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    • 6. 发明申请
    • HYBRID GNSS AND TDOA WIRELESS LOCATION SYSTEM
    • 混合GNSS和TDOA无线定位系统
    • WO2010019479A1
    • 2010-02-18
    • PCT/US2009/053185
    • 2009-08-07
    • TRUEPOSITION, INC.BOYER, Peter, A.LEFEVER, RonaldMIA, Rashidus, S.ANDERSON, Robert, J.
    • BOYER, Peter, A.LEFEVER, RonaldMIA, Rashidus, S.ANDERSON, Robert, J.
    • H04W24/00
    • G01S19/46
    • A method and apparatus for position determination is provided using measurements from both Global Positioning System (GPS) receivers and terrestrial-based Uplink Time Difference of Arπval (UTDOA) receivers The method involves the transformation of downlink satellite measurements into equivalent UTDOA measurements by computing comparable cross-correlation coefficients and time differences of arrival with respect to a UTDOA reference station The method includes a weighting operation whereby the relative weights of the UTDOA measurements and the relative weights of the GPS measurements are adjusted based on a theoretical scaling followed by empirical adjustments The method further involves the efficient computation and combining ofmetries that are used to minimize the weighted error between candidate location solutions and the UTDOA and GPS measurements This is done efficiently in two dimensions for UTDOA and in three dimensions for GPS measurements by increasing the complexity of searching operations as the optimal location solution is approached
    • 使用来自全球定位系统(GPS)接收机和基于地面的上行链路时间差异(UTDOA)接收机的测量提供了用于位置确定的方法和装置。该方法涉及将下行链路卫星测量转换成等效的UTDOA测量,通过计算可比较的交叉 - 相关系数和相对于UTDOA参考站的到达时间差该方法包括加权操作,其中基于经验调整的理论缩放来调整UTDOA测量的相对权重和GPS测量的相对权重。该方法 进一步涉及用于最小化候选位置解决方案和UTDOA和GPS测量之间的加权误差的方法的有效计算和组合。这对于UTDOA在二维方面有效地进行,并且在三维中针对GPS测量通过增加搜索的复杂度 作为最佳位置解决方案