JP4173100B2 - 信号干渉除去 - Google Patents

信号干渉除去 Download PDF

Info

Publication number
JP4173100B2
JP4173100B2 JP2003533508A JP2003533508A JP4173100B2 JP 4173100 B2 JP4173100 B2 JP 4173100B2 JP 2003533508 A JP2003533508 A JP 2003533508A JP 2003533508 A JP2003533508 A JP 2003533508A JP 4173100 B2 JP4173100 B2 JP 4173100B2
Authority
JP
Japan
Prior art keywords
signal
interference
digital
fingers
finger
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
JP2003533508A
Other languages
English (en)
Japanese (ja)
Other versions
JP2005505970A (ja
JP2005505970A5 (https=
Inventor
ジョン トーマス
ウルフガング コーバー
エリック オルソン
ロバート クルムヴィエダ
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.)
Tensorcom Inc
Original Assignee
Tensorcom Inc
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 Tensorcom Inc filed Critical Tensorcom Inc
Publication of JP2005505970A publication Critical patent/JP2005505970A/ja
Publication of JP2005505970A5 publication Critical patent/JP2005505970A5/ja
Application granted granted Critical
Publication of JP4173100B2 publication Critical patent/JP4173100B2/ja
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7113—Determination of path profile
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7107—Subtractive interference cancellation
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/7103—Interference-related aspects the interference being multiple access interference
    • H04B1/7105—Joint detection techniques, e.g. linear detectors
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • 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
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7115—Constructive combining of multi-path signals, i.e. RAKE receivers
    • H04B1/7117—Selection, re-selection, allocation or re-allocation of paths to fingers, e.g. timing offset control of allocated fingers
    • 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
    • H04B2001/70706—Spread spectrum techniques using direct sequence modulation using a code tracking loop, e.g. a delay locked loop

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Noise Elimination (AREA)
  • Mobile Radio Communication Systems (AREA)
JP2003533508A 2001-10-02 2002-10-01 信号干渉除去 Expired - Lifetime JP4173100B2 (ja)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US32619901P 2001-10-02 2001-10-02
US09/988,218 US6711219B2 (en) 2000-12-04 2001-11-19 Interference cancellation in a signal
PCT/US2002/031025 WO2003030440A1 (en) 2001-10-02 2002-10-01 Interference cancellation in a signal

Publications (3)

Publication Number Publication Date
JP2005505970A JP2005505970A (ja) 2005-02-24
JP2005505970A5 JP2005505970A5 (https=) 2008-07-31
JP4173100B2 true JP4173100B2 (ja) 2008-10-29

Family

ID=26985299

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2003533508A Expired - Lifetime JP4173100B2 (ja) 2001-10-02 2002-10-01 信号干渉除去

Country Status (6)

Country Link
US (1) US6711219B2 (https=)
EP (1) EP1442551B1 (https=)
JP (1) JP4173100B2 (https=)
KR (1) KR20040066098A (https=)
CN (1) CN100336335C (https=)
WO (1) WO2003030440A1 (https=)

Families Citing this family (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100762577B1 (ko) * 2000-11-29 2007-10-01 엘지전자 주식회사 코드분할다중접속의 새로운 직교 확산코드 생성 방법 및이용방법
US20020131534A1 (en) * 2001-02-07 2002-09-19 Masayuki Ariyoshi System and method for multistage interference cancellation
FR2822568B1 (fr) * 2001-03-22 2003-06-06 Mitsubishi Electric Inf Tech Methode et dispositif d'egalisation de type gmmse
GB0107578D0 (en) * 2001-03-27 2001-05-16 Koninl Philips Electronics Nv Radio communication system
DE60107407T2 (de) * 2001-07-05 2005-05-19 Mitsubishi Electric Information Technology Centre Europe B.V. Mehrbenutzerdetektion in einem MC-CDMA Telekommunikationssystem
US7088955B2 (en) * 2001-07-16 2006-08-08 Qualcomm Inc. Method and apparatus for acquiring and tracking pilots in a CDMA communication system
EP1300977A1 (en) * 2001-10-04 2003-04-09 Mitsubishi Electric Information Technology Centre Europe B.V. Parallel interference cancellation in an MC-CDMA telecommunication system
FR2837638B1 (fr) * 2002-03-22 2006-07-14 Thales Sa Procede de traitement de signal en presence d'interferences
US7099377B2 (en) * 2002-04-03 2006-08-29 Stmicroelectronics N.V. Method and device for interference cancellation in a CDMA wireless communication system
US7808937B2 (en) * 2005-04-07 2010-10-05 Rambus, Inc. Variable interference cancellation technology for CDMA systems
US8761321B2 (en) * 2005-04-07 2014-06-24 Iii Holdings 1, Llc Optimal feedback weighting for soft-decision cancellers
US8179946B2 (en) * 2003-09-23 2012-05-15 Rambus Inc. Systems and methods for control of advanced receivers
US7715508B2 (en) 2005-11-15 2010-05-11 Tensorcomm, Incorporated Iterative interference cancellation using mixed feedback weights and stabilizing step sizes
FR2856143B1 (fr) * 2003-06-13 2005-09-23 Centre Nat Etd Spatiales Procede et dispositif de demodulation de signaux de radionavigation par satellite
US7369534B2 (en) * 2003-08-27 2008-05-06 Qualcomm Incorporated Reducing search time using known scrambling code offsets
GB2438347B8 (en) * 2005-02-25 2009-04-08 Data Fusion Corp Mitigating interference in a signal
CN1832387A (zh) * 2005-03-10 2006-09-13 松下电器产业株式会社 多输入多输出无线通信系统中的多输入多输出检测方法和装置
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
US20060229051A1 (en) * 2005-04-07 2006-10-12 Narayan Anand P Interference selection and cancellation for CDMA communications
US20070110135A1 (en) * 2005-11-15 2007-05-17 Tommy Guess Iterative interference cancellation for MIMO-OFDM receivers
US7623602B2 (en) * 2005-11-15 2009-11-24 Tensorcomm, Inc. Iterative interference canceller for wireless multiple-access systems employing closed loop transmit diversity
US7545893B2 (en) * 2005-11-28 2009-06-09 Telefonaktiebolaget L M Ericsson (Publ) Single antenna interference cancellation via complement subspace projection in spatial-temporal expansion of noise estimation
KR100758305B1 (ko) * 2005-12-08 2007-09-12 한국전자통신연구원 위성 디지털 비디오 방송 시스템에서 주파수 오프셋을보정하는 장치 및 방법
US8098720B2 (en) * 2006-10-06 2012-01-17 Stmicroelectronics S.R.L. Method and apparatus for suppressing adjacent channel interference and multipath propagation signals and radio receiver using said apparatus
US8520721B2 (en) 2008-03-18 2013-08-27 On-Ramp Wireless, Inc. RSSI measurement mechanism in the presence of pulsed jammers
US8477830B2 (en) 2008-03-18 2013-07-02 On-Ramp Wireless, Inc. Light monitoring system using a random phase multiple access system
US8958460B2 (en) 2008-03-18 2015-02-17 On-Ramp Wireless, Inc. Forward error correction media access control system
US20100195553A1 (en) * 2008-03-18 2010-08-05 Myers Theodore J Controlling power in a spread spectrum system
TWI363513B (en) * 2008-03-21 2012-05-01 Ralink Technology Corp Signal processing device and signal processing method
KR101342801B1 (ko) 2008-12-05 2013-12-19 에릭슨 엘지 주식회사 이동통신 시스템에서 코드 확장을 이용한 채널 추정 장치 및 방법
US8295258B2 (en) * 2009-02-17 2012-10-23 Wavion, Ltd Enhancing WLAN performance in the presence of interference
US8363699B2 (en) 2009-03-20 2013-01-29 On-Ramp Wireless, Inc. Random timing offset determination
CN101651482B (zh) * 2009-09-01 2012-12-19 中国电子科技集团公司第五十四研究所 一种适用于空间分集接收系统降低通道干扰的中频放大器
FR2962228B1 (fr) * 2010-07-01 2012-07-27 Inst Telecom Telecom Sudparis Procede de reduction de l'eblouissement d'un recepteur au sein d'un systeme, notamment de geolocalisation.
CN102243309B (zh) * 2011-03-07 2017-11-10 容宝华 Gnss互相关干扰抑制方法和装置
US9344303B1 (en) * 2012-01-04 2016-05-17 Marvell International Ltd. Adaptive signal covariance estimation for MMSE equalization
EP2842384A4 (en) * 2012-04-26 2015-12-16 Propagation Res Associates Inc METHOD AND SYSTEM FOR USING ORTHOGONAL SPACE PROJECTIONS FOR INTERFERENCE REDUCTION
US9401741B2 (en) 2012-04-26 2016-07-26 Propagation Research Associates, Inc. Methods and systems for mitigating signal interference
JP6085976B2 (ja) * 2013-01-25 2017-03-01 富士通株式会社 信号処理回路及び信号処理方法
FR3012622B1 (fr) * 2013-10-31 2019-08-09 Thales Procede de detection d'interferences dans un signal de radio-navigation par satellite
CN104836633B (zh) * 2014-02-12 2018-04-17 电信科学技术研究院 一种信号处理的方法和设备
US9660743B1 (en) 2014-08-27 2017-05-23 Marvell International Ltd. Channel estimation by searching over channel response candidates having dominant components
US10571224B2 (en) 2015-05-04 2020-02-25 Propagation Research Associates, Inc. Systems, methods and computer-readable media for improving platform guidance or navigation using uniquely coded signals
RU2686643C1 (ru) * 2017-12-05 2019-04-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Рязанский государственный радиотехнический университет" Вычислитель для подавления помех
RU2686634C1 (ru) * 2017-12-11 2019-04-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Рязанский государственный радиотехнический университет" Вычислитель для режекторной фильтрации помех
RU2686631C1 (ru) * 2017-12-11 2019-04-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Рязанский государственный радиотехнический университет" Вычислитель для компенсации помех
RU2686633C1 (ru) * 2017-12-11 2019-04-29 Федеральное государственное бюджетное образовательное учреждение высшего образования "Рязанский государственный радиотехнический университет" Вычислитель для режекторной фильтрации помех
CN110518933B (zh) * 2018-05-22 2023-03-07 北京三星通信技术研究有限公司 全双工收发机、电子设备和交互方法
US11522654B2 (en) 2018-05-22 2022-12-06 Samsung Electronics Co., Ltd. Configuring physical resources for interference cancellation
CN109802719B (zh) * 2019-01-03 2020-07-17 长沙天仪空间科技研究院有限公司 一种基于抑制窄带干扰的卫星通信系统
CN113325374A (zh) * 2020-02-28 2021-08-31 加特兰微电子科技(上海)有限公司 抗干扰方法、装置、雷达系统及存储介质
US11018705B1 (en) 2020-07-17 2021-05-25 Propagation Research Associates, Inc. Interference mitigation, target detection, location and measurement using separable waveforms transmitted from spatially separated antennas
WO2022201455A1 (ja) * 2021-03-25 2022-09-29 三菱電機株式会社 レーダ装置
CN119064868B (zh) * 2024-09-14 2025-08-29 中国人民解放军海军工程大学 一种雷达非合作干扰对消装置及方法

Family Cites Families (46)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5553062A (en) 1993-04-22 1996-09-03 Interdigital Communication Corporation Spread spectrum CDMA interference canceler system and method
US5412390A (en) * 1993-08-24 1995-05-02 Delfin Systems Apparatus and method for reducing co-channel interference from a radio frequency signal
FI102797B (fi) 1994-10-07 1999-02-15 Nokia Mobile Phones Ltd Signaalin ilmaisumenetelmä TDMA-matkaviestinjärjestelmän vastaanottime ssa sekä menetelmän toteuttava vastaanotin
FI99184C (fi) 1994-11-28 1997-10-10 Nokia Telecommunications Oy Menetelmä käytettävissä olevien taajuuskaistojen jakamiseksi eri soluihin TDMA-solukkoradiojärjestelmässä ja TDMA-solukkoradiojärjestelmä
US5600670A (en) * 1994-12-21 1997-02-04 Trimble Navigation, Ltd. Dynamic channel allocation for GPS receivers
US6018317A (en) * 1995-06-02 2000-01-25 Trw Inc. Cochannel signal processing system
US6240124B1 (en) * 1995-06-06 2001-05-29 Globalstar L.P. Closed loop power control for low earth orbit satellite communications system
KR100212306B1 (ko) 1995-06-13 1999-08-02 다치카와 게이지 코드 분할 다중 접속(cdma) 복조 장치
US5872776A (en) 1995-11-22 1999-02-16 Yang; Lin-Lang Signal detection and interference cancellation based on simplified matrix inversion for CDMA applications
JP3272940B2 (ja) 1996-03-07 2002-04-08 ケイディーディーアイ株式会社 スペクトル拡散信号復調装置
JP3449457B2 (ja) 1996-04-18 2003-09-22 勝元 崔 無線通信システムで干渉を最小化して雑音の影響を減らすための信号処理装置及び方法
JP2743912B2 (ja) 1996-05-30 1998-04-28 日本電気株式会社 Ｃｄｍａ干渉除去装置
JP2746261B2 (ja) 1996-06-10 1998-05-06 日本電気株式会社 Ｄｓ−ｃｄｍａ干渉キャンセル装置
DE19623667C2 (de) 1996-06-13 2003-02-13 Siemens Ag Verfahren und Einrichtung zur Detektion von nach dem DS-CDMA Prinzip übertragenen Informationen in einer Empfangseinrichtung
AU4328097A (en) * 1996-08-23 1998-03-06 Data Fusion Corporation Rake receiver for spread spectrum signal demodulation
US6430216B1 (en) * 1997-08-22 2002-08-06 Data Fusion Corporation Rake receiver for spread spectrum signal demodulation
JP3311943B2 (ja) 1996-10-18 2002-08-05 松下電器産業株式会社 干渉信号除去装置
US6222828B1 (en) 1996-10-30 2001-04-24 Trw, Inc. Orthogonal code division multiple access waveform format for use in satellite based cellular telecommunications
US5787130A (en) 1996-12-10 1998-07-28 Motorola Inc. Method and apparatus for canceling interference in a spread-spectrum communication system
JP3390900B2 (ja) 1996-12-20 2003-03-31 富士通株式会社 干渉キャンセラ及び仮判定方法
JPH10190495A (ja) 1996-12-20 1998-07-21 Fujitsu Ltd 干渉キャンセラ
JP3326679B2 (ja) 1997-01-31 2002-09-24 沖電気工業株式会社 Ｃｄｍａ受信装置
US5943331A (en) 1997-02-28 1999-08-24 Interdigital Technology Corporation Orthogonal code synchronization system and method for spread spectrum CDMA communications
US6201799B1 (en) 1997-05-01 2001-03-13 Lucent Technologies, Inc Partial decorrelation for a coherent multicode code division multiple access receiver
CA2239681C (en) * 1997-06-10 2007-08-21 Xinping Huang In-phase and quadrature signal regeneration
US5872540A (en) 1997-06-26 1999-02-16 Electro-Radiation Incorporated Digital interference suppression system for radio frequency interference cancellation
US6078611A (en) * 1997-09-16 2000-06-20 Motorola, Inc. Rake receiver and finger management method for spread spectrum communication
US6101385A (en) * 1997-10-09 2000-08-08 Globalstar L.P. Satellite communication service with non-congruent sub-beam coverage
US6175587B1 (en) 1997-12-30 2001-01-16 Motorola, Inc. Communication device and method for interference suppression in a DS-CDMA system
US6131013A (en) 1998-01-30 2000-10-10 Motorola, Inc. Method and apparatus for performing targeted interference suppression
IL123782A (en) * 1998-03-22 2001-05-20 Eci Telecom Ltd Signal Equality
JP2965202B1 (ja) 1998-04-07 1999-10-18 日本電気株式会社 マルチユーザ受信装置及びｃｄｍａ通信システム
US6324159B1 (en) 1998-05-06 2001-11-27 Sirius Communications N.V. Method and apparatus for code division multiple access communication with increased capacity through self-noise reduction
KR100318959B1 (ko) 1998-07-07 2002-04-22 윤종용 부호분할다중접속통신시스템의서로다른부호간의간섭을제거하는장치및방법
US6154443A (en) 1998-08-11 2000-11-28 Industrial Technology Research Institute FFT-based CDMA RAKE receiver system and method
US6304618B1 (en) 1998-08-31 2001-10-16 Ericsson Inc. Methods and systems for reducing co-channel interference using multiple timings for a received signal
US6230180B1 (en) 1998-10-14 2001-05-08 Conexant Systems, Inc. Digital signal processor configuration including multiplying units coupled to plural accumlators for enhanced parallel mac processing
US6215812B1 (en) 1999-01-28 2001-04-10 Bae Systems Canada Inc. Interference canceller for the protection of direct-sequence spread-spectrum communications from high-power narrowband interference
US6115409A (en) 1999-06-21 2000-09-05 Envoy Networks, Inc. Integrated adaptive spatial-temporal system for controlling narrowband and wideband sources of interferences in spread spectrum CDMA receivers
US6157847A (en) 1999-06-29 2000-12-05 Lucent Technologies Inc. Base station system including parallel interference cancellation processor
US6166690A (en) 1999-07-02 2000-12-26 Sensor Systems, Inc. Adaptive nulling methods for GPS reception in multiple-interference environments
US6278726B1 (en) 1999-09-10 2001-08-21 Interdigital Technology Corporation Interference cancellation in a spread spectrum communication system
US6377636B1 (en) 1999-11-02 2002-04-23 Iospan Wirless, Inc. Method and wireless communications system using coordinated transmission and training for interference mitigation
US6282231B1 (en) 1999-12-14 2001-08-28 Sirf Technology, Inc. Strong signal cancellation to enhance processing of weak spread spectrum signal
US6285316B1 (en) 2000-06-02 2001-09-04 Cellguide Ltd. Locating a mobile unit using signals from both mobile beacons and stationary beacons
US20030206577A1 (en) * 2000-03-21 2003-11-06 Liberti Joseph Charles Combined adaptive spatio-temporal processing and multi-user detection for CDMA wireless systems

Also Published As

Publication number Publication date
EP1442551A1 (en) 2004-08-04
US6711219B2 (en) 2004-03-23
JP2005505970A (ja) 2005-02-24
CN1593030A (zh) 2005-03-09
EP1442551B1 (en) 2018-05-02
US20040017867A1 (en) 2004-01-29
EP1442551A4 (en) 2006-04-05
CN100336335C (zh) 2007-09-05
KR20040066098A (ko) 2004-07-23
WO2003030440A1 (en) 2003-04-10

Similar Documents

Publication Publication Date Title
JP4173100B2 (ja) 信号干渉除去
US5218619A (en) CDMA subtractive demodulation
US7359465B2 (en) Serial cancellation receiver design for a coded signal processing engine
US7200183B2 (en) Construction of an interference matrix for a coded signal processing engine
US5577025A (en) Signal acquisition in a multi-user communication system using multiple walsh channels
US7061970B2 (en) Self-synchronizing adaptive multistage receiver for wireless communication systems
US11460541B2 (en) Method and system for detection of a target by a passive radar system exploiting multichannel-per-carrier illuminator sources
HK1009366B (en) Cdma subtractive demodulation
HK1009366A1 (en) Cdma subtractive demodulation
KR20010034086A (ko) 직접 시퀀스 확산 스펙트럼 통신 시스템에서의 다경로지연 추정을 위한 방법 및 장치
US6947474B2 (en) Rake receiver for spread spectrum signal demodulation
EP0988706B1 (en) Reception method and receiver
EP1087539B1 (en) Demodulating receiver with simple structure
WO1998008319A1 (en) Rake receiver for spread spectrum signal demodulation
Katz Code acquisition in advanced CDMA networks
Borna et al. Improving Long PN-Code Acquisition in the Presence of Doppler Frequency Shifts
Sousa Packet error probability calculation in a direct sequence spread spectrum network
Hu Space-time adaptive acquisition and demodulation in mobile cellular
ery Jr Parameter Estimation in DS-CDMA Systems
Acharya et al. Issues and Performance Study of Jammer Suppression in Direct Sequence Spread Spectrum Communications using Fast ICA
HK1009365B (en) Cdma substractive demodulator

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20050825

A521 Request for written amendment filed

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20060418

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20080318

A524 Written submission of copy of amendment under article 19 pct

Free format text: JAPANESE INTERMEDIATE CODE: A524

Effective date: 20080616

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20080715

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20080812

R150 Certificate of patent or registration of utility model

Ref document number: 4173100

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110822

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110822

Year of fee payment: 3

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313113

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110822

Year of fee payment: 3

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20110822

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120822

Year of fee payment: 4

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20120822

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20130822

Year of fee payment: 5

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

S111 Request for change of ownership or part of ownership

Free format text: JAPANESE INTERMEDIATE CODE: R313113

S531 Written request for registration of change of domicile

Free format text: JAPANESE INTERMEDIATE CODE: R313531

R350 Written notification of registration of transfer

Free format text: JAPANESE INTERMEDIATE CODE: R350

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

EXPY Cancellation because of completion of term