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
MMSE(최소 평균 제곱 오류) 기준을 기반으로 하는 FDE(주파수 영역 등화)는 레이크 결합보다 더 나은 비트 오류율(BER) 성능을 제공할 수 있습니다. BER 성능을 더욱 향상시키기 위해 CDTD(Cyclic Delay Transmit Diversity)를 사용할 수 있습니다. CDTD는 등가 전파 경로 수를 늘리기 위해 서로 다른 순환 지연을 추가한 후 서로 다른 안테나에서 동일한 신호를 동시에 전송합니다. DS-CDMA(Direct Sequence Code Division Multiple Access)를 위해 CDTD와 MMSE-FDE를 공동 사용하면 더 큰 주파수 다이버시티 이득을 얻을 수 있지만 FDE 이후의 잔여 칩 간 간섭(ICI)으로 인해 BER 성능 개선이 제한됩니다. 본 논문에서는 CDTD를 이용하여 DS-CDMA를 위한 공동 FDE와 역확산을 제안한다. FDE 이후 잔여 ICI를 억제하기 위해 주파수 영역에서 균등화와 역확산이 동시에 수행됩니다. 주어진 채널 조건에 대한 이론적 조건부 BER 분석이 제시됩니다. BER 분석은 컴퓨터 시뮬레이션을 통해 확인됩니다.
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Tetsuya YAMAMOTO, Kazuki TAKEDA, Fumiyuki ADACHI, "Joint Frequency-Domain Equalization and Despreading for Multi-Code DS-CDMA Using Cyclic Delay Transmit Diversity" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 5, pp. 1563-1572, May 2009, doi: 10.1587/transcom.E92.B.1563.
Abstract: Frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion can provide a better bit error rate (BER) performance than rake combining. To further improve the BER performance, cyclic delay transmit diversity (CDTD) can be used. CDTD simultaneously transmits the same signal from different antennas after adding different cyclic delays to increase the number of equivalent propagation paths. Although a joint use of CDTD and MMSE-FDE for direct sequence code division multiple access (DS-CDMA) achieves larger frequency diversity gain, the BER performance improvement is limited by the residual inter-chip interference (ICI) after FDE. In this paper, we propose joint FDE and despreading for DS-CDMA using CDTD. Equalization and despreading are simultaneously performed in the frequency-domain to suppress the residual ICI after FDE. A theoretical conditional BER analysis is presented for the given channel condition. The BER analysis is confirmed by computer simulation.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.1563/_p
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@ARTICLE{e92-b_5_1563,
author={Tetsuya YAMAMOTO, Kazuki TAKEDA, Fumiyuki ADACHI, },
journal={IEICE TRANSACTIONS on Communications},
title={Joint Frequency-Domain Equalization and Despreading for Multi-Code DS-CDMA Using Cyclic Delay Transmit Diversity},
year={2009},
volume={E92-B},
number={5},
pages={1563-1572},
abstract={Frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion can provide a better bit error rate (BER) performance than rake combining. To further improve the BER performance, cyclic delay transmit diversity (CDTD) can be used. CDTD simultaneously transmits the same signal from different antennas after adding different cyclic delays to increase the number of equivalent propagation paths. Although a joint use of CDTD and MMSE-FDE for direct sequence code division multiple access (DS-CDMA) achieves larger frequency diversity gain, the BER performance improvement is limited by the residual inter-chip interference (ICI) after FDE. In this paper, we propose joint FDE and despreading for DS-CDMA using CDTD. Equalization and despreading are simultaneously performed in the frequency-domain to suppress the residual ICI after FDE. A theoretical conditional BER analysis is presented for the given channel condition. The BER analysis is confirmed by computer simulation.},
keywords={},
doi={10.1587/transcom.E92.B.1563},
ISSN={1745-1345},
month={May},}
부
TY - JOUR
TI - Joint Frequency-Domain Equalization and Despreading for Multi-Code DS-CDMA Using Cyclic Delay Transmit Diversity
T2 - IEICE TRANSACTIONS on Communications
SP - 1563
EP - 1572
AU - Tetsuya YAMAMOTO
AU - Kazuki TAKEDA
AU - Fumiyuki ADACHI
PY - 2009
DO - 10.1587/transcom.E92.B.1563
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 5
JA - IEICE TRANSACTIONS on Communications
Y1 - May 2009
AB - Frequency-domain equalization (FDE) based on the minimum mean square error (MMSE) criterion can provide a better bit error rate (BER) performance than rake combining. To further improve the BER performance, cyclic delay transmit diversity (CDTD) can be used. CDTD simultaneously transmits the same signal from different antennas after adding different cyclic delays to increase the number of equivalent propagation paths. Although a joint use of CDTD and MMSE-FDE for direct sequence code division multiple access (DS-CDMA) achieves larger frequency diversity gain, the BER performance improvement is limited by the residual inter-chip interference (ICI) after FDE. In this paper, we propose joint FDE and despreading for DS-CDMA using CDTD. Equalization and despreading are simultaneously performed in the frequency-domain to suppress the residual ICI after FDE. A theoretical conditional BER analysis is presented for the given channel condition. The BER analysis is confirmed by computer simulation.
ER -