-
公开(公告)号：EP1454161B1
公开(公告)日：2011-06-29
申请号：EP02792387.9
申请日：2002-12-12
发明人： RICK, Roland, R. , STEIN, Jeremy , AMERGA, Messay , FERNANDEZ-CORBATON, Ivan , RISTIC, Borislav , BHATIA, Ashok
IPC分类号： G01S5/14
CPC分类号： H04W64/00 , G01S5/0257 , G01S19/48
摘要： A position determination system and apparatus for utilizing a network of cellular base stations to determine position of a mobile station includes taking a plurality of statistically independent data measurements of the pilot signals from the base stations. Each of the data measurements includes an earliest time of arrival, providing multiple independent measurements for each of the pilot signals. For each cellular base station, a representative measurement is calculated responsive to the independent measurements, which is used to determine position of the mobile station using an AFLT algorithm and/or in conjunction with a GPS algorithm. In some embodiments, the data measurements for each pilot signal further include an RMSE estimate and time of measurement for each time of arrival, and an energy measurement for all resolvable paths. If the mobile station comprises a cell phone, a cell search list and a GPS search list may be provided by a cell base station.
-
公开(公告)号：EP1121761A1
公开(公告)日：2001-08-08
申请号：EP99953179.1
申请日：1999-10-12
CPC分类号： H03M13/2957 , H03M13/2742 , H03M13/2757 , H03M13/2764 , H03M13/2771 , H03M13/2789 , H04L1/0043 , H04L1/005 , H04L1/0052 , H04L1/0066
摘要： The present invention is a novel and improved technique for performing coding with particular application to turbo, or iterative, coding techniques. In accordance with one embodiment of the invention, interleaving is performed by generating the address of a memory using a PN state generator. Data is written into a memory (26) in sequential order, and then read out using addresses specified by the PN state generator. To deinterleave, the interleaved data is written into a memory (16) using addresse specified by the PN state generator. To de interleave, the interleaved data is written into a memory (26) using addresses specified by the PN state generator, and then read out in sequential order. A set of PN state generators that provide excellent coding performance is provided.
-
公开(公告)号：EP1779563B1
公开(公告)日：2009-05-06
申请号：EP05782488.0
申请日：2005-08-03
发明人： STEIN, Jeremy , YONA, Eli , WEISSMAN, Haim , LEVIANT, Michael
IPC分类号： H04B17/00
CPC分类号： H04B17/382 , H04B17/318
摘要： A method for estimating a size of reverse link resources provided by a base-station transceiver system (BTS), including performing respective first, second, and third measurements of first, second, and third signal strengths received at the BTS. The method also includes comparing the first measurement with the second measurement so as to determine an initial minimum signal strength, and adding at a predetermined time an aging value to the initial minimum signal strength so as to form an updated minimum signal strength. The method further includes forming a comparison between the updated minimum signal strength and the third measurement, determining from the comparison a minimum of the updated minimum signal strength and the third measurement to be a minimum received signal strength, and determining the size of the reverse link resources provided by the BTS in response to the minimum received signal strength.
-
公开(公告)号：EP1779563A1
公开(公告)日：2007-05-02
申请号：EP05782488.0
申请日：2005-08-03
发明人： STEIN, Jeremy , YONA, Eli , WEISSMAN, Haim , LEVIANT, Michael
IPC分类号： H04B17/00
CPC分类号： H04B17/382 , H04B17/318
摘要： A method for estimating a size of reverse link resources provided by a base-station transceiver system (BTS), including performing respective first, second, and third measurements of first, second, and third signal strengths received at the BTS. The method also includes comparing the first measurement with the second measurement so as to determine an initial minimum signal strength, and adding at a predetermined time an aging value to the initial minimum signal strength so as to form an updated minimum signal strength. The method further includes forming a comparison between the updated minimum signal strength and the third measurement, determining from the comparison a minimum of the updated minimum signal strength and the third measurement to be a minimum received signal strength, and determining the size of the reverse link resources provided by the BTS in response to the minimum received signal strength.
-
公开(公告)号：EP1454161A2
公开(公告)日：2004-09-08
申请号：EP02792387.9
申请日：2002-12-12
发明人： RICK, Roland, R. , STEIN, Jeremy , AMERGA, Messay , FERNANDEZ-CORBATON, Ivan , RISTIC, Borislav , BHATIA, Ashok
IPC分类号： G01S5/14
CPC分类号： H04W64/00 , G01S5/0257 , G01S19/48
摘要： A position determination system and apparatus for utilizing a network of cellular base stations to determine position of a mobile station includes taking a plurality of statistically independent data measurements of the pilot signals from the base stations. Each of the data measurements includes an earliest time of arrival, providing multiple independent measurements for each of the pilot signals. For each cellular base station, a representative measurement is calculated responsive to the independent measurements, which is used to determine position of the mobile station using an AFLT algorithm and/or in conjunction with a GPS algorithm. In some embodiments, the data measurements for each pilot signal further include an RMSE estimate and time of measurement for each time of arrival, and an energy measurement for all resolvable paths. If the mobile station comprises a cell phone, a cell search list and a GPS search list may be provided by a cell base station.
-
公开(公告)号：EP1454419A1
公开(公告)日：2004-09-08
申请号：EP02734738.4
申请日：2002-06-06
IPC分类号： H04B1/707
CPC分类号： H04W64/00 , G01S5/02 , G01S5/0221
摘要： A system and method for accurately determining time of arrival using a mathematical model that mimics a correlation function. A correlation value is sampled at a predetermined periodic interval and a maximum correlation value, coinciding with a particular point in time, is determined. The mathematical model uses the maximum measured correlation value and correlation values at adjacent sample points to determine coefficients for the selected mathematical model. The coefficients may be calculated and used to determine the actual peak, which may fall in-between the sample points. The actual peak value is used to accurately determine the time of arrival of a signal. Time of arrival signals from a plurality of remote transmitters are used along with conventional triangulation techniques to accurately determine the location of the wireless unit.
-
-
-
-
-
搜索结果
6 条记录 (耗时 0.012 秒)
