KR20040102195A - Gps 신호 획득 과정에서의 발진기 주파수 보정 - Google Patents
Gps 신호 획득 과정에서의 발진기 주파수 보정 Download PDFInfo
- Publication number
- KR20040102195A KR20040102195A KR10-2004-7017481A KR20047017481A KR20040102195A KR 20040102195 A KR20040102195 A KR 20040102195A KR 20047017481 A KR20047017481 A KR 20047017481A KR 20040102195 A KR20040102195 A KR 20040102195A
- Authority
- KR
- South Korea
- Prior art keywords
- doppler
- signal
- gps
- estimate
- code phase
- Prior art date
Links
Classifications
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- 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
- G01S19/20—Integrity monitoring, fault detection or fault isolation of space segment
-
- 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
- G01S19/25—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS
- G01S19/256—Acquisition or tracking or demodulation of signals transmitted by the system involving aiding data received from a cooperating element, e.g. assisted GPS relating to timing, e.g. time of week, code phase, timing offset
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- 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
- G01S19/28—Satellite selection
-
- 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
- G01S19/29—Acquisition or tracking or demodulation of signals transmitted by the system carrier including Doppler, related
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Security & Cryptography (AREA)
- Position Fixing By Use Of Radio Waves (AREA)
Abstract
Description
Claims (10)
- GPS 신호 획득 과정에서 발진기 주파수 에러를 보정하는 방법에 있어서,적어도 하나의 전파된 GPS 신호를 수신하는 단계;다수의 도플러 오프셋들을 평가하는 단계;각각의 다수의 상기 도플러 평가들에 대한 다수의 보정 결과들을 생성하기 위해서 상기 신호와 상관하는(correlating) 단계;상관 결과들의 대응 쌍들의 피크 및 널(null) 상태의 크기 간격을 계산하는 단계;피크 및 널 상태에서 가장 큰 크기 간격을 생성하는 상기 도플러 평가를 찾기 위해서 상기 피크 및 널 간격을 검색하는 단계로써, 상기 찾아진 도플러 평가는 상기 적어도 하나의 전파된 GPS 신호를 위한 주파수 에러 평가를 규정하는, 단계; 및상기 발진기 주파수 에러를 보정하기 위해서 GPS 장치의 발진기 주파수에 상기 주파수 에러 평가를 적용하는 단계를 포함하는 방법.
- 제1항에 있어서,신호 인벨로프(envelope) 축적으로부터 코드 위상 평가를 구성하는 단계를 더 포함하는 방법.
- 제1항에 있어서,가장 큰 그리고 다음으로 큰 신호 인벨로프 축적들로부터 코드 위상 평가를 구성하는 단계를 더 포함하는 방법.
- 제3항에 있어서,상기 코드 평가를 구성하는 단계는 CPest= w1CPest1+ w2CPest2에 의해서 정의되며, 여기에서 상기 CPest1는 상기 가장 큰 축적된 신호 인벨로프에 대응된 코드 위상 평가이며, 상기 CPest2는 상기 다음으로 큰 측정된 신호 인벨로프에 대응된 코드 위상 평가이며, 상기 w1= E1/Esum이며, 상기 w2= E2/Esum이며, 여기에서 상기 E1은 가장 큰 축적된 신호 인벨로프이며, 상기 E2는 다음으로 큰 축적된 신호 인벨로프이며, Esum= E1+ E2인 방법.
- 제1항에 있어서,상기 전파된 GPS 신호를 상기 수신하는 단계에서 초기 획득하는데 사용되는 것보다 상기 적어도 하나의 신호 인벨로프 축적을 위해서 코드 위상에 대한 더 작은 이격을 사용하여 적어도 하나의 신호 인벨로프 축적으로부터 코드 위상 평가를 구성하는 단계를 더 포함하는 방법.
- 제1항에 있어서,자동 상관 함수 커브 피트(curve fit)로부터 코드 위상 평가를 구성하는 단계를 더 포함하는 방법.
- 제1항에 있어서,상기 상관 단계는 sin(x)/x 커브를 쫓는 상관 크기를 제공하며, 상기 계산 단계에서, 상기 간격은 상기 커브의 상기 피크 및 널 상태에 대응한 최대 및 최소 상관들 사이에서의 크기 차이에 의해서 평가되는 방법.
- 제7항에 있어서,상기 검색하는 단계는 상기 최대 차이가 찾아질 때까지 (1/T로 분리된) 도플러 평가들의 축적된 신호 인벨로프 탐지의 쌍들을 통해 검색하는 단계를 포함하는 방법.
- 제1항에 있어서,상기 수신하는 단계는 다수의 전파된 GPS 신호들을 수신하는 단계를 포함하며, 상기 상관 단계는 가중된 최소 제곱 평가를 사용해서, 도플러 에러 변조를 제공하기 위해서 각각의 신호의 상기 도플러 에러 평가의 평균을 결정하는 단계를 포함하는 방법.
- 제9항에 있어서,상기 검색하는 단계에서 상기 신뢰성 레벨은 상관에서 상기 가장 큰 그리고 다음으로 큰 간격들의 상기 피크 및 널 레벨에서의 근접성(closeness)으로부터 결정되며, 상기 신뢰성 레벨이 한계값 이하에 있다면, 상기 도플러 평가를 금지하는 것 및 상기 신뢰 레벨이 상기 한계값 이상에 있을 때까지 통합을 계속하는 것 사이에서 결정하는 단계를 더 포함하는 방법.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/136,084 | 2002-04-30 | ||
US10/136,084 US6661371B2 (en) | 2002-04-30 | 2002-04-30 | Oscillator frequency correction in GPS signal acquisition |
PCT/US2003/008169 WO2003093858A2 (en) | 2002-04-30 | 2003-03-17 | Oscillator frequency correction in gps signal acquisition |
Publications (2)
Publication Number | Publication Date |
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KR20040102195A true KR20040102195A (ko) | 2004-12-03 |
KR100734451B1 KR100734451B1 (ko) | 2007-07-02 |
Family
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
KR1020047017481A KR100734451B1 (ko) | 2002-04-30 | 2003-03-17 | Gps 신호 획득 과정에서의 발진기 주파수 보정 |
Country Status (5)
Country | Link |
---|---|
US (1) | US6661371B2 (ko) |
KR (1) | KR100734451B1 (ko) |
CN (1) | CN100384104C (ko) |
AU (1) | AU2003222007A1 (ko) |
WO (1) | WO2003093858A2 (ko) |
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-
2002
- 2002-04-30 US US10/136,084 patent/US6661371B2/en not_active Expired - Lifetime
-
2003
- 2003-03-17 AU AU2003222007A patent/AU2003222007A1/en not_active Abandoned
- 2003-03-17 CN CNB038095920A patent/CN100384104C/zh not_active Expired - Lifetime
- 2003-03-17 KR KR1020047017481A patent/KR100734451B1/ko active IP Right Grant
- 2003-03-17 WO PCT/US2003/008169 patent/WO2003093858A2/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
CN100384104C (zh) | 2008-04-23 |
AU2003222007A8 (en) | 2003-11-17 |
AU2003222007A1 (en) | 2003-11-17 |
KR100734451B1 (ko) | 2007-07-02 |
CN1650187A (zh) | 2005-08-03 |
WO2003093858A3 (en) | 2004-06-10 |
US6661371B2 (en) | 2003-12-09 |
US20030201935A1 (en) | 2003-10-30 |
WO2003093858A2 (en) | 2003-11-13 |
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