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 (zh)
EP (1) EP1661426B1 (zh)
JP (1) JP5060126B2 (zh)
KR (1) KR101161454B1 (zh)
CN (1) CN100586215C (zh)
AU (1) AU2003904045A0 (zh)
IL (1) IL173228A (zh)
SG (1) SG129446A1 (zh)
WO (1) WO2005013633A1 (zh)

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US7920544B2 (en) 2005-03-28 2011-04-05 Qualcomm Incorporated Method and apparatus for enhancing signal-to-noise ratio of position location measurements
US7511662B2 (en) * 2006-04-28 2009-03-31 Loctronix Corporation System and method for positioning in configured environments
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
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
US10942250B2 (en) 2014-03-03 2021-03-09 Rosemount Inc. Positioning system
US11102746B2 (en) 2014-03-03 2021-08-24 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
CN111279725A (zh) 2018-09-17 2020-06-12 罗斯蒙特公司 位置感知系统
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

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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
JP3308550B2 (ja) * 1997-08-08 2002-07-29 三菱電機株式会社 移動通信システム
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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
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Also Published As

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

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