TW200419953A - Application of spreading codes to signals - Google Patents

Application of spreading codes to signals

Info

Publication number
TW200419953A
TW200419953A TW093105033A TW93105033A TW200419953A TW 200419953 A TW200419953 A TW 200419953A TW 093105033 A TW093105033 A TW 093105033A TW 93105033 A TW93105033 A TW 93105033A TW 200419953 A TW200419953 A TW 200419953A
Authority
TW
Taiwan
Prior art keywords
values
value
product
produce
output signal
Prior art date
Application number
TW093105033A
Other languages
English (en)
Other versions
TWI241080B (en
Inventor
Daniel Edward Alt
Original Assignee
Ttp Communications Ltd
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
Priority claimed from GB0304680A external-priority patent/GB0304680D0/en
Application filed by Ttp Communications Ltd filed Critical Ttp Communications Ltd
Publication of TW200419953A publication Critical patent/TW200419953A/zh
Application granted granted Critical
Publication of TWI241080B publication Critical patent/TWI241080B/zh

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/10—Code generation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • H04J13/0003—Code application, i.e. aspects relating to how codes are applied to form multiplexed channels
    • 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
    • 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
    • H04B2201/70707—Efficiency-related aspects

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Error Detection And Correction (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
TW093105033A 2003-02-28 2004-02-27 Application of spreading codes to signals TWI241080B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0304680A GB0304680D0 (en) 2003-02-28 2003-02-28 Application of spreading codes to signals
GB0325730A GB0325730D0 (en) 2003-02-28 2003-11-04 Application of spreading codes to signals

Publications (2)

Publication Number Publication Date
TW200419953A true TW200419953A (en) 2004-10-01
TWI241080B TWI241080B (en) 2005-10-01

Family

ID=32929394

Family Applications (1)

Application Number Title Priority Date Filing Date
TW093105033A TWI241080B (en) 2003-02-28 2004-02-27 Application of spreading codes to signals

Country Status (9)

Country Link
US (1) US7519104B2 (zh)
EP (1) EP1597836B1 (zh)
JP (1) JP2006519536A (zh)
KR (1) KR100887691B1 (zh)
CN (1) CN1754324B (zh)
AT (1) ATE433621T1 (zh)
DE (1) DE602004021474D1 (zh)
TW (1) TWI241080B (zh)
WO (1) WO2004077693A1 (zh)

Families Citing this family (35)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1779543B1 (en) 2004-07-30 2012-04-25 Andrew Richardson Signal transmission method from a local network node
US9876670B2 (en) 2004-07-30 2018-01-23 Commscope Technologies Llc Local network node
WO2006010958A2 (en) 2004-07-30 2006-02-02 Andrew Richardson Power control in a local network node (lnn)
US8947465B2 (en) 2004-12-02 2015-02-03 Sharp Laboratories Of America, Inc. Methods and systems for display-mode-dependent brightness preservation
US8913089B2 (en) 2005-06-15 2014-12-16 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with frequency-specific gain
US7800577B2 (en) 2004-12-02 2010-09-21 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics
US8120570B2 (en) 2004-12-02 2012-02-21 Sharp Laboratories Of America, Inc. Systems and methods for tone curve generation, selection and application
US7961199B2 (en) 2004-12-02 2011-06-14 Sharp Laboratories Of America, Inc. Methods and systems for image-specific tone scale adjustment and light-source control
US8922594B2 (en) 2005-06-15 2014-12-30 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with high frequency contrast enhancement
US7515160B2 (en) * 2006-07-28 2009-04-07 Sharp Laboratories Of America, Inc. Systems and methods for color preservation with image tone scale corrections
US7924261B2 (en) 2004-12-02 2011-04-12 Sharp Laboratories Of America, Inc. Methods and systems for determining a display light source adjustment
US9083969B2 (en) 2005-08-12 2015-07-14 Sharp Laboratories Of America, Inc. Methods and systems for independent view adjustment in multiple-view displays
US7782405B2 (en) 2004-12-02 2010-08-24 Sharp Laboratories Of America, Inc. Systems and methods for selecting a display source light illumination level
US8004511B2 (en) 2004-12-02 2011-08-23 Sharp Laboratories Of America, Inc. Systems and methods for distortion-related source light management
US8111265B2 (en) 2004-12-02 2012-02-07 Sharp Laboratories Of America, Inc. Systems and methods for brightness preservation using a smoothed gain image
US7982707B2 (en) 2004-12-02 2011-07-19 Sharp Laboratories Of America, Inc. Methods and systems for generating and applying image tone scale adjustments
US7768496B2 (en) 2004-12-02 2010-08-03 Sharp Laboratories Of America, Inc. Methods and systems for image tonescale adjustment to compensate for a reduced source light power level
ES2465645T3 (es) * 2005-01-31 2014-06-06 St-Ericsson Sa Procedimiento y aparato para desensanchar datos en un sistema de comunicación inalámbrico
CN101142755B (zh) * 2005-01-31 2015-08-26 Nxp股份有限公司 在无线通信系统中对数据进行解扩的方法和设备
US7839406B2 (en) 2006-03-08 2010-11-23 Sharp Laboratories Of America, Inc. Methods and systems for enhancing display characteristics with ambient illumination input
US7826681B2 (en) 2007-02-28 2010-11-02 Sharp Laboratories Of America, Inc. Methods and systems for surround-specific display modeling
US8155434B2 (en) 2007-10-30 2012-04-10 Sharp Laboratories Of America, Inc. Methods and systems for image enhancement
US8345038B2 (en) 2007-10-30 2013-01-01 Sharp Laboratories Of America, Inc. Methods and systems for backlight modulation and brightness preservation
US9177509B2 (en) 2007-11-30 2015-11-03 Sharp Laboratories Of America, Inc. Methods and systems for backlight modulation with scene-cut detection
US8378956B2 (en) 2007-11-30 2013-02-19 Sharp Laboratories Of America, Inc. Methods and systems for weighted-error-vector-based source light selection
US8223113B2 (en) 2007-12-26 2012-07-17 Sharp Laboratories Of America, Inc. Methods and systems for display source light management with variable delay
US8207932B2 (en) * 2007-12-26 2012-06-26 Sharp Laboratories Of America, Inc. Methods and systems for display source light illumination level selection
US8179363B2 (en) 2007-12-26 2012-05-15 Sharp Laboratories Of America, Inc. Methods and systems for display source light management with histogram manipulation
US8169431B2 (en) * 2007-12-26 2012-05-01 Sharp Laboratories Of America, Inc. Methods and systems for image tonescale design
US8203579B2 (en) 2007-12-26 2012-06-19 Sharp Laboratories Of America, Inc. Methods and systems for backlight modulation with image characteristic mapping
US8531379B2 (en) 2008-04-28 2013-09-10 Sharp Laboratories Of America, Inc. Methods and systems for image compensation for ambient conditions
US8416179B2 (en) 2008-07-10 2013-04-09 Sharp Laboratories Of America, Inc. Methods and systems for color preservation with a color-modulated backlight
US9330630B2 (en) 2008-08-30 2016-05-03 Sharp Laboratories Of America, Inc. Methods and systems for display source light management with rate change control
US8165724B2 (en) 2009-06-17 2012-04-24 Sharp Laboratories Of America, Inc. Methods and systems for power-controlling display devices
CN105515713B (zh) * 2014-09-25 2018-11-30 中兴通讯股份有限公司 一种多用户码分多址接入通信方法与相应发射机、接收机

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2605615B2 (ja) * 1993-12-30 1997-04-30 日本電気株式会社 スペクトラム拡散受信機
JP3796870B2 (ja) 1997-01-21 2006-07-12 ソニー株式会社 受信装置及び受信方法、並びに携帯電話システムの端末装置
KR100260445B1 (ko) 1998-04-04 2000-07-01 윤종용 대역확산 통신시스템의 직접 확산신호 생성장치
GB2358564A (en) 1998-04-04 2001-07-25 Samsung Electronics Co Ltd Multi-stage spread spectrum signal generating device
US6490267B1 (en) * 1998-09-29 2002-12-03 Samsung Electronics, Co., Ltd. Device and method for generating spreading code and spreading channel signals using spreading code in a CDMA communication system
JP3116923B2 (ja) * 1998-11-25 2000-12-11 日本電気株式会社 周波数拡散変調回路
US6934319B2 (en) * 1999-12-30 2005-08-23 Infineon Technologies Ag Configurable multimode despreader for spread spectrum applications
JP2001223670A (ja) 2000-02-09 2001-08-17 Nec Corp 拡散符号生成器及びそれを用いるｃｄｍａ通信装置並びにそれらに用いる拡散符号生成方法
US7174356B2 (en) * 2003-06-24 2007-02-06 Motorola, Inc. Complex multiplication method and apparatus with phase rotation

Also Published As

Publication number Publication date
KR20050107442A (ko) 2005-11-11
EP1597836B1 (en) 2009-06-10
CN1754324A (zh) 2006-03-29
JP2006519536A (ja) 2006-08-24
US7519104B2 (en) 2009-04-14
US20060256840A1 (en) 2006-11-16
ATE433621T1 (de) 2009-06-15
TWI241080B (en) 2005-10-01
EP1597836A1 (en) 2005-11-23
DE602004021474D1 (de) 2009-07-23
WO2004077693A1 (en) 2004-09-10
CN1754324B (zh) 2012-04-25
KR100887691B1 (ko) 2009-03-11

Similar Documents

Publication Publication Date Title
TW200419953A (en) Application of spreading codes to signals
AU752300B2 (en) Apparatus and method for generating scrambling code in UMTS mobile communication system
DE60125190T2 (de) Verfahren, überträger und empfänger für digitale spreizspektrumkommunikation durch modulation mit golay-komplementärsequenzen
WO2002073937A3 (en) Wireless communications methods and systems for long-code and other spread spectrum waveform processing
NO20021307D0 (no) Flerbrukerdetektor for variable spredningsfaktorer
WO2005073825A3 (en) Protection against power analysis attacks
WO2006103601A3 (en) Canonical signed digit multiplier
AU2002343144A1 (en) High-speed computation in arithmetic logic circuit
AU7056500A (en) Apparatus and methods for receiving information using variable length accumulation searchers
CN101553995B (zh) 联合检测器的定点实现
CN103560803A (zh) 基于ovsf码的跳码直扩通信方法及系统
DE60327939D1 (de) MMSE Mehrbenutzer-Detektion mit reduzierter Komplexität für Multirate CDMA Übertragung
KR100580843B1 (ko) Ｖ―ｂｌａｓｔ에서 채널전달함수행렬 처리장치 및 그의처리방법
WO2007029166A3 (en) Full-adder modules and multiplier devices using the same
Chang et al. Study of a diversity O-CDMA scheme for optical wireless
DE60230459D1 (de) Mehrkanalige gemeinsame Dekodierung in dem mobilen Handgerät
Martoyo et al. Chaos codes vs. orthogonal codes for CDMA
Kavitha et al. Implementation of CDMA in GNU Radio
ATE318030T1 (de) Übertragungsverfahren mit verringerter interferenz in ein sttd-schema
TW200625165A (en) Mapping method utilizing look-up table and related apparatus
AUPS205302A0 (en) Filter structure for iterative signal processing
Tan et al. Low complexity spread spectrum correlator
KR100204563B1 (ko) 기저 대역 멀티 채널 유한 임펄스 응답 필터
US20020150149A1 (en) Code detection circuit and code detection method
AU4934699A (en) Quasi-orthogonal code mask generating device in mobile communication system

Legal Events

Date Code Title Description
MM4A Annulment or lapse of patent due to non-payment of fees