RADIO TRANSMITTER, BASE STATION DEVICE, RADIO TRANSMISSION METHOD, AND CONTROL PROGRAM AND INTEGRATED CIRCUIT OF BASE STATION DEVICE

Japanese Patent JP2011166536

A

To reduce the amount of control information for transmission when applying frequency selective precoding to a multi-carrier signal.

A radio transmitter divides a frequency signal into a plurality of clusters, arranges the divided clusters on a frequency axis, and multiplies a precoding matrix by each cluster arranged on the frequency axis. The radio transmitter restricts the number of precoding matrixes to be selected based on a relation between a precoding matrix multiplied by any of the clusters and a precoding matrix multiplied by another cluster. It also restricts the number of precoding matrixes to be selected, based on a relation between a precoding matrix multiplied by any one of the clusters and a precoding matrix multiplied by the adjacent other cluster. It also restricts the number of precoding matrixes to be selected according to frequency correlation between any one of the clusters and the adjacent other cluster.

YOKOMAKURA KAZUNARI
HAMAGUCHI YASUHIRO
NAKAMURA OSAMU
GOTO JUNGO
TAKAHASHI HIROKI

JP2010028130A

August 25, 2011

February 10, 2010

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SHARP KK

H04J11/00; H04B7/04; H04J99/00

WO2008131352A1	2008-10-30
WO2011083774A1	2011-07-14

JPN6011005505; 中村理、秋元陽介、横枕一成、後藤淳悟、高橋宏樹、浜口泰弘: '"Ｃｌｕｓｔｅｒｅｄ　ＤＦＴ-Ｓ-ＯＦＤＭにおける周波数選択プリコーディングに関する検討"' Ｔｅｃｈｎｉｃａｌ　ｒｅｐｏｒｔ　ｏｆ　ＩＥＩＣＥ．　ＲＣＳ ＲＣＳ２００９-１７５，　ｖｏｌ．１０９，　Ｎｏ．３４１, 20091217, ｐｐ．４９-５４, 社団法人電子情報通信学会
JPN6011005507; Ｓｈａｒｐ: '"Ｃｏｎｓｉｄｅｒａｔｉｏｎｓ　ｏｎ　ｍｕｌｔｉｐｌｅ　ｐｒｅｃｏｄｉｎｇ　ｓｃｈｅｍｅ　ｆｏｒ　ｃｌｕｓｔｅｒｅｄ　ＤＦＴ-Ｓ-ＯＦＤＭ"' ３ＧＰＰ　ＴＳＧ　ＲＡＮ　ＷＧ１　Ｍｅｅｔｉｎｇ　＃５８ｂｉｓ Ｒ１-０９４０２９, 20091016

Takeo Fukuchi
Yoichi Shirakawa

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