公开(公告)号：EP1110100A1

公开(公告)日：2001-06-27

申请号：EP99951409.4

申请日：1999-09-08

申请人： QUALCOMM Incorporated

发明人： DAI, Jin ,  LEVANON, Nadav ,  AMES, Bill ,  VICTOR, Ed ,  DETERMAN, Jim

IPC分类号： G01S5/12

CPC分类号： H04B7/1855 ,  G01S5/12 ,  G01S19/00 ,  G01S19/38

摘要： The present invention is a system and method for accurately determining the distance (range and range rate) between one or more satellites (116, 118) and a user terminal (124, 126) in order to determine the location of the user terminal (124, 126). When one satellite is available, the present invention determines the range (516) and range rate (516) based on the Doppler frequency shift (504) between the satellite (116, 118) and the user terminal (124, 126), the round trip delay (510) from the satellite (116, 118) to the user terminal (124, 126) and back via a satellite to a gateway (120, 122), the Doppler frequency shift (512) between the satellite (116, 118) and the gateway (120, 122), and the timestamps of the measurements (506, 514). When a second satellite is available, the present invention determines the range (610) and range rate (610) between the second satellite and the user terminal (124, 126) based on the round trip delay, the Doppler frequency shift between the second satellite and the user terminal (124, 126), and the difference in arrival times (604) at the user terminal (124, 126) of the signals from the satellites (116, 118).

公开(公告)号：EP1110100B1

公开(公告)日：2007-04-04

申请号：EP99951409.4

申请日：1999-09-08

申请人： QUALCOMM INCORPORATED

发明人： DAI, Jin ,  LEVANON, Nadav ,  AMES, Bill ,  VICTOR, Ed ,  DETERMAN, Jim

IPC分类号： G01S5/12

CPC分类号： H04B7/1855 ,  G01S5/12 ,  G01S19/00 ,  G01S19/38

摘要： The present invention is a system and method for accurately determining the distance (range and range rate) between one or more satellites (116, 118) and a user terminal (124, 126) in order to determine the location of the user terminal (124, 126). When one satellite is available, the present invention determines the range (516) and range rate (516) based on the Doppler frequency shift (504) between the satellite (116, 118) and the user terminal (124, 126), the round trip delay (510) from the satellite (116, 118) to the user terminal (124, 126) and back via a satellite to a gateway (120, 122), the Doppler frequency shift (512) between the satellite (116, 118) and the gateway (120, 122), and the timestamps of the measurements (506, 514). When a second satellite is available, the present invention determines the range (610) and range rate (610) between the second satellite and the user terminal (124, 126) based on the round trip delay, the Doppler frequency shift between the second satellite and the user terminal (124, 126), and the difference in arrival times (604) at the user terminal (124, 126) of the signals from the satellites (116, 118).

公开(公告)号：EP1166144A1

公开(公告)日：2002-01-02

申请号：EP00919990.2

申请日：2000-03-31

申请人： QUALCOMM Incorporated

发明人： LEVANON, Nadav

IPC分类号： G01S5/12 ,  H04B7/185

CPC分类号： G01S5/12 ,  G01S1/026 ,  G01S1/045 ,  G01S5/0054 ,  G01S2205/008

摘要： An improved method for determining the location of a user terminal with a high degree of accuracy. By repeating N times the basic active positioning measurement sets, a much better accuracy is reached that will be of value to the user. According to the method of the present invention, the user makes a position call (404). A position call prompts a gateway to establish a traffic channel (406) on which a positioning message (408) will yield the basic set of measurements: round-trip delay and round-trip Doppler in single-satellite positioning, and the addition of delay-difference and Doppler difference to a second satellite in two-satellite positioning. The accumulated measurements are used to determine position and theoretical error (410, 412). The call is terminated when an accuracy threshold is reached or a time limit has expired. The user terminal receives a position message or a failure message (416).

公开(公告)号：EP0941486A1

公开(公告)日：1999-09-15

申请号：EP97944498.0

申请日：1997-09-26

申请人： QUALCOMM INCORPORATED

发明人： LEVANON, Nadav

IPC分类号： G01S5 ,  G01S13 ,  G01S19 ,  H04B7 ,  H04Q7

CPC分类号： H04B7/18554 ,  G01S5/0036 ,  G01S5/12 ,  G01S13/08 ,  G01S13/74 ,  G01S2013/466

摘要： A system and method for determining the position of a user terminal (for example, a mobile wireless telephone) in a low-Earth orbit satellite communications system (100). The system includes a user terminal (106), at least one satellite (104) with a known position and velocity, and a gateway (102) (that is, a terrestrial base station) for communicating with the user terminal (106) through the satellite (104). The method includes the steps of determining a range parameter (802) and a range-rate parameter (806). A range parameter represents a distance between the satellite and the user terminal. A range-rate parameter represents a relative radial velocity between that satellite and the user terminal. The position of the user terminal on the Earth's surface is then determined (810) based on the range parameter, the range-rate parameter, and the known position and velocity of the satellite.

公开(公告)号：EP0929822A1

公开(公告)日：1999-07-21

申请号：EP97945313.0

申请日：1997-09-26

申请人： QUALCOMM INCORPORATED

发明人： LEVANON, Nadav ,  VICTOR, Edward, B. ,  VEMBU, Sridhar

IPC分类号： G01S19 ,  G01S5 ,  H04B7 ,  H04Q7

CPC分类号： G01S5/12 ,  G01S2205/008

摘要： A system and method for unambiguously determining the position of a user terminal (for example, a mobile wireless telephone) in a low-Earth orbit satellite communications system (100). The system includes a user terminal (106), at least two satellites (104A, 1104B) with known positions and known velocities, and a gateway (102) (that is, a terrestrial base station) for communicating with the user terminal (106) through the satellites (104A, 104B). The method includes the steps of determining a range parameter (1002, 1102, 1202), a range difference parameter (1004, 1104, 1204), and either or both of a range-rate parameter (1106, 1206) and a range-rate difference parameter (1008, 1208). A range parameter represents a distance between one of the satellites (104B, 104B) and the user terminal (106). A range difference parameter represents the difference between (1) the distance between a first one of the satellites (104B, 104B) and the user terminal (106) and (2) the distance between a second one of the satellites (104A, 104B) and the user terminal (106). A range-rate parameter represents a relative radial velocity between one of the satellites (104A, 104B) and the user terminal (106). A range-rate difference parameter represents the difference between (a) a relative radial velocity between a first one of the satellites (104A, 104B) and the user terminal (106) and (b) a relative radial velocity between a second one of the satellites (104A, 104B) and the user terminal (106). The position of the user terminal (106) on the Earth's surface is then determined based on the known positions and known velocities of the satellites (104A, 104B), the range parameter, the range difference parameter, and either or both of the range-rate parameter and the range-rate difference parameter.

公开(公告)号：EP1166144B1

公开(公告)日：2009-04-15

申请号：EP00919990.2

申请日：2000-03-31

申请人： QUALCOMM INCORPORATED

发明人： LEVANON, Nadav

IPC分类号： G01S5/12 ,  H04B7/185

CPC分类号： G01S5/12 ,  G01S1/026 ,  G01S1/045 ,  G01S5/0054 ,  G01S2205/008

公开(公告)号：EP0941486B1

公开(公告)日：2003-01-22

申请号：EP97944498.1

申请日：1997-09-26

申请人： QUALCOMM INCORPORATED

发明人： LEVANON, Nadav

IPC分类号： G01S5/12 ,  G01S13/74

CPC分类号： H04B7/18554 ,  G01S5/0036 ,  G01S5/12 ,  G01S13/08 ,  G01S13/74 ,  G01S2013/466

公开(公告)号：EP1166588A1

公开(公告)日：2002-01-02

申请号：EP00919917.5

申请日：2000-03-28

申请人： QUALCOMM Incorporated

发明人： SOLIMAN, Samir, S. ,  LEVANON, Nadav

IPC分类号： H04Q7/38

CPC分类号： H04W64/00 ,  G01S5/12

摘要： A method and apparatus to determine the position (116) of a remote station, such as a mobile cellular telephone using relative delay and absolute-range measurements. More particularly, the invention determines the position of a remote station (116) using a combination of forward link measurements made at the remote station (116) and reverse link measurements made at one or more base stations (106, 108). These measurements are used to perform calculations that yield the position of the remote station (116). An apparatus performing the calculations may use a-priori information on the exact location of all base stations participating in the mobile location determination, as well as inherent delay calibrations associated with the base stations.

公开(公告)号：EP0929823A2

公开(公告)日：1999-07-21

申请号：EP97953025.0

申请日：1997-09-26

申请人： QUALCOMM INCORPORATED

发明人： LEVANON, Nadav

IPC分类号： G01S5 ,  G01S19 ,  H04B7

CPC分类号： G01S5/12 ,  G01S5/0027 ,  H04B7/18547 ,  H04B7/18554

摘要： A system and method for passively determining the position of a user terminal (for example, a mobile wireless telephone) in a low-Earth orbit satellite communications system (100). The system includes a user terminal (106A, 106B, 106C), at least two satellites (104A, 104B) with known positions and known velocities, and a gateway (102) (that is, a terrestrial base station) for communicating with the user terminal (106A, 106B, 106C) through the satellites (104A, 104B). The method includes the steps of determining a range difference parameter (804) and a range-rate difference parameter (806). A range difference parameter represents the difference between (1) the distance between a first one of the satellites (104A, 104B) and the user terminal (106A, 106B, 106C) and (2) the distance between a second one of the satellites (104A, 104B) and the user terminal (106A, 106B, 106C). A range-rate difference parameter represents the difference between (a) a relative radial velocity between a first one of the satellites (104A, 104B) and the user terminal (106A, 106B, 106C) and (b) a relative radial velocity between a second one of the satellites (104A, 104B) and the user terminal (106A, 106B, 106C). The position of the user terminal (106A, 106B, 106C) on the Earth's surface is then determined (810) based on the known positions and known velocities of the satellites, the range difference parameter, and the range-rate difference parameter.

公开(公告)号：EP1112503B1

公开(公告)日：2010-01-27

申请号：EP99968717.1

申请日：1999-09-08

申请人： QUALCOMM INCORPORATED

发明人： AGRAWAL, Avneesh ,  VIJAYAN, Rajiv ,  LEVANON, Nadav

IPC分类号： G01S1/04 ,  H04L27/233 ,  H03J7/04 ,  G01R25/00

CPC分类号： G01S1/045 ,  G01R29/0892 ,  H03J7/04 ,  H04L27/0014 ,  H04L2027/0067