发明名称 |
Method for position estimation using generalized error distributions |
摘要 |
A method for improving the results of radio location systems that incorporate weighted least squares optimization generalizes the weighted least squares method by using maximum a posteriori (MAP) probability metrics to incorporate characteristics of the specific positioning problem (e.g., UTDOA). Weighted least squares methods are typically used by TDOA and related location systems including TDOA/AOA and TDOA/GPS hybrid systems. The incorporated characteristics include empirical information about TDOA errors and the probability distribution of the mobile position relative to other network elements. A technique is provided for modeling the TDOA error distribution and the a priori mobile position. A method for computing a MAP decision metric is provided using the new probability distribution models. Testing with field data shows that this method yields significant improvement over existing weighted least squares methods.
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申请公布号 |
US8138976(B2) |
申请公布日期 |
2012.03.20 |
申请号 |
US201113086916 |
申请日期 |
2011.04.14 |
申请人 |
BOYER PETE A.;MIA RASHIDUS S.;SEGALL EDWARD JOSEPH;TRUEPOSITION, INC. |
发明人 |
BOYER PETE A.;MIA RASHIDUS S.;SEGALL EDWARD JOSEPH |
分类号 |
G01S5/02 |
主分类号 |
G01S5/02 |
代理机构 |
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代理人 |
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地址 |
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