DE69624812T2 - Verringerung des mehrwegeffekts in gps-empfängern - Google Patents
Verringerung des mehrwegeffekts in gps-empfängernInfo
- Publication number
- DE69624812T2 DE69624812T2 DE69624812T DE69624812T DE69624812T2 DE 69624812 T2 DE69624812 T2 DE 69624812T2 DE 69624812 T DE69624812 T DE 69624812T DE 69624812 T DE69624812 T DE 69624812T DE 69624812 T2 DE69624812 T2 DE 69624812T2
- Authority
- DE
- Germany
- Prior art keywords
- reducing
- gps receivers
- way effect
- way
- effect
- 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
Links
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
- H04B1/7073—Synchronisation aspects
- H04B1/7085—Synchronisation aspects using a code tracking loop, e.g. a delay-locked loop
-
- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/22—Multipath-related issues
-
- 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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
- G01S19/30—Acquisition or tracking or demodulation of signals transmitted by the system code related
-
- 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
- H04B1/709—Correlator structure
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
- Mobile Radio Communication Systems (AREA)
- Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/449,215 US6023489A (en) | 1995-05-24 | 1995-05-24 | Method and apparatus for code synchronization in a global positioning system receiver |
PCT/US1996/007774 WO1996037789A1 (en) | 1995-05-24 | 1996-05-24 | Mitigation of multipath effects in global positioning system receivers |
Publications (2)
Publication Number | Publication Date |
---|---|
DE69624812D1 DE69624812D1 (de) | 2002-12-19 |
DE69624812T2 true DE69624812T2 (de) | 2003-06-18 |
Family
ID=23783346
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE69624812T Expired - Lifetime DE69624812T2 (de) | 1995-05-24 | 1996-05-24 | Verringerung des mehrwegeffekts in gps-empfängern |
Country Status (6)
Country | Link |
---|---|
US (2) | US6023489A (de) |
EP (1) | EP0830616B1 (de) |
AU (1) | AU724006B2 (de) |
CA (1) | CA2221969C (de) |
DE (1) | DE69624812T2 (de) |
WO (1) | WO1996037789A1 (de) |
Families Citing this family (49)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AU714888B2 (en) * | 1995-08-09 | 2000-01-13 | Magellan Corporation | Multipath error reduction in a spread spectrum receiver for ranging applications |
US5953367A (en) * | 1995-08-09 | 1999-09-14 | Magellan Corporation | Spread spectrum receiver using a pseudo-random noise code for ranging applications in a way that reduces errors when a multipath signal is present |
US6330273B1 (en) * | 1996-03-28 | 2001-12-11 | Roke Manor Research Limited | Apparatus for code tracking in a direct sequence spread spectrum receiver |
US5808582A (en) | 1996-09-13 | 1998-09-15 | Litton Consulting Group, Inc. | Global positioning system receiver with improved multipath signal rejection |
US5946244A (en) | 1997-03-05 | 1999-08-31 | Micron Technology, Inc. | Delay-locked loop with binary-coupled capacitor |
US6173432B1 (en) * | 1997-06-20 | 2001-01-09 | Micron Technology, Inc. | Method and apparatus for generating a sequence of clock signals |
US6243409B1 (en) * | 1997-07-15 | 2001-06-05 | Novatel, Inc. | Global navigation satellite system receiver with blanked-PRN code correlation |
US6118977A (en) * | 1997-09-11 | 2000-09-12 | Lucent Technologies, Inc. | Telecommunications-assisted satellite positioning system |
US6549559B2 (en) * | 1997-12-23 | 2003-04-15 | Koninklijke Philips Electronics N.V. | Apparatus and method for locking onto a psuedo-noise code in an IS-95 spread spectrum communications system |
US6493378B1 (en) | 1998-01-06 | 2002-12-10 | Topcon Gps Llc | Methods and apparatuses for reducing multipath errors in the demodulation of pseudo-random coded signals |
US6269451B1 (en) | 1998-02-27 | 2001-07-31 | Micron Technology, Inc. | Method and apparatus for adjusting data timing by delaying clock signal |
US6366599B1 (en) * | 1998-03-16 | 2002-04-02 | Trimble Navigation Limited | Fast acquisition of spread-spectrum signals by dynamically varying spacing of search bins |
US6298083B1 (en) * | 1998-03-16 | 2001-10-02 | Trimble Navigation Limited | Power savings technique for a positioning system receiver |
US6349399B1 (en) * | 1998-09-03 | 2002-02-19 | Micron Technology, Inc. | Method and apparatus for generating expect data from a captured bit pattern, and memory device using same |
JP3251242B2 (ja) * | 1998-09-16 | 2002-01-28 | 沖電気工業株式会社 | 拡散符号同期回路及び拡散符号同期方法 |
US6374360B1 (en) | 1998-12-11 | 2002-04-16 | Micron Technology, Inc. | Method and apparatus for bit-to-bit timing correction of a high speed memory bus |
US6470060B1 (en) * | 1999-03-01 | 2002-10-22 | Micron Technology, Inc. | Method and apparatus for generating a phase dependent control signal |
US6603803B1 (en) | 1999-03-12 | 2003-08-05 | Navcom Technology, Inc. | Global positioning system receiver for monitoring the satellite transmissions and for reducing the effects of multipath error on coded signals and carrier phase measurements |
US6347113B1 (en) | 1999-03-12 | 2002-02-12 | Navcom Technology, Inc. | Global positioning system receiver for monitoring the satellite transmissions and for reducing the effects of multipath error |
US6704348B2 (en) * | 2001-05-18 | 2004-03-09 | Global Locate, Inc. | Method and apparatus for computing signal correlation at multiple resolutions |
GB2351864B (en) * | 1999-07-05 | 2004-05-26 | Symmetricom Inc | A receiver for receiving rf pseudo-random encoded signals |
US6493406B1 (en) * | 1999-07-22 | 2002-12-10 | Motorola Inc | Method and apparatus for symbol independent discriminator correlator automatic frequency control |
US7103095B2 (en) * | 2000-03-06 | 2006-09-05 | Texas Instruments Incorporated | Spread spectrum code correlator |
JP4590113B2 (ja) * | 2000-03-14 | 2010-12-01 | キヤノン株式会社 | スペクトラム拡散通信システムのための受信装置 |
GB0011493D0 (en) * | 2000-05-13 | 2000-06-28 | Koninkl Philips Electronics Nv | Method and apparatus for code phase tracking |
EP1322973B1 (de) * | 2000-09-23 | 2009-05-27 | Nxp B.V. | Verfahren zur erzeugung eines zeitverschobenen signals |
US6715094B2 (en) * | 2000-12-20 | 2004-03-30 | Intel Corporation | Mult-mode I/O interface for synchronizing selected control patterns into control clock domain to obtain interface control signals to be transmitted to I/O buffers |
US7006556B2 (en) | 2001-05-18 | 2006-02-28 | Global Locate, Inc. | Method and apparatus for performing signal correlation at multiple resolutions to mitigate multipath interference |
US7190712B2 (en) | 2001-05-18 | 2007-03-13 | Global Locate, Inc | Method and apparatus for performing signal correlation |
US7567636B2 (en) | 2001-05-18 | 2009-07-28 | Global Locate, Inc. | Method and apparatus for performing signal correlation using historical correlation data |
US7995682B2 (en) | 2001-05-18 | 2011-08-09 | Broadcom Corporation | Method and apparatus for performing signal processing using historical correlation data |
US7769076B2 (en) | 2001-05-18 | 2010-08-03 | Broadcom Corporation | Method and apparatus for performing frequency synchronization |
US6801989B2 (en) | 2001-06-28 | 2004-10-05 | Micron Technology, Inc. | Method and system for adjusting the timing offset between a clock signal and respective digital signals transmitted along with that clock signal, and memory device and computer system using same |
EP1342936B1 (de) | 2002-03-07 | 2005-07-20 | Morse Tec Europe S.r.l. | Hydraulischer Spanner mit Hohlkolben und schraubartiger Festhalter |
US7372892B2 (en) * | 2002-04-29 | 2008-05-13 | Interdigital Technology Corporation | Simple and robust digital code tracking loop for wireless communication systems |
DE60221846T2 (de) | 2002-10-09 | 2008-05-08 | Morse Tec Europe S.R.L. | Externer Schnappverschluss für eine kassettenartige, hydraulische Spannvorrichtung |
GB2400282B8 (en) * | 2003-03-31 | 2014-08-27 | St Microelectronics Res & Dev | Integrated circuit for code acquisition |
US7194279B2 (en) * | 2003-05-23 | 2007-03-20 | Nokia Corporation | Adjustment of a phase difference between two signals |
US7168027B2 (en) | 2003-06-12 | 2007-01-23 | Micron Technology, Inc. | Dynamic synchronization of data capture on an optical or other high speed communications link |
US7424501B2 (en) * | 2003-06-30 | 2008-09-09 | Intel Corporation | Nonlinear filtering and deblocking applications utilizing SIMD sign and absolute value operations |
US7539714B2 (en) * | 2003-06-30 | 2009-05-26 | Intel Corporation | Method, apparatus, and instruction for performing a sign operation that multiplies |
US7234070B2 (en) * | 2003-10-27 | 2007-06-19 | Micron Technology, Inc. | System and method for using a learning sequence to establish communications on a high-speed nonsynchronous interface in the absence of clock forwarding |
US7453925B2 (en) * | 2004-10-18 | 2008-11-18 | Navcom Technology, Inc. | Phase multi-path mitigation |
US8170085B2 (en) * | 2006-03-09 | 2012-05-01 | CSR Technology Holdings Inc. | Multipath error estimation in satellite navigation receivers |
US7903028B2 (en) * | 2006-12-18 | 2011-03-08 | Sirf Technology Holdings, Inc. | Ephemeris download from weak signals |
JP5678609B2 (ja) * | 2010-11-26 | 2015-03-04 | セイコーエプソン株式会社 | 誤相関判定方法及び誤相関判定装置 |
US8976844B2 (en) * | 2012-02-14 | 2015-03-10 | The Boeing Company | Receiver for detection and time recovery of non-coherent signals and methods of operating same |
US10241212B2 (en) | 2016-02-19 | 2019-03-26 | Topcon Positioning Systems, Inc. | Methods and receivers for processing GNSS signals |
US11184203B2 (en) | 2019-12-12 | 2021-11-23 | Maxim Integrated Products, Inc. | Systems and methods for identifying polarization/quadrature channels in dual-polarization coherent optical transmission |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4649549A (en) * | 1983-08-30 | 1987-03-10 | Sophisticated Signals And Circuits | Apparatus for synchronizing linear PN sequences |
WO1987001540A1 (en) * | 1985-09-03 | 1987-03-12 | Motorola, Inc. | Apparatus for and method of doppler searching in a digital gps receiver |
US4894842A (en) * | 1987-10-15 | 1990-01-16 | The Charles Stark Draper Laboratory, Inc. | Precorrelation digital spread spectrum receiver |
US4972431A (en) * | 1989-09-25 | 1990-11-20 | Magnavox Government And Industrial Electronics Company | P-code-aided global positioning system receiver |
US5101416A (en) * | 1990-11-28 | 1992-03-31 | Novatel Comunications Ltd. | Multi-channel digital receiver for global positioning system |
DK0552975T3 (da) * | 1992-01-24 | 2000-03-27 | Novatel Inc | Modtager af pseudotilfældig støj, hvilken modtager kompenserer for flervejsforvrængning ved dynamisk justering af tidsforsi |
US5414729A (en) * | 1992-01-24 | 1995-05-09 | Novatel Communications Ltd. | Pseudorandom noise ranging receiver which compensates for multipath distortion by making use of multiple correlator time delay spacing |
US5347536A (en) * | 1993-03-17 | 1994-09-13 | The United States Of America As Represented By The Administrator Of The National Aeronautics And Space Administration | Multipath noise reduction for spread spectrum signals |
KR970005598B1 (ko) * | 1994-06-29 | 1997-04-18 | 삼성전자 주식회사 | 대역확산통신방식의 비동기 디지탈 수신장치 |
US5579345A (en) * | 1994-10-13 | 1996-11-26 | Westinghouse Electric Corporation | Carrier tracking loop for QPSK demodulator |
US5600670A (en) * | 1994-12-21 | 1997-02-04 | Trimble Navigation, Ltd. | Dynamic channel allocation for GPS receivers |
US5963582A (en) * | 1996-05-24 | 1999-10-05 | Leica Geosystems Inc. | Mitigation of multipath effects in global positioning system receivers |
-
1995
- 1995-05-24 US US08/449,215 patent/US6023489A/en not_active Expired - Lifetime
-
1996
- 1996-05-24 AU AU62496/96A patent/AU724006B2/en not_active Expired
- 1996-05-24 EP EP96921225A patent/EP0830616B1/de not_active Expired - Lifetime
- 1996-05-24 DE DE69624812T patent/DE69624812T2/de not_active Expired - Lifetime
- 1996-05-24 CA CA002221969A patent/CA2221969C/en not_active Expired - Lifetime
- 1996-05-24 WO PCT/US1996/007774 patent/WO1996037789A1/en active IP Right Grant
-
1998
- 1998-12-22 US US09/219,541 patent/US6163567A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
AU6249696A (en) | 1996-12-11 |
DE69624812D1 (de) | 2002-12-19 |
WO1996037789A1 (en) | 1996-11-28 |
EP0830616A1 (de) | 1998-03-25 |
CA2221969C (en) | 2007-08-07 |
EP0830616B1 (de) | 2002-11-13 |
US6023489A (en) | 2000-02-08 |
US6163567A (en) | 2000-12-19 |
AU724006B2 (en) | 2000-09-07 |
CA2221969A1 (en) | 1996-11-28 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8364 | No opposition during term of opposition |