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
Para sistemas MIMO-OFDM de banda larga, o escalonamento e a adaptação do link são técnicas essenciais para melhorar o desempenho do rendimento. Contudo, em sistemas sem reciprocidade entre os canais de ligação ascendente e de ligação descendente, estas técnicas requerem uma elevada sobrecarga de feedback da informação de indicação de qualidade de canal (CQI). Neste artigo, propomos um novo método de redução de feedback CQI, que é baseado nas técnicas convencionais de compressão que exploram a transformação discreta de cosseno (DCT). A ideia básica é permutar de forma adaptativa as sequências CQI de diferentes fluxos MIMO de acordo com um dos padrões possíveis antes da compressão DCT, de modo que a quantidade de bits de feedback seja minimizada. Os possíveis padrões utilizados são cuidadosamente desenhados de acordo com a nossa análise dos dois tipos de correlações (a correlação inter-stream e a correlação inter-sub-bandas) que existem na transmissão MIMO-OFDM, bem como o seu impacto na eficiência de compressão. Os resultados da simulação verificam que o método proposto pode efetivamente reduzir a sobrecarga de feedback CQI sob diversas condições de canal.
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Erlin ZENG, Shihua ZHU, Ming XU, "CQI Feedback Overhead Reduction for Multicarrier MIMO Transmission" in IEICE TRANSACTIONS on Communications,
vol. E91-B, no. 7, pp. 2310-2320, July 2008, doi: 10.1093/ietcom/e91-b.7.2310.
Abstract: For wideband MIMO-OFDM systems, scheduling and link adaptation are key techniques to improve the throughput performance. However, in systems without reciprocity between the uplink and the downlink channels, these techniques require a high feedback overhead of the channel quality indication (CQI) information. In this paper, we propose a novel CQI feedback reduction method, which is based on the conventional compression techniques exploiting the discrete cosine transformation (DCT). The basic idea is to adaptively permute the CQI sequences of different MIMO streams according to one of the possible patterns before the DCT compression so that the amount of feedback bits is minimized. The possible patterns used are carefully designed according to our analysis of the two types of correlations (the inter-stream correlation and the inter-subband correlation) that exist in MIMO-OFDM transmission, as well as their impact on the compression efficiency. Simulation results verify that the proposed method can effectively reduce the CQI feedback overhead under varying channel conditions.
URL: https://global.ieice.org/en_transactions/communications/10.1093/ietcom/e91-b.7.2310/_p
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@ARTICLE{e91-b_7_2310,
author={Erlin ZENG, Shihua ZHU, Ming XU, },
journal={IEICE TRANSACTIONS on Communications},
title={CQI Feedback Overhead Reduction for Multicarrier MIMO Transmission},
year={2008},
volume={E91-B},
number={7},
pages={2310-2320},
abstract={For wideband MIMO-OFDM systems, scheduling and link adaptation are key techniques to improve the throughput performance. However, in systems without reciprocity between the uplink and the downlink channels, these techniques require a high feedback overhead of the channel quality indication (CQI) information. In this paper, we propose a novel CQI feedback reduction method, which is based on the conventional compression techniques exploiting the discrete cosine transformation (DCT). The basic idea is to adaptively permute the CQI sequences of different MIMO streams according to one of the possible patterns before the DCT compression so that the amount of feedback bits is minimized. The possible patterns used are carefully designed according to our analysis of the two types of correlations (the inter-stream correlation and the inter-subband correlation) that exist in MIMO-OFDM transmission, as well as their impact on the compression efficiency. Simulation results verify that the proposed method can effectively reduce the CQI feedback overhead under varying channel conditions.},
keywords={},
doi={10.1093/ietcom/e91-b.7.2310},
ISSN={1745-1345},
month={July},}
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TY - JOUR
TI - CQI Feedback Overhead Reduction for Multicarrier MIMO Transmission
T2 - IEICE TRANSACTIONS on Communications
SP - 2310
EP - 2320
AU - Erlin ZENG
AU - Shihua ZHU
AU - Ming XU
PY - 2008
DO - 10.1093/ietcom/e91-b.7.2310
JO - IEICE TRANSACTIONS on Communications
SN - 1745-1345
VL - E91-B
IS - 7
JA - IEICE TRANSACTIONS on Communications
Y1 - July 2008
AB - For wideband MIMO-OFDM systems, scheduling and link adaptation are key techniques to improve the throughput performance. However, in systems without reciprocity between the uplink and the downlink channels, these techniques require a high feedback overhead of the channel quality indication (CQI) information. In this paper, we propose a novel CQI feedback reduction method, which is based on the conventional compression techniques exploiting the discrete cosine transformation (DCT). The basic idea is to adaptively permute the CQI sequences of different MIMO streams according to one of the possible patterns before the DCT compression so that the amount of feedback bits is minimized. The possible patterns used are carefully designed according to our analysis of the two types of correlations (the inter-stream correlation and the inter-subband correlation) that exist in MIMO-OFDM transmission, as well as their impact on the compression efficiency. Simulation results verify that the proposed method can effectively reduce the CQI feedback overhead under varying channel conditions.
ER -