EP1575235A3

OFDM Signal transmission method and apparatus

Abstract

An orthogonal frequency division multiplexing (OFDM) signal transmission apparatus which transmits OFDM signals by using a plurality of transmission antennas includes a subcarrier setting device (106) which sets signals for subcarriers so as to use some of the subcarriers of the OFDM signals as pilot subcarriers to transmit pilot signals and use the remaining subcarriers as data subcarriers to transmit data signals, the subcarrier setting device (106) changing polarities of signals for the pilot subcarriers for each transmission antenna.

EP1575235A3, drawing sheet 1 — Sheet 1 of 1

Term

Term ended

Projected expiry passed 11 March 2025, 1.5 years ago.

Parties

Owner: Kabushiki Kaisha Toshiba
Inventors: Aoki, Tsuguhide, c/oIntellectual Property Division, Minato-ku Tokyo 105-8001, Japan
Seto, Ichiro, c/o Intellectual Property Division, Minato-ku Tokyo 105-8001, Japan
Takeda, Daisuke, c/oIntellectual Property Division, Minato-ku Tokyo 105-8001, Japan
Toyoda, Takehiko, c/o Intellectual Property Div., Minato-ku Tokyo 105-8001, Japan
and 2 more inventorsShow fewer
Sakata, Ren, c/o Intellectual Property Division, Minato-ku Tokyo 105-8001, Japan
Egashira, Yoshimasa, c/oIntellectual Property Div., Minato-ku Tokyo 105-8001, Japan

Examination

Agent: Richardson, Mark Jonathan

Reach

Cites: 1 earlier patent, 4 other works⁠
Family: 31 members in 4 offices⁠US14JP10EP5CN2

Classification

CPC: H04L5/0048H04B7/10H04L1/1829H04L25/0226H04L27/2626H04L27/2647+8 more
IPC: H04L27 26H04L25 02H04B7 10H04L5 02H04J11 00H04L1 18

1 sheet

Sheet 1

Every citation, both ways

Citations
Document	Relation	Office	Category	Cited during	Relevant claims
US2002122381A1	Cites	United States of America	XI	Search report	1,2
SUMEI SUN ET AL: "Training sequence assisted channel estimation for MIMO OFDM", WCNC. IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE, 16 March 2003 (2003-03-16), pages 38 - 43, XP002304707, DOI: 10.1109/WCNC.2003.1200316	Non-patent	–	–	Search report	–
MUENSTER M ET AL: "CO-CHANNEL INTERFERENCE SUPPRESSION ASSISTED ADAPTIVE OFDM IN INTERFERENCE LIMITED ENVIRONMENTS", VTC 1999-FALL. IEEE VTS 50TH. VEHICULAR TECHNOLOGY CONFERENCE. GATEWAY TO THE 21ST. CENTURY COMMUNICATIONS VILLAGE, vol. CONF. 50, 1 September 1999 (1999-09-01), AMSTERDAM, NL, pages 284 - 288, XP000929056, ISBN: 978-0-7803-5436-4	Non-patent	–	–	Search report	–
GAMIER C ET AL: "Performance of an OFDM-SDMA based system in a time-varying multi-path channel", IEEE 54TH VEHICULAR TECHNOLOGY CONFERENCE. VTC FALL 2001., vol. 3, 7 October 2001 (2001-10-07), ATLANTIC CITY, NJ, USA;, pages 1686 - 1690, XP010562251, ISBN: 978-0-7803-7005-0, DOI: 10.1109/VTC.2001.956487	Non-patent	–	–	Search report	–
STRUM, ROBERT D.: "First principles of discrete systems and digital signal processing", 1988, ADDISON-WESLEY PUBLISHING COMPANY, Reading, Massachusetts, U.S.A., ISBN: 0-201-09518-1, XP002672233	Non-patent	–	–	Search report	–

31 members in 4 offices; this record represents the family

This recordMember, by publication datePriority claim

Priority claims10

Priority claims
Document	Office	Kind	Date
2004071732	Japan	–	2004-03-12
2004071732	Japan	A	2004-03-12
2004176096	Japan	–	2004-06-14
2004176096	Japan	A	2004-06-14
2004235349	Japan	–	2004-08-12
2004235349	Japan	A	2004-08-12
2004256247	Japan	–	2004-09-02
2004256247	Japan	A	2004-09-02
2005052949	Japan	–	2005-02-28
2005052949	Japan	A	2005-02-28

Members31

Family members, oldest first
Document	Office	Kind
EP1575235A2	European Patent Office (EPO)	A2	2005-09-14
US2005201268A1	United States of America	A1	2005-09-15
JP2005295489A	Japan	A	2005-10-20
JP2006054706A	Japan	A	2006-02-23
JP2006074523A	Japan	A	2006-03-16
JP2006238292A	Japan	A	2006-09-07
CN1832466A	China	A	2006-09-13
JP4088281B2	Japan	B2	2008-05-21
JP4237680B2	Japan	B2	2009-03-11
JP2009081874A	Japan	A	2009-04-16
JP4327684B2	Japan	B2	2009-09-09
US2009225885A1	United States of America	A1	2009-09-10
JP4405411B2	Japan	B2	2010-01-27
US2010040167A1	United States of America	A1	2010-02-18
US7742533B2	United States of America	B2	2010-06-22
US7782969B2	United States of America	B2	2010-08-24
CN1832466B	China	B	2011-05-04
JP4751438B2	Japan	B2	2011-08-17
US8107556B2	United States of America	B2	2012-01-31
US2012063540A1	United States of America	A1	2012-03-15
EP1575235A3This record	European Patent Office (EPO)	A3	2012-05-16
US8867663B2	United States of America	B2	2014-10-21
US2014376672A1	United States of America	A1	2014-12-25
US9300385B2	United States of America	B2	2016-03-29
US2016164707A1	United States of America	A1	2016-06-09
US2017118056A1	United States of America	A1	2017-04-27
EP3190761A1	European Patent Office (EPO)	A1	2017-07-12
US9923744B2	United States of America	B2	2018-03-20
US10243771B2	United States of America	B2	2019-03-26
EP1575235B1	European Patent Office (EPO)	B1	2020-10-07
EP3190761B1	European Patent Office (EPO)	B1	2022-02-23

48 legal events, as 3 offices reported them to INPADOC

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	Event	Code	Office
2025-04-28	Lapsed in a contracting state [announced via postgrant information from national office to epo]LapsedPG25	PG25	EP
2025-04-02	Patent expired after termination of 20 yearsExpiredPE20	PE20	GB
2025-03-11	Expiry of rightR071	R071	DE
2024-08-16	Withdrawal/refusal of revocation action now finalR040	R040	DE
2024-05-31	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2024-04-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2024-04-30	Annual fee paid to national office [announced via postgrant information from national office to epo]GrantedPGFP	PGFP	EP
2023-11-08	Case pending at federal patent courtR008	R008	DE
2023-11-08	Revocation action filedR039	R039	DE
2023-07-12	Opt-out of the competence of the unified patent court (upc) registeredP01	P01	EP
2022-04-13	Amendments to the register in respect of changes of name or changes affecting rights (sect. 32/1977)REGISTERED BETWEEN 20220317 AND 20220323732E	732E	GB
2021-11-30	Change of applicant/patenteeR081	R081	DE
2021-09-15	No opposition filedOpposition26N	26N	EP
2021-08-13	No opposition filed within time limitOppositionORIGINAL CODE: 0009261PLBE	PLBE	EP
2021-08-13	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: NO OPPOSITION FILED WITHIN TIME LIMITSTAA	STAA	EP
2021-07-08	No opposition filed against granted patent, or epo opposition proceedings concluded without decisionGrantedR097	R097	DE
2020-10-29	Dpma publication of mentioned ep patent grantGrantedR096	R096	DE
2020-10-07	Designated contracting statesAK	AK	EP
2020-10-07	European patent grantedGrantedFG4D	FG4D	GB
2020-09-21	Change of applicant/patenteeR081	R081	DE
2020-09-04	(expected) grantORIGINAL CODE: 0009210GRAA	GRAA	EP
2020-09-04	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: THE PATENT HAS BEEN GRANTEDSTAA	STAA	EP
2020-08-28	Grant fee paidORIGINAL CODE: EPIDOSNIGR3GRAS	GRAS	EP
2020-06-17	Intention to grant announcedINTG	INTG	EP
2020-05-25	Despatch of communication of intention to grant a patentORIGINAL CODE: EPIDOSNIGR1GRAP	GRAP	EP
2020-05-25	Information on the status of an ep patent application or granted ep patentGrantedSTATUS: GRANT OF PATENT IS INTENDEDSTAA	STAA	EP
2019-07-17	Appeal procedure closedAppealORIGINAL CODE: EPIDOSNNOA9EAPBT	APBT	EP
2015-05-26	Appeal reference modifiedAppealORIGINAL CODE: EPIDOSCREFNEAPAF	APAF	EP
2015-05-06	Date of receipt of statement of grounds of appeal recordedAppealORIGINAL CODE: EPIDOSNNOA3EAPBR	APBR	EP
2015-02-27	Appeal reference recordedAppealORIGINAL CODE: EPIDOSNREFNEAPBK	APBK	EP
2015-02-27	Date of receipt of notice of appeal recordedAppealORIGINAL CODE: EPIDOSNNOA2EAPBN	APBN	EP
2013-01-23	Designation fees paidAKX	AKX	EP
2012-06-06	First examination report despatched17Q	17Q	EP
2012-05-16	Designated contracting statesAK	AK	EP
2012-05-16	Request for extension of the european patentAX	AX	EP
2012-05-16	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2012-05-16	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2012-05-16	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2012-05-16	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2012-05-02	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2012-05-02	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2012-05-02	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2012-05-02	Information provided on ipc code assigned before grantRIC1	RIC1	EP
2012-04-13	Search report despatchedORIGINAL CODE: 0009013PUAL	PUAL	EP
2005-09-14	Request for examination filed17P	17P	EP
2005-09-14	Designated contracting statesAK	AK	EP
2005-09-14	Request for extension of the european patentAX	AX	EP
2005-07-29	Public reference made under article 153(3) epc to a published international application that has entered the european phaseORIGINAL CODE: 0009012PUAI	PUAI	EP