Title:
RECEIVER
Document Type and Number:
WIPO Patent Application WO/2013/065820
Kind Code:
A1
Abstract:
In order to measure accurate channel state information (CSI) in an interference rejection combining (IRC) receiver (10) that is capable of suppressing intercell interference, this IRC receiver (10) is provided with: a channel estimation unit (11) that estimates a channel matrix (H) by performing a channel estimation process; a transmit weight matrix generation unit (13) that generates a transmit weight matrix (WTX); a covariance matrix estimation unit (12) that estimates a covariance matrix (RI+N) and an interference signal covariance matrix (I) comprising and an interference signal component on the basis of a cell-specific reference signal (CRS); an IRC receive weight generation unit (14) that generates an IRC receive weight (WIRC) on the basis of the channel matrix (H), the transmit weight matrix (WTX) and the covariance matrix (RI+N); and a reception-signal-to-interference-plus-noise ratio (SINR) estimation unit (15) that estimates a reception SINR on the basis of the channel matrix (H), the interference signal covariance matrix (I), the transmit weight matrix (WTX) and the IRC receive weight (WIRC).
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Inventors:
SAGAE YUTA (JP)
OHWATARI YUSUKE (JP)
MIKI NOBUHIKO (JP)
ABE TETSUSHI (JP)
OHWATARI YUSUKE (JP)
MIKI NOBUHIKO (JP)
ABE TETSUSHI (JP)
Application Number:
PCT/JP2012/078468
Publication Date:
May 10, 2013
Filing Date:
November 02, 2012
Export Citation:
Assignee:
NTT DOCOMO INC (JP)
International Classes:
H04J99/00; H04B7/04
Foreign References:
| JP2006319959A | 2006-11-24 | |||
| JP2004248075A | 2004-09-02 |
Other References:
RENESAS MOBILE EUROPE: "Interference aware receiver modeling at system level", 3GPP TSG-RAN WG1#65 R1-111562, 9 May 2011 (2011-05-09), BARCELONA, SPAIN, XP050491209
NTT DOCOMO: "Reference receiver structure for interference mitigation on Enhanced performance requirement for LTE UE", 3GPP TSG-RAN WG4#60BIS R4-115213, 10 October 2011 (2011-10-10) - 14 October 2011 (2011-10-14), XP050544275
NTT DOCOMO: "Influence of Channel Estimation Error on MMSE-IRC Receiver", 3GPP TSG-RAN WG1#65 R1-111639, 9 May 2011 (2011-05-09) - 13 May 2011 (2011-05-13), XP050491275
YUSUKE OWATARI ET AL.: "Investigation of Interference Rejection Combining Receiver to Suppress Inter-cell Interference in LTE- Advanced Downlink", IEICE TECHNICAL REPORT, vol. 111, no. 145, 14 July 2011 (2011-07-14), pages 31 - 36, XP008173049
YUSUKE OWATARI ET AL.: "Investigation on Interference Rejection Combining Receiver in Asynchronous Network for LTE-Advanced Downlink", IEICE TECHNICAL REPORT, vol. 111, no. 260, 19 October 2011 (2011-10-19), pages 273 - 278, XP008173050
YUSUKE OHWATARI ET AL.: "Performance of Advanced Receiver Employing Interference Rejection Combining to Suppress Inter-Cell Interference in LTE-Advanced Downlink", VEHICULAR TECHNOLOGY CONFERENCE, 5 September 2011 (2011-09-05), XP032029680
"(3GPP R4.115213) Reference receiver structure for interference mitigation on Enhanced performance requirement for LTE UE", 3GPP, 10 October 2011 (2011-10-10) - 14 October 2011 (2011-10-14)
NTT DOCOMO: "Reference receiver structure for interference mitigation on Enhanced performance requirement for LTE UE", 3GPP TSG-RAN WG4#60BIS R4-115213, 10 October 2011 (2011-10-10) - 14 October 2011 (2011-10-14), XP050544275
NTT DOCOMO: "Influence of Channel Estimation Error on MMSE-IRC Receiver", 3GPP TSG-RAN WG1#65 R1-111639, 9 May 2011 (2011-05-09) - 13 May 2011 (2011-05-13), XP050491275
YUSUKE OWATARI ET AL.: "Investigation of Interference Rejection Combining Receiver to Suppress Inter-cell Interference in LTE- Advanced Downlink", IEICE TECHNICAL REPORT, vol. 111, no. 145, 14 July 2011 (2011-07-14), pages 31 - 36, XP008173049
YUSUKE OWATARI ET AL.: "Investigation on Interference Rejection Combining Receiver in Asynchronous Network for LTE-Advanced Downlink", IEICE TECHNICAL REPORT, vol. 111, no. 260, 19 October 2011 (2011-10-19), pages 273 - 278, XP008173050
YUSUKE OHWATARI ET AL.: "Performance of Advanced Receiver Employing Interference Rejection Combining to Suppress Inter-Cell Interference in LTE-Advanced Downlink", VEHICULAR TECHNOLOGY CONFERENCE, 5 September 2011 (2011-09-05), XP032029680
"(3GPP R4.115213) Reference receiver structure for interference mitigation on Enhanced performance requirement for LTE UE", 3GPP, 10 October 2011 (2011-10-10) - 14 October 2011 (2011-10-14)
Attorney, Agent or Firm:
MIYOSHI, Hidekazu et al. (JP)
Hidekazu Miyoshi (JP)
Hidekazu Miyoshi (JP)
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