公开(公告)号：WO2003036820A1

公开(公告)日：2003-05-01

申请号：PCT/US2002/034015

申请日：2002-10-23

Applicant: QUALCOMM, INCORPORATED

Inventor： ANDERSON, Jon, James ,  DAI, Jin ,  NGAI, Francis, Ming-Meng ,  VICTOR, Edward, B.

IPC: H04B7/185

CPC classification number: H04B7/1855

Abstract: A system and method for determining timing offset errors in a satellite system based upon Doppler and Doppler rate of change is provided. A user terminal (110, 113) determines first and second timing offsets (902, 906) respectively associated with first and second satellite beams (1142, 120 4 ) from respective first and second satellites (102, 104). Next, the user terminal (110, 113) determines the Doppler and Doppler rate of change associated with the first and second satellite beams (1100, 1102). A timing offset is estimated from the measured Doppler and Doppler rate of change and is then compared with the user terminal's own determined timing offset (906). If the comparison does not produce a value within a predetermined threshold, a beam identification error is declared.

Abstract translation: 提供了一种用于基于多普勒和多普勒频率来确定卫星系统中的定时偏移误差的系统和方法。 用户终端（110,113）从相应的第一和第二卫星（102,104）确定分别与第一和第二卫星波束（1142,1204）相关联的第一和第二定时偏移（902,906）。 接下来，用户终端（110,113）确定与第一和第二卫星光束（1100,1102）相关联的多普勒和多普勒频率变化。 根据测量的多普勒和多普勒频率估计定时偏移，然后将其与用户终端自己确定的定时偏移进行比较（906）。 如果比较不产生预定阈值内的值，则声明波束识别误差。

公开(公告)号：WO2004004380A1

公开(公告)日：2004-01-08

申请号：PCT/US2003/020913

申请日：2003-07-01

Applicant: QUALCOMM INCORPORATED

Inventor： ROSS, David J. ,  KENAGY, Jason B. ,  DAI, Jin ,  CASSETT, Tia M. ,  AGRE, Daniel H. ,  CHMAYTELLI, Mazen ,  MORTENSEN, Arne, croizat, Joseph ,  CHANDHOK, Ravinder

IPC: H04Q7/20

CPC classification number: H04W24/00 ,  H04W8/22 ,  H04W24/02

Abstract: A system (10), method, and program for optimizing a wireless network (14) having at least data communication between computer devices (12, 18, 20, 22) selectively connected thereto, and at least one of the computer devices (12, 18, 20, 22) is a remotely located wireless device. The wireless device (12, 18, 20, 22) has a resident network optimization application that causes the selective transmission of network status data to at least one other computer device on the wireless network (14), and either the data-receiving computer device (12, 18, 22, 22) or another computer device (12, 18, 20, 22) on the wireless network (14) optimizes the wireless network (14) based upon the received network status data.

Abstract translation: 一种用于优化无线网络（14）的系统（10），方法和程序，所述无线网络（14）至少具有与其选择性连接的计算机设备（12,18,20,22）之间的数据通信，并且所述计算机设备 18,20,22）是位于远程的无线设备。 无线设备（12,18,20,22）具有常驻网络优化应用，其使网络状态数据选择性地传输到无线网络（14）上的至少一个其他计算机设备，以及数据接收计算机设备 （12,18,22,22）或所述无线网络（14）上的另一个计算机设备（12,18,20,22）基于所接收的网络状态数据优化所述无线网络（14）。

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

Applicant: QUALCOMM INCORPORATED

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

IPC: G01S5/12

CPC classification number: H04B7/1855 ,  G01S5/12 ,  G01S19/00 ,  G01S19/38

Abstract: 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：EP1438794A1

公开(公告)日：2004-07-21

申请号：EP02802204.4

申请日：2002-10-23

Applicant: Qualcomm, Incorporated

Inventor： ANDERSON, Jon, James ,  DAI, Jin ,  NGAI, Francis, Ming-Meng ,  VICTOR, Edward, B.

IPC: H04B7/185

CPC classification number: H04B7/1855

Abstract: A system and method for determining timing offset errors in a satellite system based upon Doppler and Doppler rate of change is provided. A user terminal (110, 113) determines first and second timing offsets (902, 906) respectively associated with first and second satellite beams (1142, 1204) from respective first and second satellites (102, 104). Next, the user terminal (110, 113) determines the Doppler and Doppler rate of change associated with the first and second satellite beams (1100, 1102). A timing offset is estimated from the measured Doppler and Doppler rate of change and is then compared with the user terminal's own determined timing offset (906). If the comparison does not produce a value within a predetermined threshold, a beam identification error is declared.

公开(公告)号：EP1438794B1

公开(公告)日：2008-10-08

申请号：EP02802204.4

申请日：2002-10-23

Applicant: Qualcomm, Incorporated

Inventor： ANDERSON, Jon, James ,  DAI, Jin ,  NGAI, Francis, Ming-Meng ,  VICTOR, Edward, B.

IPC: H04B7/185

CPC classification number: H04B7/1855

公开(公告)号：EP1121604A1

公开(公告)日：2001-08-08

申请号：EP99968720.5

申请日：1999-09-08

Applicant: QUALCOMM Incorporated

Inventor： DAI, Jin

IPC: G01S5/12 ,  G01S5/14

CPC classification number: G01S5/14 ,  G01S5/12

Abstract: An apparatus, method, and process for quickly and accurately determining the position of a user terminal (124, 126) in a satellite communications system (100). An initial coarse estimate of the radius of the Earth at a terminal position is made (302, 402). The geometry of satellites being used (116, 118) and the user terminal (124, 126) is then determined. When only one satellite is used, the satellite-user terminal geometry includes the range (306, 406) and range rate (306) of the satellite with respect to the user terminal (124, 126). When two satellites are used, the satellite-user terminal geometry includes the range (406, 408) of each satellite (116, 118) with respect to the user terminal (124, 126). An initial position estimate is determined based on the radius and the satellite-user terminal geometry. The coarse radius estimate (304, 404) can then be formed into a fine estimate (310, 412) and the initial position estimate further refined.

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

Applicant: QUALCOMM Incorporated

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

IPC: G01S5/12

CPC classification number: H04B7/1855 ,  G01S5/12 ,  G01S19/00 ,  G01S19/38

Abstract: 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：EP1518425B1

公开(公告)日：2012-06-20

申请号：EP03762322.0

申请日：2003-07-01

Applicant: QUALCOMM INCORPORATED

Inventor： ROSS, David J. ,  KENAGY, Jason B. ,  DAI, Jin ,  CASSETT, Tia M. ,  AGRE, Daniel H. ,  CHMAYTELLI, Mazen ,  MORTENSEN, Arne, croizat, Joseph ,  CHANDHOK, Ravinder

IPC: H04W24/00

CPC classification number: H04W24/00 ,  H04W8/22 ,  H04W24/02

Abstract: A system (10), method, and program for optimizing a wireless network (14) having at least data communication between computer devices (12, 18, 20, 22) selectively connected thereto, and at least one of the computer devices (12, 18, 20, 22) is a remotely located wireless device. The wireless device (12, 18, 20, 22) has a resident network optimization application that causes the selective transmission of network status data to at least one other computer device on the wireless network (14), and either the data-receiving computer device (12, 18, 22, 22) or another computer device (12, 18, 20, 22) on the wireless network (14) optimizes the wireless network (14) based upon the received network status data.

公开(公告)号：EP1518425A1

公开(公告)日：2005-03-30

申请号：EP03762322.0

申请日：2003-07-01

Applicant: Qualcomm Incorporated

Inventor： ROSS, David J. ,  KENAGY, Jason B. ,  DAI, Jin ,  CASSETT, Tia M. ,  AGRE, Daniel H. ,  CHMAYTELLI, Mazen ,  MORTENSEN, Arne, croizat, Joseph ,  CHANDHOK, Ravinder

IPC: H04Q7/20

CPC classification number: H04W24/00 ,  H04W8/22 ,  H04W24/02

Abstract: A system (10), method, and program for optimizing a wireless network (14) having at least data communication between computer devices (12, 18, 20, 22) selectively connected thereto, and at least one of the computer devices (12, 18, 20, 22) is a remotely located wireless device. The wireless device (12, 18, 20, 22) has a resident network optimization application that causes the selective transmission of network status data to at least one other computer device on the wireless network (14), and either the data-receiving computer device (12, 18, 22, 22) or another computer device (12, 18, 20, 22) on the wireless network (14) optimizes the wireless network (14) based upon the received network status data.