Title :
Adaptive direct position determination of emitters based on time differences of arrival
Author :
Sen Zhong ; Wei Xia ; Zishu He
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
In passive localization systems based on the time difference of arrival, conventional methods usually take two steps for localization. In the first step the time differences of arrival (TDOA) are measured, which are used for localization in the second step. This two-step approach is suboptimal since each measurement of time difference is performed independently, although all measurements correspond to a common emitter position. In this paper, an Adaptive Direct Position Determination (ADPD) approach is proposed, where the position is determined directly from the observed signals in a single step. Monte Carlo simulations validate that the accuracy of proposed ADPD method outperforms the two-step method under low signal-to-noise ratios (SNRs), while both methods are close to the Cramer-Rao lower bound (CRLB) under high SNRs.
Keywords :
Monte Carlo methods; adaptive signal detection; signal denoising; time-of-arrival estimation; Cramer Rao lower bound; Monte Carlo simulations; adaptive direct position determination; low signal to noise ratios; passive localization systems; time differences of arrival; two step method; Delay effects; Delays; Estimation; Sensors; Signal processing; Vectors; Passive localization; adaptive direct position determination; direct position determination (DPD); time differences of arrival (TDOA);
Conference_Titel :
Signal and Information Processing (ChinaSIP), 2013 IEEE China Summit & International Conference on
Conference_Location :
Beijing
DOI :
10.1109/ChinaSIP.2013.6625334