Resource Reduction Method for the LTE-Advanced Uplink ACK/NACK Signal and SR
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概要
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Advanced Evolved Universal Terrestrial Radio Access (Advanced E-UTRA), called LTE-Advanced, has been standardized in the 3rd Generation Partnership Project (3GPP) as a candidate for IMT-Advanced. LTE-Advanced supports spatial orthogonal-resource transmit diversity (SORTD) [1],[2] for ACK/NACK signals and scheduling requests (SRs), which are used to control downlink hybrid automatic repeat requests (HARQs) and manage uplink radio resources based on uplink data traffic, respectively. Both ACK/NACK signals and SRs are carried via a physical uplink control channel (PUCCH) [3], and a common PUCCH format is used for both ACK/NACK signals and SRs. If SORTD is used, the base station assigns mutually orthogonal resources to each antenna included in the user equipment (UE) for ACK/NACK signals and SRs; hence, the number of required resources increases with the number of transmitting antennas in the UE. In this paper, we study the resource reduction method for ACK/NACK signal and SR in case of SORTD using the concept of common resource. In addition, we investigate a phase rotation scheme for common resources to improve the SR detection performance.
- 2011-01-01
著者
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YAMAMOTO Koji
Graduate School of Informatics, Kyoto University
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MURATA Hidekazu
Graduate School of Informatics, Kyoto University
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YOSHIDA Susumu
Graduate School of Informatics, Kyoto University
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IMAMURA Daichi
Panasonic Corporation
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Murata Hidekazu
Kyoto Univ. Kyoto Jpn
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Murata H
The Graduate School Of Science And Engineering Tokyo Institute Of Technology
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YOSHIDA Susumu
the Graduate School of Informatics, Kyoto University
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Yoshida Susumu
Graduate School Of Informatics Kyoto University
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Yoshida S
The Graduate School Of Informatics Kyoto University
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Nakao Seigo
Next-generation Mobile Communications Development Center Tokyo R&d Center Panasonic Corporation
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Yamamoto Koji
Graduate School Of Informatics Kyoto University
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Fukuoka Masaru
Panasonic Mobile Communications R&d Lab. Co. Ltd.
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Murata Hidekazu
Graduate School Of Informatics Kyoto University
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Imamura Daichi
Next-generation Mobile Communications Development Center Tokyo R&d Center Panasonic Corporation
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TAKAGI Kenji
Panasonic Mobile Communications R&D Lab. Co., Ltd.
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Takagi Kenji
Panasonic Mobile Communications R&d Lab. Co. Ltd.
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Yoshida Susumu
Graduate School Of Informatics Eyoto University
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YAMAMOTO Koji
Graduate School of Engineering, Osaka University
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