One method of geolocation is based on measuring the time difference of arrivals (TDOAs) of a signal received by three or four geostationary satellites. The received signals are cross-correlated to determine the TDOAs and a set of nonlinear equations are solved to produce the location estimate. An exact solution for the transmitter position is derived for the three or four receiver cases. Extension of the solution method to more receivers is straightforward. An analysis of the performance of the system is given, together with expressions for predicting the localization mean-square errors (MSEs) and bias, and the Cramer-Rao bound. Both precision in TDOA measurements and the relative geometry between receivers and transmitter affect the localization accuracy. The geometric factors act as multipliers to the TDOA variance in the bias and MSE formulae. A study of the dependency of the geometric factors on transmitter position and satellite spacings are provided, as well as simulation results.<>


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    Title :

    Solution and performance analysis of geolocation by TDOA


    Contributors:
    Ho, K.C. (author) / Chan, Y.T. (author)


    Publication date :

    1993-10-01


    Size :

    955724 byte




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English



    Analysis of Geolocation by TDOA

    Ho, K.C. | Online Contents | 1993


    Comments on "Analysis of geolocation by TDOA"

    Fang, B.T. / Ho, K.C. / Chan, Y.T. | IEEE | 1995


    Comments on "Analysis of Geolocation by TDOA"

    Fang, B.T. | Online Contents | 1995


    Automatic positioning of UAVs to optimize TDOA geolocation performance

    Van Rheeden, D.R. / Brown, B.C. / Price, J.C. et al. | IEEE | 2004


    Automatic Positioning of UAVs to Optimize TDOA Geolocation Performance

    Van Rheeden, D. / IEEE / AIAA | British Library Conference Proceedings | 2004