DE60118896D1 - Mehrbenutzerdetektion unter verwendung einer adaptiven kombination von gleichzeitiger erfassung und sequentieler interferenzunterdrückung - Google Patents

Mehrbenutzerdetektion unter verwendung einer adaptiven kombination von gleichzeitiger erfassung und sequentieler interferenzunterdrückung

Info

Publication number
DE60118896D1
DE60118896D1 DE60118896T DE60118896T DE60118896D1 DE 60118896 D1 DE60118896 D1 DE 60118896D1 DE 60118896 T DE60118896 T DE 60118896T DE 60118896 T DE60118896 T DE 60118896T DE 60118896 D1 DE60118896 D1 DE 60118896D1
Authority
DE
Germany
Prior art keywords
data
signal
groups
interference suppression
user detection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
DE60118896T
Other languages
English (en)
Other versions
DE60118896T2 (de
Inventor
Mani Misra
Jung-Lin Pan
Ariela Zeira
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
InterDigital Technology Corp
Original Assignee
InterDigital Technology Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by InterDigital Technology Corp filed Critical InterDigital Technology Corp
Publication of DE60118896D1 publication Critical patent/DE60118896D1/de
Application granted granted Critical
Publication of DE60118896T2 publication Critical patent/DE60118896T2/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7097Interference-related aspects
    • H04B1/7103Interference-related aspects the interference being multiple access interference
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7097Interference-related aspects
    • H04B1/7103Interference-related aspects the interference being multiple access interference
    • H04B1/7105Joint detection techniques, e.g. linear detectors
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/709Correlator structure
    • H04B1/7093Matched filter type
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B1/00Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69Spread spectrum techniques
    • H04B1/707Spread spectrum techniques using direct sequence modulation
    • H04B1/7097Interference-related aspects
    • H04B1/7103Interference-related aspects the interference being multiple access interference
    • H04B1/7107Subtractive interference cancellation
    • H04B1/71072Successive interference cancellation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006Arrangements for removing intersymbol interference
    • H04L25/03178Arrangements involving sequence estimation techniques
    • H04L25/03305Joint sequence estimation and interference removal
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00Baseband systems
    • H04L25/02Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03006Arrangements for removing intersymbol interference
    • H04L25/03178Arrangements involving sequence estimation techniques
    • H04L25/03331Arrangements for the joint estimation of multiple sequences

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Ultra Sonic Daignosis Equipment (AREA)
  • Noise Elimination (AREA)
  • Time-Division Multiplex Systems (AREA)
DE60118896T 2000-03-15 2001-02-21 Mehrbenutzerdetektion unter verwendung einer adaptiven kombination von gleichzeitiger erfassung und sequentieler interferenzunterdrückung Expired - Lifetime DE60118896T2 (de)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
US18968000P 2000-03-15 2000-03-15
US189680P 2000-03-15
US20770000P 2000-05-26 2000-05-26
US207700P 2000-05-26
PCT/US2001/005576 WO2001069801A2 (en) 2000-03-15 2001-02-21 Multi-user detection using an adaptive combination of joint detection and successive interference cancellation

Publications (2)

Publication Number Publication Date
DE60118896D1 true DE60118896D1 (de) 2006-05-24
DE60118896T2 DE60118896T2 (de) 2006-12-14

Family

ID=26885406

Family Applications (1)

Application Number Title Priority Date Filing Date
DE60118896T Expired - Lifetime DE60118896T2 (de) 2000-03-15 2001-02-21 Mehrbenutzerdetektion unter verwendung einer adaptiven kombination von gleichzeitiger erfassung und sequentieler interferenzunterdrückung

Country Status (12)

Country Link
US (2) US6963546B2 (de)
EP (1) EP1264415B1 (de)
JP (1) JP2003531513A (de)
KR (2) KR100700345B1 (de)
CN (1) CN1280997C (de)
AT (1) ATE323973T1 (de)
CA (1) CA2403369A1 (de)
DE (1) DE60118896T2 (de)
ES (1) ES2262630T3 (de)
HK (1) HK1053551A1 (de)
TW (1) TW497341B (de)
WO (1) WO2001069801A2 (de)

Families Citing this family (73)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1146156C (zh) * 2000-06-07 2004-04-14 华为技术有限公司 信道估计中训练序列的生成方法
US7315567B2 (en) * 2000-07-10 2008-01-01 Motorola, Inc. Method and apparatus for partial interference cancellation in a communication system
US7061891B1 (en) 2001-02-02 2006-06-13 Science Applications International Corporation Method and system for a remote downlink transmitter for increasing the capacity and downlink capability of a multiple access interference limited spread-spectrum wireless network
US20020172166A1 (en) * 2001-03-22 2002-11-21 Huseyin Arslan Communications system and method for measuring short-term and long-term channel characteristics
EP1386406A4 (de) * 2001-03-30 2009-06-03 Science Applic Int Corp Mehrstufiger empfang von cdma-übertragungen
DE60224672T2 (de) * 2001-06-21 2009-01-22 Koninklijke Philips Electronics N.V. Übertragungsverfahren und einrichtung in einem funkkommunikationsnetz
JP3814502B2 (ja) * 2001-08-09 2006-08-30 松下電器産業株式会社 干渉除去装置及び干渉除去方法
US9236902B2 (en) * 2001-08-28 2016-01-12 Texas Instruments Incorporated Combined equalizer and spread spectrum interference canceller method and implementation for the downlink of CDMA systems
US7006461B2 (en) * 2001-09-17 2006-02-28 Science Applications International Corporation Method and system for a channel selective repeater with capacity enhancement in a spread-spectrum wireless network
US7076263B2 (en) * 2002-02-19 2006-07-11 Qualcomm, Incorporated Power control for partial channel-state information (CSI) multiple-input, multiple-output (MIMO) systems
US6757321B2 (en) 2002-05-22 2004-06-29 Interdigital Technology Corporation Segment-wise channel equalization based data estimation
US7313122B2 (en) * 2002-07-10 2007-12-25 Broadcom Corporation Multi-user carrier frequency offset correction for CDMA systems
TWI335735B (en) * 2002-07-19 2011-01-01 Interdigital Tech Corp Groupwise successive interference cancellation for block transmission with reception diversity
US7136413B2 (en) * 2002-08-23 2006-11-14 Mediatek, Inc. Method and apparatus for generation of reliability information with diversity
US7808937B2 (en) 2005-04-07 2010-10-05 Rambus, Inc. Variable interference cancellation technology for CDMA systems
US7876810B2 (en) * 2005-04-07 2011-01-25 Rambus Inc. Soft weighted interference cancellation for CDMA systems
US8761321B2 (en) 2005-04-07 2014-06-24 Iii Holdings 1, Llc Optimal feedback weighting for soft-decision cancellers
US8005128B1 (en) 2003-09-23 2011-08-23 Rambus Inc. Methods for estimation and interference cancellation for signal processing
US7715508B2 (en) 2005-11-15 2010-05-11 Tensorcomm, Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US8320301B2 (en) 2002-10-25 2012-11-27 Qualcomm Incorporated MIMO WLAN system
US8570988B2 (en) 2002-10-25 2013-10-29 Qualcomm Incorporated Channel calibration for a time division duplexed communication system
US7002900B2 (en) 2002-10-25 2006-02-21 Qualcomm Incorporated Transmit diversity processing for a multi-antenna communication system
US20040081131A1 (en) 2002-10-25 2004-04-29 Walton Jay Rod OFDM communication system with multiple OFDM symbol sizes
US7986742B2 (en) 2002-10-25 2011-07-26 Qualcomm Incorporated Pilots for MIMO communication system
US8170513B2 (en) 2002-10-25 2012-05-01 Qualcomm Incorporated Data detection and demodulation for wireless communication systems
US8208364B2 (en) 2002-10-25 2012-06-26 Qualcomm Incorporated MIMO system with multiple spatial multiplexing modes
WO2004047346A1 (en) * 2002-11-19 2004-06-03 Bae Systems Information And Electronic Systems Integration Inc Bandwidth efficient wirless network modem
US7440490B2 (en) * 2002-12-18 2008-10-21 Anna Kidiyarova-Shevchenko Method and apparatus for multi-user detection using RSFQ successive interference cancellation in CDMA wireless systems
WO2004059501A1 (en) * 2002-12-27 2004-07-15 Unisys Corporation Improvements in a system and method for estimation of computer resource usage by transaction types
CN1723629A (zh) * 2003-01-10 2006-01-18 美商内数位科技公司 通用二阶段数据估测
US7075973B2 (en) * 2003-03-03 2006-07-11 Interdigital Technology Corporation Multiuser detection of differing data rate signals
US7346103B2 (en) * 2003-03-03 2008-03-18 Interdigital Technology Corporation Multi user detection using equalization and successive interference cancellation
US9473269B2 (en) 2003-12-01 2016-10-18 Qualcomm Incorporated Method and apparatus for providing an efficient control channel structure in a wireless communication system
US20050175074A1 (en) * 2004-02-11 2005-08-11 Interdigital Technology Corporation Wireless communication method and apparatus for performing multi-user detection using reduced length channel impulse responses
JP4521633B2 (ja) * 2004-03-12 2010-08-11 直樹 末広 符号分割多重信号の相関分離識別方式
US7583645B2 (en) 2004-09-01 2009-09-01 Intel Corporation Adaptive MAC architecture for wireless networks
CN100401646C (zh) * 2004-09-24 2008-07-09 大唐移动通信设备有限公司 时隙码分多址系统多小区联合检测方法
UA91207C2 (ru) * 2004-12-23 2010-07-12 Квелкомм Инкорпорейтед Совместное подавление помех в канале передачи пилот-сигналов, в канале передачи служебных сигналов, в канале траффика
US8442441B2 (en) * 2004-12-23 2013-05-14 Qualcomm Incorporated Traffic interference cancellation
US7512199B2 (en) * 2005-03-01 2009-03-31 Broadcom Corporation Channel estimation method operable to cancel a dominant disturber signal from a received signal
US7991088B2 (en) 2005-11-15 2011-08-02 Tommy Guess Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US7826516B2 (en) 2005-11-15 2010-11-02 Rambus Inc. Iterative interference canceller for wireless multiple-access systems with multiple receive antennas
US7711075B2 (en) 2005-11-15 2010-05-04 Tensorcomm Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US7466749B2 (en) 2005-05-12 2008-12-16 Qualcomm Incorporated Rate selection with margin sharing
CN100385818C (zh) * 2005-05-26 2008-04-30 上海原动力通信科技有限公司 在时分双工码分多址系统中进行相邻小区联合检测的方法
US20070076791A1 (en) * 2005-07-26 2007-04-05 Interdigital Technology Corporation Approximate cholesky decomposition-based block linear equalizer
US8165186B2 (en) * 2005-08-12 2012-04-24 Qualcomm Incorporated Channel estimation for wireless communication
US7702048B2 (en) * 2005-11-15 2010-04-20 Tensorcomm, Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
US20070110135A1 (en) 2005-11-15 2007-05-17 Tommy Guess Iterative interference cancellation for MIMO-OFDM receivers
EP2095587B1 (de) 2006-11-06 2019-12-25 QUALCOMM Incorporated Mimo detektion mit interferenzunterdrückung von on-time signalkomponenten
US8781043B2 (en) * 2006-11-15 2014-07-15 Qualcomm Incorporated Successive equalization and cancellation and successive mini multi-user detection for wireless communication
US8737451B2 (en) * 2007-03-09 2014-05-27 Qualcomm Incorporated MMSE MUD in 1x mobiles
CN101374041B (zh) * 2007-08-21 2012-07-18 中兴通讯股份有限公司 包括不同小区中多ofdm的兼容系统及频谱共享方法
US8213547B2 (en) 2007-08-31 2012-07-03 The United States Of America As Represented By The Secretary Of The Navy Identification of target signals in radio frequency pulsed environments
US8259860B1 (en) 2007-08-31 2012-09-04 The United States Of America As Represented By The Secretary Of The Navy Identification of target signals in radio frequency pulsed environments
US8576953B2 (en) * 2007-08-31 2013-11-05 The United States Of America As Represented By The Secretary Of The Navy Identification of target signals in radio frequency pulsed environments
US20100011045A1 (en) * 2008-07-11 2010-01-14 James Vannucci Device and method for applying signal weights to signals
US20100011041A1 (en) 2008-07-11 2010-01-14 James Vannucci Device and method for determining signals
US8639996B2 (en) 2008-07-11 2014-01-28 Qualcomm Incorporated Systems and methods for uplink inter-cell interference cancellation using hybrid automatic repeat request (HARQ) retransmissions
US8160014B2 (en) * 2008-09-19 2012-04-17 Nokia Corporation Configuration of multi-periodicity semi-persistent scheduling for time division duplex operation in a packet-based wireless communication system
TWI487297B (zh) * 2009-06-24 2015-06-01 Mstar Semiconductor Inc 干擾波偵測裝置與方法
US8831156B2 (en) 2009-11-27 2014-09-09 Qualcomm Incorporated Interference cancellation for non-orthogonal channel sets
US8230310B2 (en) * 2010-01-15 2012-07-24 Telefonaktiebolaget Lm Ericsson Method and apparatus for received signal processing in a wireless communication receiver
JP5679771B2 (ja) * 2010-11-01 2015-03-04 株式会社Nttドコモ 無線通信装置及び無線通信方法
TWI404346B (zh) * 2010-11-12 2013-08-01 Ind Tech Res Inst 分碼多工為基礎之多用戶偵測方法及系統及其電腦程式產品
CN102098252B (zh) * 2011-01-26 2013-11-06 华为技术有限公司 一种干扰消除方法和装置
CN102420789B (zh) * 2011-04-06 2014-07-09 展讯通信(上海)有限公司 Td-scdma联合检测中本小区窗的判别方法及装置
CN102739283A (zh) * 2011-04-07 2012-10-17 联发科技(新加坡)私人有限公司 时分同步码分多址接收机中基于激活码道选择的联合检测方法
US9014236B2 (en) * 2011-09-28 2015-04-21 Telefonaktiebolaget L M Ericsson (Publ) Method, apparatus, receiver, computer program and storage medium for joint detection
US8897274B2 (en) 2012-08-08 2014-11-25 St-Ericsson Sa Successive interference cancellation stacked branch VAMOS receivers
US9930671B2 (en) * 2014-08-22 2018-03-27 Sony Corporation Device and method for performing non-orthogonal multiplexing
CN104506478A (zh) * 2015-01-09 2015-04-08 南京理工大学 时变多用户mimo-ofdm上行链路基于分组的线性迭代检测器
CN117353876A (zh) * 2022-06-27 2024-01-05 中兴通讯股份有限公司 信号检测方法及其设备、存储介质

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US564964A (en) * 1896-08-04 James a
JP2570967B2 (ja) * 1993-07-08 1997-01-16 日本電気株式会社 Cdma受信機
JP2571008B2 (ja) * 1993-12-24 1997-01-16 日本電気株式会社 適応型最尤系列推定器
CN1082292C (zh) * 1994-02-16 2002-04-03 东芝株式会社 采样相位同步装置及所用的双向最大似然序列估计方式
FI943196A (fi) * 1994-07-04 1996-01-05 Nokia Telecommunications Oy Vastaanottomenetelmä
US20010026578A1 (en) * 1994-12-19 2001-10-04 Takeshi Ando Code division multiple access transmitter and receiver
GB2296625B (en) * 1994-12-23 1999-04-14 Nokia Mobile Phones Ltd Apparatus and method for data transmission
US5659622A (en) * 1995-11-13 1997-08-19 Motorola, Inc. Method and apparatus for suppressing noise in a communication system
US5790549A (en) * 1996-02-29 1998-08-04 Ericsson Inc. Subtractive multicarrier CDMA access methods and systems
DE19616828C2 (de) 1996-04-26 1999-02-25 Siemens Ag Verfahren zur Separierung eines empfangenen Signalgemisches
JP2785804B2 (ja) * 1996-05-30 1998-08-13 日本電気株式会社 移動通信システム
JP2798128B2 (ja) * 1996-08-06 1998-09-17 日本電気株式会社 Cdmaマルチユーザ受信装置
JP3715382B2 (ja) * 1996-08-16 2005-11-09 株式会社東芝 受信装置
US5854784A (en) * 1996-11-05 1998-12-29 Ericsson, Inc. Power-saving method for providing synchronization in a communications system
FI109735B (fi) * 1997-02-28 2002-09-30 Nokia Corp Vastaanottomenetelmä ja vastaanotin
JPH10262024A (ja) * 1997-03-19 1998-09-29 Toshiba Corp 符号分割多元接続方式の受信装置
SG77607A1 (en) * 1997-08-26 2001-01-16 Univ Singapore A multi-user code division multiple access receiver
US6009334A (en) * 1997-11-26 1999-12-28 Telefonaktiebolaget L M Ericsson Method and system for determining position of mobile radio terminals
FR2774831B1 (fr) * 1998-02-11 2000-04-07 Agence Spatiale Europeenne Recepteur adaptatif de signaux pour systeme de communications a acces pultiples par repartition a codes
JP3335900B2 (ja) * 1998-02-27 2002-10-21 松下電器産業株式会社 干渉除去装置及び干渉除去方法
JPH11275061A (ja) * 1998-03-20 1999-10-08 Toshiba Corp 干渉除去受信機
US6301293B1 (en) * 1998-08-04 2001-10-09 Agere Systems Guardian Corp. Detectors for CDMA systems
KR100277697B1 (ko) * 1998-12-02 2001-01-15 정선종 제약조건을 갖는 평균평방 오차 최소화 방법을 이용한 적응형수신 장치
US6775260B1 (en) * 1999-02-25 2004-08-10 Texas Instruments Incorporated Space time transmit diversity for TDD/WCDMA systems

Also Published As

Publication number Publication date
CN1280997C (zh) 2006-10-18
JP2003531513A (ja) 2003-10-21
KR100700345B1 (ko) 2007-03-29
KR20050005565A (ko) 2005-01-13
TW497341B (en) 2002-08-01
CN1429433A (zh) 2003-07-09
US20020018454A1 (en) 2002-02-14
US6963546B2 (en) 2005-11-08
CA2403369A1 (en) 2001-09-20
EP1264415B1 (de) 2006-04-19
KR100490716B1 (ko) 2005-05-24
US20050281214A1 (en) 2005-12-22
EP1264415A2 (de) 2002-12-11
ES2262630T3 (es) 2006-12-01
WO2001069801A3 (en) 2002-05-30
HK1053551A1 (en) 2003-10-24
KR20020082883A (ko) 2002-10-31
WO2001069801A2 (en) 2001-09-20
ATE323973T1 (de) 2006-05-15
DE60118896T2 (de) 2006-12-14

Similar Documents

Publication Publication Date Title
DE60118896D1 (de) Mehrbenutzerdetektion unter verwendung einer adaptiven kombination von gleichzeitiger erfassung und sequentieler interferenzunterdrückung
EP1681775A3 (de) Mehrbenutzerdetektion unter Verwendung einer adaptiven Kombination von gleichzeitiger Erfassung und sequentieller Interferenzunterdrückung
NO20021809D0 (no) Mottaker for multibrukerdeteksjon av CDMA signaler
SE9303213L (sv) Anordning vid fleranvändarsystem
MY129888A (en) Low complexity data detection using fast fourier transform of channel correlation metrix.
DE69020606T2 (de) Spreizspektrumidentifikationssignal für Kommunikationssysteme.
TR200002556T2 (tr) Veri iletişim sistemi
NO20050800L (no) Gruppevis suksessiv interferenskansellering for blokksending med mottaksdiversitet
AU3285999A (en) Method of identifying wireless units
EP0813314A3 (de) Direktsequenzkodeverteilvielfachzugriffsempfänger
MXPA05009318A (es) Deteccion de multiples usuarios utilizando cancelacion de interferencia sucesiva y ecualizacion.
WO2004023696A3 (en) Scaling using gain factors for use in data detection for wireless code division multiple access communication systems
WO2004021581A3 (en) Adaptive pilot interference cancellation in cdma systems
ATE323996T1 (de) Synchronisierung sowie erfassung der modulationsart
DE68909823D1 (de) Datenpaketschaltungsanordnung zum Übertragen von Datenpaketen von einer oder vielen einkommenden Datenübertragungsanlagen zu einer oder vielen ausgehenden Datenübertragungsanlagen.
CA2120598A1 (en) Outbound Signal Detector System and Method
DK1188260T3 (da) Cellesögningsprocedure for tidsopdelt, dupleks kommunikationssystemer anvendende kodeopdelt, multipel adgang
WO2004073159A3 (en) Systems and methods for parallel signal cancellation
DE60327874D1 (de) Effiziente gemeinsame detektion
DK501586A (da) Synkroniseringsgenvinding i et kommunikationssystem
GB2361854A (en) Detection of mutually orthogonal codewords, with intersymbol interference and imperfect timing
EP2239872A3 (de) Codemultiplex-kommunikationssystem und codemultiplex-kommunikationsgerät
NO980879D0 (no) Fremgangsmåte for dataoverföring, samt celledelt radiosystem
CN109272686B (zh) 一种对射式激光入侵探测器的光束身份识别方法
WO2004098088A3 (en) Multiple channel interference cancellation

Legal Events

Date Code Title Description
8364 No opposition during term of opposition