SG129446A1 - A system & method for the mitigation of CDMA crosscorrelation artifacts and the improvement of signal-to-noise ratios in TDMA location networks - Google Patents

A system & method for the mitigation of CDMA crosscorrelation artifacts and the improvement of signal-to-noise ratios in TDMA location networks

Info

Publication number
SG129446A1
SG129446A1 SG200700554A SG200700554A SG129446A1 SG 129446 A1 SG129446 A1 SG 129446A1 SG 200700554 A SG200700554 A SG 200700554A SG 200700554 A SG200700554 A SG 200700554A SG 129446 A1 SG129446 A1 SG 129446A1
Authority
SG
Singapore
Prior art keywords
multiple access
division multiple
cdma
tdma
artifacts
Prior art date
Application number
SG200700554A
Other languages
English (en)
Inventor
James Lamance
David Small
Original Assignee
Locata 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 Locata Corp filed Critical Locata Corp
Publication of SG129446A1 publication Critical patent/SG129446A1/en

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S1/00—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith
    • G01S1/02—Beacons or beacon systems transmitting signals having a characteristic or characteristics capable of being detected by non-directional receivers and defining directions, positions, or position lines fixed relatively to the beacon transmitters; Receivers co-operating therewith using radio waves
    • G01S1/08—Systems for determining direction or position line
    • G01S1/20—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems
    • G01S1/24—Systems for determining direction or position line using a comparison of transit time of synchronised signals transmitted from non-directional antennas or antenna systems spaced apart, i.e. path-difference systems the synchronised signals being pulses or equivalent modulations on carrier waves and the transit times being compared by measuring the difference in arrival time of a significant part of the modulations, e.g. LORAN systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J13/00—Code division multiplex systems
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S5/00—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations
    • G01S5/02—Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations using radio waves
    • G01S5/14—Determining absolute distances from a plurality of spaced points of known location
    • 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)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Position Fixing By Use Of Radio Waves (AREA)
  • Synchronisation In Digital Transmission Systems (AREA)
  • Time-Division Multiplex Systems (AREA)
  • Mobile Radio Communication Systems (AREA)
SG200700554A 2003-08-04 2004-08-03 A system & method for the mitigation of CDMA crosscorrelation artifacts and the improvement of signal-to-noise ratios in TDMA location networks SG129446A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
AU2003904045A AU2003904045A0 (en) 2003-08-04 2003-08-04 A method and device for the mitigation of cdma cross-correlation artifacts and the improvement of signal-to-noise ratios in tdma positioning signals

Publications (1)

Publication Number Publication Date
SG129446A1 true SG129446A1 (en) 2007-02-26

Family

ID=32476336

Family Applications (1)

Application Number Title Priority Date Filing Date
SG200700554A SG129446A1 (en) 2003-08-04 2004-08-03 A system & method for the mitigation of CDMA crosscorrelation artifacts and the improvement of signal-to-noise ratios in TDMA location networks

Country Status (9)

Country Link
US (1) US7463617B2 (ko)
EP (1) EP1661426B1 (ko)
JP (1) JP5060126B2 (ko)
KR (1) KR101161454B1 (ko)
CN (1) CN100586215C (ko)
AU (1) AU2003904045A0 (ko)
IL (1) IL173228A (ko)
SG (1) SG129446A1 (ko)
WO (1) WO2005013633A1 (ko)

Families Citing this family (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060248197A1 (en) * 2005-04-27 2006-11-02 Evans Scott C Adaptive connectionless scheduling protocol
US7920544B2 (en) * 2005-03-28 2011-04-05 Qualcomm Incorporated Method and apparatus for enhancing signal-to-noise ratio of position location measurements
US9097783B2 (en) 2006-04-28 2015-08-04 Telecommunication Systems, Inc. System and method for positioning using hybrid spectral compression and cross correlation signal processing
US7511662B2 (en) * 2006-04-28 2009-03-31 Loctronix Corporation System and method for positioning in configured environments
ATE511663T1 (de) * 2007-10-16 2011-06-15 Qualcomm Inc Multiphasencodegenerator und gnss-empfänger
US8340217B1 (en) * 2007-10-23 2012-12-25 Qualcomm Incorporated Configurable search engine start/stop mechanism provides flexible ranges of search for GPS C/A code
US9035829B2 (en) * 2008-09-10 2015-05-19 Nextnav, Llc Wide area positioning systems and methods
JP5478358B2 (ja) * 2010-05-17 2014-04-23 Ｋｄｄｉ株式会社 位置及び／又は時刻情報配信装置
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.
JP5102383B2 (ja) * 2010-07-26 2012-12-19 エルジー エレクトロニクス インコーポレイティド デュアルモード端末におけるｓｍｓ受信方法及びそのためのデュアルモード端末
CN101977172B (zh) * 2010-10-18 2013-02-06 北京邮电大学 广播定位信号生成方法、定位方法及装置
CN102938655B (zh) * 2012-10-18 2014-12-31 北京邮电大学 一种互相关干扰减轻方法及系统
US11102746B2 (en) 2014-03-03 2021-08-24 Rosemount Inc. Positioning system
US10942250B2 (en) 2014-03-03 2021-03-09 Rosemount Inc. Positioning system
EP3198745A4 (en) * 2014-09-25 2018-05-16 Telefonaktiebolaget LM Ericsson (PUBL) Method and network node for facilitating timing synchronization in network
US10735123B2 (en) * 2018-08-07 2020-08-04 Honeywell International Inc. Universal pseudorandom noise code generator
CN114785378B (zh) * 2022-03-09 2023-06-20 北京遥感设备研究所 一种远距离交会对接微波雷达快速同步的系统与方法
CN114900881A (zh) * 2022-04-20 2022-08-12 湖南艾科诺维科技有限公司 基于tdma信号的帧同步方法及系统

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5680414A (en) * 1994-09-09 1997-10-21 Omnipoint Corporation Synchronization apparatus and method for spread spectrum receiver
US6041046A (en) * 1995-07-14 2000-03-21 Omnipoint Corporation Cyclic time hopping in time division multiple access communication system
JP3376224B2 (ja) * 1996-10-23 2003-02-10 株式会社エヌ・ティ・ティ・ドコモ Ｄｓ−ｃｄｍａ基地局間非同期セルラ方式における初期同期方法および受信機
US6163696A (en) * 1996-12-31 2000-12-19 Lucent Technologies Inc. Mobile location estimation in a wireless communication system
JPH10294716A (ja) 1997-04-21 1998-11-04 Kokusai Electric Co Ltd マルチコード伝送方法及び送信機及び受信機及びマルチコード伝送システム
US6101178A (en) * 1997-07-10 2000-08-08 Ksi Inc. Pseudolite-augmented GPS for locating wireless telephones
EP0942615A4 (en) * 1997-08-08 2006-03-22 Mitsubishi Electric Corp MOBILE COMMUNICATION SYSTEM
GB9717844D0 (en) * 1997-08-23 1997-10-29 The Technology Partnership Plc Improvements in,or relating to,digital cellular radio communication networks
JP3017983B2 (ja) * 1997-11-19 2000-03-13 株式会社ケンウッド 同期捕捉回路
JP3097074B2 (ja) * 1997-12-09 2000-10-10 日本電気株式会社 受信同期回路と受信同期方法及びこれを用いた受信機とデジタル通信システム
CN1152262C (zh) * 1997-12-23 2004-06-02 Ksi公司 定位移动无线通信收发机的系统及其方法
US6370160B1 (en) * 1998-12-29 2002-04-09 Thomson Licensing S. A. Base to handset epoch synchronization in multi-line wireless telephone
US6546026B1 (en) * 1999-06-17 2003-04-08 Lucent Technologies Inc. Multi-diversity synchronization technique for improving synchronization performance in wireless applications over fading channels
US6847619B2 (en) * 2001-05-11 2005-01-25 Northrop Grumman Corporation Dual mode of operation multiple access system for data link communication
US7729412B2 (en) * 2001-10-29 2010-06-01 Qualcomm Incorporated Parameter estimator with dynamically variable integration time

Also Published As

Publication number Publication date
KR20060058702A (ko) 2006-05-30
IL173228A (en) 2010-11-30
IL173228A0 (en) 2006-06-11
US7463617B2 (en) 2008-12-09
AU2003904045A0 (en) 2003-08-14
KR101161454B1 (ko) 2012-07-02
CN100586215C (zh) 2010-01-27
EP1661426B1 (en) 2018-10-10
EP1661426A1 (en) 2006-05-31
JP5060126B2 (ja) 2012-10-31
WO2005013633A1 (en) 2005-02-10
US20070058591A1 (en) 2007-03-15
EP1661426A4 (en) 2011-05-25
JP2007501383A (ja) 2007-01-25
CN1839654A (zh) 2006-09-27

Similar Documents

Publication Publication Date Title
SG129446A1 (en) A system & method for the mitigation of CDMA crosscorrelation artifacts and the improvement of signal-to-noise ratios in TDMA location networks
CA2506700C (en) Satellite-based positioning system improvement
ES2359615T3 (es) Procedimiento y aparato para adquirir señales del sistema de posicionamiento de satélites.
Tiemann et al. Multi-user interference and wireless clock synchronization in TDOA-based UWB localization
KR101010275B1 (ko) 무선 통신 기지국들을 위한 지피에스 동기화
KR100676780B1 (ko) 약한 확산 스팩트럼 신호의 처리를 개선하기 위한 강한 신호의 소거
US6285316B1 (en) Locating a mobile unit using signals from both mobile beacons and stationary beacons
JP5646486B2 (ja) 時間基準システム
CN103323864B (zh) 来自卫星系统的精确的绝对时间传递
WO2005022189A3 (fr) Determination de positions de terminaux mobiles a l'aide de donnees d'assistance transmises sur requete
DE60041128D1 (de) Nheitlichen und getrennten abtastsegmenten
CA2343059A1 (en) Method and apparatus for increasing the sensitivity of a global positioning satellite receiver
IL151524A (en) Providing time synchronization to a gps locator
US20150063426A1 (en) Systems and methods for pseudo-random coding
US10838072B2 (en) Fast fix using a perfect reference in a satellite-based positioning system
US7876738B2 (en) Preventing an incorrect synchronization between a received code-modulated signal and a replica code
DE60108221D1 (de) Verfahren zur Verringerung der Mehrwegstörungen in einem Navigationsempfänger
WO2009025501A9 (en) Positioning method using digital audio broadcasting and transmitter for the same
US9178561B2 (en) Method and apparatus for correlating signals received from a navigation satellite system
AU2003200955B2 (en) Passive position determination using two low-earth orbit satellites
Im et al. An indoor positioning system using time-delayed GPS repeater
KR20060107848A (ko) Ｇｐｓ 장치
Zhao et al. A parallel differential correlation acquisition algorithm in time domain