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
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. No entanto, a interferência residual entre chips (ICI) é produzida após o MMSE-FDE e isso degrada o desempenho do BER. Recentemente, mostramos que o cancelamento do ICI no domínio da frequência pode aproximar o desempenho do BER do limite inferior teórico. Para melhorar ainda mais o desempenho do BER, a técnica de diversidade de antenas de transmissão é eficaz. A diversidade de transmissão com atraso cíclico (CDTD) pode aumentar o número de caminhos equivalentes e, portanto, obter um grande ganho de diversidade de frequência. A diversidade de transmissão espaço-tempo (STTD) pode obter ganho de diversidade de antena devido à codificação espaço-tempo e alcançar um melhor desempenho de BER que o CDTD. O objetivo deste artigo é mostrar que a degradação do desempenho do BER do CDTD se deve principalmente ao ICI residual e que a introdução do cancelamento do ICI dá quase o mesmo desempenho do BER que o STTD. Este estudo fornece um resultado muito importante de que o CDTD tem uma grande vantagem de fornecer um rendimento maior que o STTD. Isto é confirmado por simulação computacional. Os resultados da simulação computacional mostram que o CDTD pode atingir um rendimento maior do que o STTD quando o cancelamento do ICI é introduzido.
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Kazuaki TAKEDA, Yohei KOJIMA, Fumiyuki ADACHI, "Performance Comparison between CDTD and STTD for DS-CDMA/MMSE-FDE with Frequency-Domain ICI Cancellation" in IEICE TRANSACTIONS on Communications,
vol. E92-B, no. 9, pp. 2882-2890, September 2009, doi: 10.1587/transcom.E92.B.2882.
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. However, the residual inter-chip interference (ICI) is produced after MMSE-FDE and this degrades the BER performance. Recently, we showed that frequency-domain ICI cancellation can bring the BER performance close to the theoretical lower bound. To further improve the BER performance, transmit antenna diversity technique is effective. Cyclic delay transmit diversity (CDTD) can increase the number of equivalent paths and hence achieve a large frequency diversity gain. Space-time transmit diversity (STTD) can obtain antenna diversity gain due to the space-time coding and achieve a better BER performance than CDTD. Objective of this paper is to show that the BER performance degradation of CDTD is mainly due to the residual ICI and that the introduction of ICI cancellation gives almost the same BER performance as STTD. This study provides a very important result that CDTD has a great advantage of providing a higher throughput than STTD. This is confirmed by computer simulation. The computer simulation results show that CDTD can achieve higher throughput than STTD when ICI cancellation is introduced.
URL: https://global.ieice.org/en_transactions/communications/10.1587/transcom.E92.B.2882/_p
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@ARTICLE{e92-b_9_2882,
author={Kazuaki TAKEDA, Yohei KOJIMA, Fumiyuki ADACHI, },
journal={IEICE TRANSACTIONS on Communications},
title={Performance Comparison between CDTD and STTD for DS-CDMA/MMSE-FDE with Frequency-Domain ICI Cancellation},
year={2009},
volume={E92-B},
number={9},
pages={2882-2890},
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. However, the residual inter-chip interference (ICI) is produced after MMSE-FDE and this degrades the BER performance. Recently, we showed that frequency-domain ICI cancellation can bring the BER performance close to the theoretical lower bound. To further improve the BER performance, transmit antenna diversity technique is effective. Cyclic delay transmit diversity (CDTD) can increase the number of equivalent paths and hence achieve a large frequency diversity gain. Space-time transmit diversity (STTD) can obtain antenna diversity gain due to the space-time coding and achieve a better BER performance than CDTD. Objective of this paper is to show that the BER performance degradation of CDTD is mainly due to the residual ICI and that the introduction of ICI cancellation gives almost the same BER performance as STTD. This study provides a very important result that CDTD has a great advantage of providing a higher throughput than STTD. This is confirmed by computer simulation. The computer simulation results show that CDTD can achieve higher throughput than STTD when ICI cancellation is introduced.},
keywords={},
doi={10.1587/transcom.E92.B.2882},
ISSN={1745-1345},
month={September},}
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TY - JOUR
TI - Performance Comparison between CDTD and STTD for DS-CDMA/MMSE-FDE with Frequency-Domain ICI Cancellation
T2 - IEICE TRANSACTIONS on Communications
SP - 2882
EP - 2890
AU - Kazuaki TAKEDA
AU - Yohei KOJIMA
AU - Fumiyuki ADACHI
PY - 2009
DO - 10.1587/transcom.E92.B.2882
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E92-B
IS - 9
JA - IEICE TRANSACTIONS on Communications
Y1 - September 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. However, the residual inter-chip interference (ICI) is produced after MMSE-FDE and this degrades the BER performance. Recently, we showed that frequency-domain ICI cancellation can bring the BER performance close to the theoretical lower bound. To further improve the BER performance, transmit antenna diversity technique is effective. Cyclic delay transmit diversity (CDTD) can increase the number of equivalent paths and hence achieve a large frequency diversity gain. Space-time transmit diversity (STTD) can obtain antenna diversity gain due to the space-time coding and achieve a better BER performance than CDTD. Objective of this paper is to show that the BER performance degradation of CDTD is mainly due to the residual ICI and that the introduction of ICI cancellation gives almost the same BER performance as STTD. This study provides a very important result that CDTD has a great advantage of providing a higher throughput than STTD. This is confirmed by computer simulation. The computer simulation results show that CDTD can achieve higher throughput than STTD when ICI cancellation is introduced.
ER -