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Performance Analysis for Multiple Moving Observers Passive Localization in the Presence of Systematic Errors

XU Zheng1,2, QU Changwen2, WANG Changhai2   

  1. 1. Science and Technology on Avionics Integration Laboratory, Shanghai 200233, China;
    2. Department of Electronic and Information Engineering, Naval Aeronautical and Astronautical University, Yantai 264001, China
  • Received:2012-04-09 Revised:2012-11-22 Online:2013-03-25 Published:2013-03-29
  • Supported by:

    Science and Technology on Avionics Integration Laboratory and Aviation Science Foundation of China (20105584004)

Abstract:

The presence of systematic errors may have great effect on the performance of passive localization of multiple observers. In this paper the Cramer-Rao lower bound (CRLB) is derived with respect to the measurements corrupted by systematic errors which are obtained by multiple moving observers. First, the statistical information of the measurement error is derived according to the specific systematic error model. Because of the dependence of measurements between different time instants caused by the systematic error, the error covariance matrix is non-diagonal. The recursive calculation form is then derived by rewriting the non-diagonal error covariance matrix into the form of block matrixes. Finally, simulation is performed with respect to multiple moving observers bearings-only passive localization and related localization performance analysis is made. Simulation results indicate that systematic errors can have great effect on the CRLB of location error and more attention should be paid to it.

Key words: passive localization, systematic errors, Cramer-Rao lower bound, recursive calculation, bearings-only

CLC Number: