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".
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The original paper is in English. Non-English content has been machine-translated and may contain typographical errors or mistranslations. Copyrights notice
A equalização no domínio da frequência (FDE) baseada no critério do erro quadrático médio mínimo (MMSE) pode fornecer um melhor desempenho de taxa de erro de bit (BER) do que a combinação de rake. Para melhorar ainda mais o desempenho do BER, a diversidade de transmissão com atraso cíclico (CDTD) pode ser usada. O CDTD transmite simultaneamente o mesmo sinal de diferentes antenas após adicionar diferentes atrasos cíclicos para aumentar o número de caminhos de propagação equivalentes. Embora o uso conjunto de CDTD e MMSE-FDE para acesso múltiplo por divisão de código de sequência direta (DS-CDMA) obtenha maior ganho de diversidade de frequência, a melhoria do desempenho do BER é limitada pela interferência residual entre chips (ICI) após FDE. Neste artigo, propomos FDE conjunta e desprendimento para DS-CDMA usando CDTD. A equalização e o desprendimento são realizados simultaneamente no domínio da frequência para suprimir o ICI residual após o FDE. Uma análise BER condicional teórica é apresentada para a condição de canal fornecida. A análise BER é confirmada por simulação computacional.
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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},}
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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 -