RADIO BASE STATION APPARATUSES, MOBILE TERMINAL APPARATUSES AND WIRELESS COMMUNICATION METHOD

WIPO Patent Application WO/2011/083794

A1

Provided are radio base station apparatuses, mobile terminal apparatuses and a wireless communication method wherein downlink channel quality determination reference signals are transmitted and received in consideration of the orthogonalization among transmission antennas, the orthogonalization among cells and of highly precise interference estimation. According to the wireless communication method, the radio base station apparatuses generate channel quality determination reference signals, non-orthogonalize the channel quality determination reference signals such that the channel quality determination reference signals are not orthogonal to each other at least among some of the cells, orthogonalize the channel quality determination reference signals among the transmission antennas, and transmit the channel quality determination reference signals to the mobile terminal apparatuses together with control information, and each of the mobile terminal apparatuses receives a downlink signal including the control information and channel quality determination reference signal, uses the control information to extract the channel quality determination reference signal, and uses the channel quality determination reference signal to determine the channel quality.

WO/2012/118343	METHOD AND APPARATUS FOR TRANSMITTING A SOUNDING REFERENCE SIGNAL BY A TERMINAL
JP4910009	Decoding device and decoding method
JPH06311133	SYSTEM AND DEVICE FOR MULTIPLEXING DIGITAL SOUND

KISHIYAMA YOSHIHISA (JP)
TAKEDA KAZUAKI (JP)
OHWATARI YUSUKE (JP)

PCT/JP2011/050035

July 14, 2011

January 05, 2011

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NTT DOCOMO INC (JP)
KISHIYAMA YOSHIHISA (JP)
TAKEDA KAZUAKI (JP)
OHWATARI YUSUKE (JP)

H04J11/00; H04W72/04

ATSUSHI NAGATE ET AL.: "A Study on Resource Allocation Method Considering Inter-Sector Cooperative Transmission", PROCEEDINGS OF THE SOCIETY CONFERENCE OF IEICE, 2009 NEN_TSUSHIN (1), 1 September 2009 (2009-09-01), pages 394, XP008163833
QUALCOMM EUROPE: "Details of CSI-RS", 3GPP TSG RAN WG1 #59 R1-094867, 9 November 2009 (2009-11-09), XP050597855
HUAWEI: "Further design and evaluation on CSI-RS for LTE-A", 3GPP TSG RAN WG1 MEETING #59 R1- 094704, 9 November 2009 (2009-11-09), XP050389104
NTT DOCOMO: "CSI-RS Inter-cell Design Aspects", 3GPP TSG RAN WG1 MEETING #59BIS RL-100498, 18 January 2010 (2010-01-18), XP050418133

AOKI, Hiroyoshi et al. (JP)
Hiroyoshi Aoki (JP)

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