CQI Feedback Overhead Reduction for Multicarrier MIMO Transmission
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概要
- 論文の詳細を見る
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 intersubband 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.
- （社）電子情報通信学会の論文
- 2008-07-01
著者
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Xu Ming
Panasonic Beijing Laboratory, Panasonic R&D Center China Co. Ltd.
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ZENG Erlin
Department of Information and Communication Engineering, Xian Jiaotong University
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ZHU Shihua
Department of Information and Communication Engineering, Xian Jiaotong University
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Zhu Shihua
Xi'an Jiaotong Univ. Xi'an Chn
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Zhu Shihua
Department Of Information And Communication Engineering Xi'an Jiaotong University
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Xu Ming
Panasonic Beijing Laboratory Panasonic R&d Center China Co. Ltd.
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Zhu Shihua
School Of Electronics And Information Engineering Xi'an Jiaotong University
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Zeng Erlin
Department Of Information And Communication Engineering Xi'an Jiaotong University
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Xu Ming
Panasonic R&d Center China Co. Ltd.
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