Performance Analysis and Improvement for TDOA Source Localization in the Presence of Synchronization Clock Bias[J]. Acta Electronica Sinica, 2018, 46(6): 1281-1288.
Performance Analysis and Improvement for TDOA Source Localization in the Presence of Synchronization Clock Bias[J]. Acta Electronica Sinica, 2018, 46(6): 1281-1288. DOI: 10.3969/j.issn.0372-2112.2018.06.001.
Synchronization clock bias can significantly increase the localization errors.In order to solve this problem
this paper presents theoretical analysis and the improved method.First
the Cramr-Rao bound(CRB) on the parameter estimation is shown in the presence of synchronization clock bias.A more compact CRB expression for the source position estimation is obtained.Based on the maximum likelihood(ML)criterion and the Taylor series(TS) localization method
an analytical expression for the mean square error(MSE) of the source position estimation is also derived when the estimator assumes the clock bias does not exist.Subsequently
the localization method based on dimension-reduction TS iteration is presented and the closed-form ML solution for the clock bias is also given.Finally
numerical experimental results support the validation of the theoretical analysis
and also demonstrate that the proposed method can mitigate the effects of clock bias.