WO1998040971A1 - Multichannel viterbi decoder - Google Patents
Multichannel viterbi decoder Download PDFInfo
- Publication number
- WO1998040971A1 WO1998040971A1 PCT/US1998/004243 US9804243W WO9840971A1 WO 1998040971 A1 WO1998040971 A1 WO 1998040971A1 US 9804243 W US9804243 W US 9804243W WO 9840971 A1 WO9840971 A1 WO 9840971A1
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- WIPO (PCT)
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes
- H04L1/006—Trellis-coded modulation
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/25—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM]
- H03M13/256—Error detection or forward error correction by signal space coding, i.e. adding redundancy in the signal constellation, e.g. Trellis Coded Modulation [TCM] with trellis coding, e.g. with convolutional codes and TCM
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
- H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
- H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
- H03M13/4107—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors implementing add, compare, select [ACS] operations
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/37—Decoding methods or techniques, not specific to the particular type of coding provided for in groups H03M13/03 - H03M13/35
- H03M13/39—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes
- H03M13/41—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors
- H03M13/4161—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors implementing path management
- H03M13/4169—Sequence estimation, i.e. using statistical methods for the reconstruction of the original codes using the Viterbi algorithm or Viterbi processors implementing path management using traceback
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/65—Purpose and implementation aspects
- H03M13/6502—Reduction of hardware complexity or efficient processing
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/65—Purpose and implementation aspects
- H03M13/6502—Reduction of hardware complexity or efficient processing
- H03M13/6505—Memory efficient implementations
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M13/00—Coding, decoding or code conversion, for error detection or error correction; Coding theory basic assumptions; Coding bounds; Error probability evaluation methods; Channel models; Simulation or testing of codes
- H03M13/65—Purpose and implementation aspects
- H03M13/6569—Implementation on processors, e.g. DSPs, or software implementations
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details 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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0009—Systems modifying transmission characteristics according to link quality, e.g. power backoff by adapting the channel coding
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0046—Code rate detection or code type detection
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0052—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables
- H04L1/0053—Realisations of complexity reduction techniques, e.g. pipelining or use of look-up tables specially adapted for power saving
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0045—Arrangements at the receiver end
- H04L1/0054—Maximum-likelihood or sequential decoding, e.g. Viterbi, Fano, ZJ algorithms
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
- H04L1/0059—Convolutional codes
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0072—Error control for data other than payload data, e.g. control data
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0075—Transmission of coding parameters to receiver
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/08—Arrangements for detecting or preventing errors in the information received by repeating transmission, e.g. Verdan system
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/0262—Arrangements for detecting the data rate of an incoming signal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B2201/00—Indexing scheme relating to details of transmission systems not covered by a single group of H04B3/00 - H04B13/00
- H04B2201/69—Orthogonal indexing scheme relating to spread spectrum techniques in general
- H04B2201/707—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation
- H04B2201/70703—Orthogonal indexing scheme relating to spread spectrum techniques in general relating to direct sequence modulation using multiple or variable rates
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L25/00—Baseband systems
- H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
- H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
- H04L25/03006—Arrangements for removing intersymbol interference
- H04L2025/03592—Adaptation methods
- H04L2025/03598—Algorithms
- H04L2025/03675—Blind algorithms using gradient methods
Abstract
Description
Claims
Priority Applications (7)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP98908938A EP0966796B1 (en) | 1997-03-12 | 1998-03-04 | Multichannel communications system with decoder |
DE69807850T DE69807850T2 (en) | 1997-03-12 | 1998-03-04 | MULTI-CHANNEL COMMUNICATION UNIT WITH DECODER |
DE0966796T DE966796T1 (en) | 1997-03-12 | 1998-03-04 | MULTI-CHANNEL VITERBI DECODER |
DK06012665T DK1696584T3 (en) | 1997-03-12 | 1998-03-04 | Multi-channel Viterbi decoder |
AT98908938T ATE224118T1 (en) | 1997-03-12 | 1998-03-04 | MULTI-CHANNEL COMMUNICATION UNIT WITH DECODER |
JP53962498A JP3988956B2 (en) | 1997-03-12 | 1998-03-04 | Multi-channel Viterbi decoder |
HK00103665A HK1024357A1 (en) | 1997-03-12 | 2000-06-19 | Multichannel communications system with decoder |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US4047797P | 1997-03-12 | 1997-03-12 | |
US60/040,477 | 1997-03-12 | ||
US08/871,008 US6005898A (en) | 1997-03-12 | 1997-06-06 | Multichannel viterbi decoder |
US08/871,008 | 1997-06-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1998040971A1 true WO1998040971A1 (en) | 1998-09-17 |
Family
ID=26717094
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US1998/004243 WO1998040971A1 (en) | 1997-03-12 | 1998-03-04 | Multichannel viterbi decoder |
Country Status (10)
Country | Link |
---|---|
US (2) | US6005898A (en) |
EP (8) | EP1161017B1 (en) |
JP (1) | JP3988956B2 (en) |
CN (2) | CN1278498C (en) |
AT (7) | ATE382208T1 (en) |
DE (7) | DE966796T1 (en) |
DK (6) | DK1439640T3 (en) |
ES (8) | ES2172486T3 (en) |
HK (7) | HK1024357A1 (en) |
WO (1) | WO1998040971A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1370037A3 (en) * | 2002-04-09 | 2007-05-30 | Telogy Networks Inc. | PCM upstream data transmission server |
Families Citing this family (27)
Publication number | Priority date | Publication date | Assignee | Title |
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US20060262832A1 (en) * | 1997-03-12 | 2006-11-23 | Interdigital Technology Corporation | Convolutionally encoding and decoding multiple data streams |
US6404828B2 (en) * | 1997-03-12 | 2002-06-11 | Interdigital Technology Corporation | Multichannel decoder |
US6301683B1 (en) * | 1997-06-09 | 2001-10-09 | Vocal Technologies, Ltd. | Trellis encoding technique for PCM modems |
US6400966B1 (en) * | 1997-10-07 | 2002-06-04 | Telefonaktie Bolaget Lm Ericsson (Publ) | Base station architecture for a mobile communications system |
US6259687B1 (en) * | 1997-10-31 | 2001-07-10 | Interdigital Technology Corporation | Communication station with multiple antennas |
US6112325A (en) * | 1998-01-23 | 2000-08-29 | Dspc Technologies, Ltd. | Method and device for detecting rate |
JP4048510B2 (en) * | 1998-03-05 | 2008-02-20 | 富士通株式会社 | Radio base station in CDMA mobile communication system |
FI104774B (en) * | 1998-03-23 | 2000-03-31 | Nokia Networks Oy | Method and apparatus for modulation detection |
US6269130B1 (en) * | 1998-08-04 | 2001-07-31 | Qualcomm Incorporated | Cached chainback RAM for serial viterbi decoder |
US6735724B1 (en) * | 1999-04-08 | 2004-05-11 | Texas Instruments Incorporated | Detection error estimation and method |
US8050198B2 (en) | 1999-05-24 | 2011-11-01 | Qualcomm Incorporated | Method and system for scheduling data transmission in communication systems |
KR100346152B1 (en) | 1999-09-17 | 2002-08-01 | 주식회사 하이닉스반도체 | A mobile communication base station transciever system of code division multiple access |
IL146875A0 (en) * | 2000-03-08 | 2002-08-14 | Advanced Risc Mach Ltd | Viterbi decoding with path metric update implemented in the order of bit-slices |
US20020031195A1 (en) * | 2000-09-08 | 2002-03-14 | Hooman Honary | Method and apparatus for constellation decoder |
CN100438389C (en) * | 2001-06-21 | 2008-11-26 | 皇家菲利浦电子有限公司 | MIMO transmission system in radio communications network |
JP3612563B2 (en) * | 2001-09-07 | 2005-01-19 | 独立行政法人情報通信研究機構 | Multi-mode block coding modulation demodulation method |
US7046747B2 (en) * | 2002-04-16 | 2006-05-16 | Intel Corporation | Viterbi decoder and decoding method using rescaled branch metrics in add-compare-select operations |
CN100399706C (en) * | 2002-08-14 | 2008-07-02 | 联发科技股份有限公司 | Wittbi decoder with partly response maximum possibility channel |
US7295622B2 (en) * | 2003-05-09 | 2007-11-13 | Texas Instruments Incorporated | System and method for information decoding using batched processing of independent parameters |
US7117427B2 (en) * | 2003-07-09 | 2006-10-03 | Texas Instruments Incorporated | Reduced complexity decoding for trellis coded modulation |
EP1511178A1 (en) * | 2003-09-01 | 2005-03-02 | Alcatel | A method of decoding a data word |
US7434148B2 (en) * | 2004-12-30 | 2008-10-07 | Freescale Semiconductor, Inc. | Track buffer in a parallel decoder |
JP2007300400A (en) * | 2006-04-28 | 2007-11-15 | Matsushita Electric Ind Co Ltd | Transmission circuit, transmission method, and communication equipment using the same |
US8165224B2 (en) * | 2007-03-22 | 2012-04-24 | Research In Motion Limited | Device and method for improved lost frame concealment |
US8856630B2 (en) * | 2008-06-10 | 2014-10-07 | Telefonaktiebolaget L M Ericsson (Publ) | Continuous parallel Viterbi decoder |
US8477879B2 (en) * | 2009-12-23 | 2013-07-02 | Texas Instruments Incorporated | System and method for bi-phase modulation decoding |
RU2421900C1 (en) | 2010-02-27 | 2011-06-20 | Тимур Георгиевич Келин | Multi-channel serial viterbi decoder |
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WO1995008888A1 (en) * | 1993-09-24 | 1995-03-30 | Qualcomm Incorporated | Multirate serial viterbi decoder for code division multiple access system applications |
EP0712219A2 (en) * | 1994-11-14 | 1996-05-15 | Nec Corporation | Variable transmission bit rate discrimination method and apparatus |
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US4709377A (en) * | 1985-03-13 | 1987-11-24 | Paradyne | Viterbi decoder for wireline modems |
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JP2554219B2 (en) * | 1991-11-26 | 1996-11-13 | 日本電信電話株式会社 | Digital signal superposition transmission method |
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MY112371A (en) * | 1993-07-20 | 2001-05-31 | Qualcomm Inc | System and method for orthogonal spread spectrum sequence generation in variable data rate systems |
CA2174343C (en) * | 1993-11-01 | 2003-10-14 | Ephraim Zehavi | Method and apparatus for the transmission of variable rate digital data |
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US5465269A (en) * | 1994-02-02 | 1995-11-07 | Motorola, Inc. | Method and apparatus for encoding and decoding a supplementary signal |
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JP2701761B2 (en) * | 1994-11-02 | 1998-01-21 | 日本電気株式会社 | Transmission bit rate determination method and apparatus |
US5497401A (en) * | 1994-11-18 | 1996-03-05 | Thomson Consumer Electronics, Inc. | Branch metric computer for a Viterbi decoder of a punctured and pragmatic trellis code convolutional decoder suitable for use in a multi-channel receiver of satellite, terrestrial and cable transmitted FEC compressed-digital television data |
JP3169522B2 (en) * | 1995-01-19 | 2001-05-28 | 沖電気工業株式会社 | Data receiving device |
TW347616B (en) * | 1995-03-31 | 1998-12-11 | Qualcomm Inc | Method and apparatus for performing fast power control in a mobile communication system a method and apparatus for controlling transmission power in a mobile communication system is disclosed. |
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1997
- 1997-06-06 US US08/871,008 patent/US6005898A/en not_active Expired - Lifetime
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1998
- 1998-03-04 ES ES01120761T patent/ES2172486T3/en not_active Expired - Lifetime
- 1998-03-04 DE DE0966796T patent/DE966796T1/en active Pending
- 1998-03-04 JP JP53962498A patent/JP3988956B2/en not_active Expired - Fee Related
- 1998-03-04 AT AT06012665T patent/ATE382208T1/en not_active IP Right Cessation
- 1998-03-04 DE DE69825328T patent/DE69825328T2/en not_active Expired - Lifetime
- 1998-03-04 AT AT01120761T patent/ATE268074T1/en not_active IP Right Cessation
- 1998-03-04 DE DE69807850T patent/DE69807850T2/en not_active Expired - Lifetime
- 1998-03-04 DK DK04009884T patent/DK1439640T3/en active
- 1998-03-04 EP EP01120761A patent/EP1161017B1/en not_active Expired - Lifetime
- 1998-03-04 EP EP01120762A patent/EP1161018B1/en not_active Expired - Lifetime
- 1998-03-04 EP EP04009884A patent/EP1439640B1/en not_active Expired - Lifetime
- 1998-03-04 ES ES07025032T patent/ES2386278T3/en not_active Expired - Lifetime
- 1998-03-04 ES ES10179535T patent/ES2387708T3/en not_active Expired - Lifetime
- 1998-03-04 CN CNB031079385A patent/CN1278498C/en not_active Expired - Fee Related
- 1998-03-04 DK DK06012665T patent/DK1696584T3/en active
- 1998-03-04 ES ES01120762T patent/ES2172487T3/en not_active Expired - Lifetime
- 1998-03-04 DK DK10179535.9T patent/DK2259440T3/en active
- 1998-03-04 CN CN98803254A patent/CN1109414C/en not_active Expired - Fee Related
- 1998-03-04 EP EP06012665A patent/EP1696584B1/en not_active Expired - Lifetime
- 1998-03-04 DK DK01120763T patent/DK1161019T3/en active
- 1998-03-04 EP EP98908938A patent/EP0966796B1/en not_active Expired - Lifetime
- 1998-03-04 EP EP01120763A patent/EP1161019B1/en not_active Expired - Lifetime
- 1998-03-04 AT AT07025032T patent/ATE555552T1/en active
- 1998-03-04 ES ES06012665T patent/ES2300083T3/en not_active Expired - Lifetime
- 1998-03-04 EP EP07025032A patent/EP1895671B1/en not_active Expired - Lifetime
- 1998-03-04 WO PCT/US1998/004243 patent/WO1998040971A1/en active IP Right Grant
- 1998-03-04 DE DE69838922T patent/DE69838922T2/en not_active Expired - Lifetime
- 1998-03-04 ES ES01120763T patent/ES2172488T3/en not_active Expired - Lifetime
- 1998-03-04 AT AT01120762T patent/ATE272271T1/en not_active IP Right Cessation
- 1998-03-04 DE DE69824208T patent/DE69824208T2/en not_active Expired - Lifetime
- 1998-03-04 DK DK01120761T patent/DK1161017T3/en active
- 1998-03-04 DE DE69824051T patent/DE69824051T2/en not_active Expired - Lifetime
- 1998-03-04 EP EP10179535A patent/EP2259440B1/en not_active Expired - Lifetime
- 1998-03-04 DK DK01120762T patent/DK1161018T3/en active
- 1998-03-04 ES ES04009884T patent/ES2268532T3/en not_active Expired - Lifetime
- 1998-03-04 AT AT98908938T patent/ATE224118T1/en not_active IP Right Cessation
- 1998-03-04 DE DE69835177T patent/DE69835177T2/en not_active Expired - Lifetime
- 1998-03-04 AT AT04009884T patent/ATE332592T1/en not_active IP Right Cessation
- 1998-03-04 ES ES98908938T patent/ES2146560T3/en not_active Expired - Lifetime
- 1998-03-04 AT AT01120763T patent/ATE267483T1/en not_active IP Right Cessation
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1999
- 1999-11-01 US US09/432,038 patent/US6256339B1/en not_active Expired - Lifetime
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2000
- 2000-06-19 HK HK00103665A patent/HK1024357A1/en not_active IP Right Cessation
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2002
- 2002-04-15 HK HK02102835.3A patent/HK1041386B/en not_active IP Right Cessation
- 2002-04-15 HK HK02102836.2A patent/HK1041387B/en not_active IP Right Cessation
- 2002-04-15 HK HK02102834.4A patent/HK1041385B/en not_active IP Right Cessation
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2005
- 2005-01-21 HK HK05100605A patent/HK1067253A1/en not_active IP Right Cessation
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2007
- 2007-02-27 HK HK07102208A patent/HK1094840A1/en not_active IP Right Cessation
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2008
- 2008-09-05 HK HK08109926.2A patent/HK1114509A1/en not_active IP Right Cessation
Patent Citations (2)
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