 to 1.0) dB without (with) antenna diversity reception when fast TPC is not applied in the forward link. This indicates that STTD is effective for a channel without TPC such as a common control channel in a real multipath-fading channel.
ER -