-
公开(公告)号：DE60143855D1
公开(公告)日：2011-02-24
申请号：DE60143855
申请日：2001-07-06
Applicant: QUALCOMM INC
Inventor： FERNANDEZ-CORBATON IVAN J , RICK ROLAND , AMERGA MESSAY
-
公开(公告)号：CA2393505C
公开(公告)日：2009-10-20
申请号：CA2393505
申请日：2000-12-07
Applicant: QUALCOMM INC
Abstract: A method and apparatus for use in a hybrid position location system. The method and apparatus combines measure-ments from Global Positioning System (GPS) and terrestrial transceiv er stations to compute the location of a device. An algebraic solution to hybrid position location system equations is output from the method and apparatus. The method and apparatus determines the position of a device using a non-iterative method, as against the use of a conventional iterative least mean square method. The method of the present invention can be used to solve the location system equations in scenarios where a non-iterative solution is desirable. In certain scenarios, the location system equations may have two possible solutions. An iterative method would converge on one of the solutions, without any indication of the existence of the othe r ambiguous solution. Moreover, the iterative method may converge on the incorrect of the two ambiguous solutions. Use of the presently disclosed method and apparatus yields both the ambiguous solutios. The disclosed method may be followed up with iterative methods, using the solutions from the algebraic method as initial estimates of the device location for the iterative method. A different process can then select the correct solution. Thus, the algebraic method can be used to detect the existence of ambiguous solutions, and to find both solutions.
-
3.发明专利
公开(公告)号：AU2001271894B2
公开(公告)日：2007-08-23
申请号：AU2001271894
申请日：2001-07-06
Applicant: QUALCOMM INC
Inventor： AMERGA MESSAY , RICK ROLAND , FERNANDEZ-CORBATON IVAN J
IPC: H04B1/707 , G01S1/00 , G01S5/02 , G01S5/14 , G01S19/22 , G01S19/40 , G01S19/42 , H04W24/00 , H04W28/04 , H04W84/06
Abstract: A system and method are disclosed by which the effects of time of arrival errors may be reduced. In a mobile unit, such as a CDMA device, a correlation pulse is generated when a transmitted code matches a stored reference code. In the absence of multipath effects, correlation pulses are generated in response to the detection of multiple transmissions of the reference code from multiple transmitters. However, multipath effects distort the generated correlation pulses leading to errors in the time of arrival measurements. The present invention calculates the width of the correlation pulses and determines a delay correction factor based on the pulse width. The delay correction factor is added to the measured delay time to provide a more accurate delay time, thus permitting more accurate location measurements based on time of arrival. In alternative embodiments, other signal factors may also be used to apply delay correction factors. The actual location determination may be performed by the mobile unit, or any other positioning determining entity (PDE). The system is also capable of applying correction factors to time of arrival signals received from global positioning system (GPS) satellites.
-
公开(公告)号：AR034468A1
公开(公告)日：2004-02-25
申请号：ARP020102202
申请日：2002-06-11
Applicant: QUALCOMM INC
Inventor： FERNANDEZ-CORBATON IVAN J , QUALCOMM INCORPORATED , RICK ROLAND
IPC: G01S1/00 , G01S1/02 , G01S5/02 , G01S5/10 , G01S19/22 , G01S19/40 , G01S19/42 , G01S19/48 , H04B1/10 , H04B1/711 , H04B1/7117 , H04W24/00 , H04W28/04 , H04W84/06 , H04B1/707 , H04Q7/38 , G01S5/14
Abstract: Se divulgan un sistema y un método mediante los cuales se pueden disminuir los efectos de los errores de tiempo de llegada. En una unidad móvil, como un dispositivo CDMA, se genera un pulso de correlación cuando un código transmitido coincide con un código de referencia almacenado. En ausencia de efectos de múltiples trayectorias, los pulsos de correlación se generan en respuesta a la detección de múltiples transmisiones del código de referencia desde múltiples transmisores. Sin embargo, los efectos de múltiples trayectorias distorsionan los pulsos de correlación generados, lo que lleva a errores en las mediciones del tiempo de llegada. La presente invención calcula el ancho de los pulsos de correlación y determina un factor de corrección de retraso sobre la base del ancho del pulso. El factor de corrección de retraso se agrega al tiempo de retraso medido para proveer un tiempo de retraso más preciso y por lo tanto permitir mediciones de localización más precisas sobre la base del tiempo de llegada. En otras realizaciones, se pueden utilizar otros factores de senal para aplicar factores de corrección de retraso. La unidad móvil, u otro ente para determinar el posicionamiento (PDE) puede realizar la determinación de localización en sí. Asimismo, el sistema es capaz de aplicar factores de corrección a senales de tiempo de llegada recibidos desde un satélite de un sistema de posicionamiento global
-
5.发明专利
公开(公告)号：CA2450308A1
公开(公告)日：2003-01-03
申请号：CA2450308
申请日：2001-07-06
Applicant: QUALCOMM INC
Inventor： AMERGA MESSAY , RICK ROLAND , FERNANDEZ-CORBATON IVAN J
IPC: G01S1/00 , G01S5/02 , G01S5/14 , G01S19/22 , G01S19/40 , G01S19/42 , H04B1/707 , H04W24/00 , H04W28/04 , H04W84/06 , G01S1/02 , H04Q7/38
Abstract: A system and method are disclosed by which the effects of time of arrival errors may be reduced. In a mobile unit, such as a CDMA device, a correlatio n pulse is generated when a transmitted code matches a stored reference code. In the absence of multipath effects, correlation pulses are generated in respon se to the detection of multiple transmissions of the reference code from multip le transmitters. However, multipath effects distort the generated correlation pulses leading to errors in the time of arrival measurements. The present invention calculates the width of the correlation pulses and determines a delay correction factor based on the pulse width. The delay correction facto r is added to the measured delay time to provide a more accurate delay time, thus permitting more accurate location measurements based on time of arrival . In alternative embodiments, other signal factors may also be used to apply delay correction factors. The actual location determination may be performed by the mobile unit, or any other positioning determining entity (PDE). The system is also capable of applying correction factors to time of arrival signals received from global positioning system (GPS) satellites.
-
Patent Agency Ranking
公开(公告)号：AU5074501A
公开(公告)日：2001-07-09
申请号：AU5074501
申请日：2000-12-07
Applicant: QUALCOMM INC
Abstract: A method and apparatus for use in a hybrid position location system. The method and apparatus combines measurements from Global Positioning System (GPS) and terrestrial transceiver stations to compute the location of a device. An algebraic solution to hybrid position location system equations is output from the method and apparatus. The method and apparatus determines the position of a device using a non-iterative method, as against the use of a conventional iterative least mean square method. The method of the present invention can be used to solve the location system equations in scenarios where a non-iterative solution is desirable. In certain scenarios, the location system equations may have two possible solutions. An iterative method would converge on one of the solutions, without any indication of the existence of the other ambiguous solution. Moreover, the iterative method may converge on the incorrect of the two ambiguous solutions. Use of the presently disclosed method and apparatus yields both the ambiguous solutions. The disclosed method may be followed up with iterative methods, using the solutions from the algebraic method as initial estimates of the device location for the iterative method. A different process can then select the correct solution. Thus, the algebraic method can be used to detect the existence of ambiguous solutions, and to find both solutions.
-
-
8.发明专利
公开(公告)号：MY135201A
公开(公告)日：2008-02-29
申请号：MYPI20022144
申请日：2002-06-10
Applicant: QUALCOMM INC
Inventor： FERNANDEZ-CORBATON IVAN J , ROLAND RICK , MESSAY AMERGA
IPC: G01S1/00 , G01S1/02 , G01S5/02 , G01S5/10 , G01S19/22 , G01S19/40 , G01S19/42 , G01S19/48 , H04B1/10 , H04B1/711 , H04B1/7117 , H04W24/00 , H04W28/04 , H04W84/06
Abstract: A SYSTEM AND METHOD ARE DISCLOSED BY WHICH THE EFFECTS OF TIME OF ARRIVAL ERRORS MAY BE REDUCED. IN A MOBILE UNIT (10), SUCH AS A COMA DEVICE, A CORRELATION PULSE IS GENERATED WHEN A TRANSMITTED CODE MATCHES A STORED REFERENCE CODE. IN THE ABSENCE OF MULTIPATH EFFECTS, CORRELATION PULSES ARE GENERATED IN RESPONSE TO THE DETECTION OF MULTIPLE TRANSMISSIONS OF THE REFERENCE CODE FROM MULTIPLE TRANSMITTERS (12, 14, 16). HOWEVER, MULTIPATH EFFECTS DISTORT THE GENERATED CORRELATION PULSES LEADING TO ERRORS IN THE TIME OF ARRIVAL MEASUREMENTS. THE PRESENT INVENTION CALCULATES THE WIDTH OF THE CORRELATION PULSES AND DETERMINES A DELAY CORRECTION FACTOR BASED ON THE PULSE WIDTH. THE DELAY CORRECTION FACTOR IS ADDED TO THE MEASURED DELAY TIME TO PROVIDE A MORE ACCURATE DELAY TIME, THUS PERMITTING MORE ACCURATE LOCATION MEASUREMENTS BASED ON TIME OF ARRIVAL. IN ALTERNATIVE EMBODIMENTS, OTHER SIGNAL FACTORS MAY ALSO BE USED TO APPLY DELAY CORRECTION FACTORS. THE ACTUAL LOCATION DETERMINATION MAY BE PERFORMED BY THE MOBILE UNIT (10), OR ANY OTHER POSITIONING DETERMINING ENTITY (POE). THE SYSTEM IS ALSO CAPABLE OF APPLYING CORRECTION FACTORS TO TIME OF ARRIVAL SIGNALS RECEIVED FROM GLOBAL POSITIONING SYSTEM (GPS) SATELLITES.(FIG 6 & 7)
-
公开(公告)号：CA2393505A1
公开(公告)日：2001-07-05
申请号：CA2393505
申请日：2000-12-07
Applicant: QUALCOMM INC
Abstract: A method and apparatus for use in a hybrid position location system. The method and apparatus combines measurements from Global Positioning System (GPS) and terrestrial transceiver stations to compute the location of a device. An algebraic solution to hybrid position location system equations i s output from the method and apparatus. The method and apparatus determines th e position of a device using a non-iterative method, as against the use of a conventional iterative least mean square method. The method of the present invention can be used to solve the location system equations in scenarios where a non-iterative solution is desirable. In certain scenarios, the location system equations may have two possible solutions. An iterative meth od would converge on one of the solutions, without any indication of the existence of the other ambiguous solution. Moreover, the iterative method ma y converge on the incorrect of the two ambiguous solutions. Use of the present ly disclosed method and apparatus yields both the ambiguous solutios. The disclosed method may be followed up with iterative methods, using the solutions from the algebraic method as initial estimates of the device location for the iterative method. A different process can then select the correct solution. Thus, the algebraic method can be used to detect the existence of ambiguous solutions, and to find both solutions.
-
10.发明申请METHOD AND APPARATUS FOR DETERMINING AN ALGEBRAIC SOLUTION TO GPS TERRESTRIAL HYBRID LOCATION SYSTEM EQUATIONS 审中-公开用于确定GPS地理混合位置系统方程的方法和装置
公开(公告)号：WO0148506A3
公开(公告)日：2002-03-21
申请号：PCT/US0033375
申请日：2000-12-07
Applicant: QUALCOMM INC
Abstract: A method and apparatus for use in a hybrid position location system. The method and apparatus combines measurements from Global Positioning System (GPS) and terrestrial transceiver stations to compute the location of a device. An algebraic solution to hybrid position location system equations is output from the method and apparatus. The method and apparatus determines the position of a device using a non-iterative method, as against the use of a conventional iterative least mean square method. The method of the present invention can be used to solve the location system equations in scenarios where a non-iterative solution is desirable. In certain scenarios, the location system equations may have two possible solutions. An iterative method would converge on one of the solutions, without any indication of the existence of the other ambiguous solution. Moreover, the iterative method may converge on the incorrect of the two ambiguous solutions. Use of the presently disclosed method and apparatus yields both the ambiguous solutios. The disclosed method may be followed up with iterative methods, using the solutions from the algebraic method as initial estimates of the device location for the iterative method. A different process can then select the correct solution. Thus, the algebraic method can be used to detect the existence of ambiguous solutions, and to find both solutions.
Abstract translation: 一种用于混合位置定位系统的方法和装置。 该方法和装置将来自全球定位系统（GPS）和地面收发台的测量结合在一起，以计算设备的位置。 从方法和装置输出混合位置定位系统方程的代数解。 方法和装置使用非迭代方法来确定装置的位置，与使用传统的迭代最小均方法相比。 本发明的方法可用于在需要非迭代解的情况下解决位置系统方程。 在某些情况下，定位系统方程可能有两种可能的解决方案。 迭代方法会收敛于其中一个解，而没有任何指示存在其他不明确的解决方案。 此外，迭代方法可能会收敛于两个模糊解的不正确。 使用目前公开的方法和装置产生两个不明确的溶质。 所公开的方法可以跟随迭代方法，使用来自代数方法的解决方案作为用于迭代方法的设备位置的初始估计。 然后，不同的过程可以选择正确的解决方案。 因此，代数方法可以用于检测模糊解的存在，并找到两种解决方案。
-
-
-
-
-
-
-
-
-
Search Results
10
records
(took 0.022 seconds)
