caa a22 4500 60620542X CHVBK 20210128101007.0 cr unu---uuuuu 210128e20151201xx s 000 0 eng 10.1007/s00034-015-0037-1 doi (NATIONALLICENCE)springer-10.1007/s00034-015-0037-1 Passive Multipath Time Delay Estimation Using MCMC Methods [Elektronische Daten] [Jing Li, Jiandong Zhu, Zhihong Feng, Yongjun Zhao, Donghai Li] Passive time delay estimation in multipath environments is studied in this paper. A novel restrained maximum likelihood (ML) estimator is proposed to estimate the multiple time delays. Unlike traditional ML function which has P global maximum values, restraint conditions limit the ML function of P paths time delays signal with only one global maximum value. Markov chain Monte Carlo (MCMC) algorithm is used to find the global maximum of the restrained likelihood function to avoid traditional complex multidimensional grid search, initialization-dependent iterative methods or methods using interpolation to enhance performance. Indeed, MCMC sampling technique for ML function has a lower computational complexity than importance sampling (IS), which needs to compute the required realizations before sampling. Furthermore, Cramer-Rao lower bound of this model is derived. Finally, simulations results and theoretical analysis demonstrate that MCMC-based approach has the same performance as IS-based algorithm and the lower computational complexity than IS-based technique. The Author(s), 2015 Time delay estimation nationallicence Markov chain Monte Carlo method nationallicence Maximum likelihood estimation nationallicence Passive radar nationallicence Multipath propagation nationallicence CRLB nationallicence Li Jing Zhengzhou Information Science and Technology Institute, 450001, Zhengzhou, China aut Zhu Jiandong Electronic Equipment Test Center, 471003, Luoyang, China aut Feng Zhihong Zhengzhou Information Science and Technology Institute, 450001, Zhengzhou, China aut Zhao Yongjun Zhengzhou Information Science and Technology Institute, 450001, Zhengzhou, China aut Li Donghai Zhengzhou Information Science and Technology Institute, 450001, Zhengzhou, China aut Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/12(2015-12-01), 3897-3913 0278-081X 34:12<3897 2015 34 34 https://doi.org/10.1007/s00034-015-0037-1 text/html Onlinezugriff via DOI BK010053 XK010053 XK010000 Metadata rights reserved Springer special CC-BY-NC licence nationallicence 1 research-article jats NATIONALLICENCE NATIONALLICENCE NL-springer NATIONALLICENCE 856 40 https://doi.org/10.1007/s00034-015-0037-1 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Li Jing Zhengzhou Information Science and Technology Institute, 450001, Zhengzhou, China aut NATIONALLICENCE 700 1- Zhu Jiandong Electronic Equipment Test Center, 471003, Luoyang, China aut NATIONALLICENCE 700 1- Feng Zhihong Zhengzhou Information Science and Technology Institute, 450001, Zhengzhou, China aut NATIONALLICENCE 700 1- Zhao Yongjun Zhengzhou Information Science and Technology Institute, 450001, Zhengzhou, China aut NATIONALLICENCE 700 1- Li Donghai Zhengzhou Information Science and Technology Institute, 450001, Zhengzhou, China aut NATIONALLICENCE 773 0- Circuits, Systems, and Signal Processing Springer US; http://www.springer-ny.com 34/12(2015-12-01), 3897-3913 0278-081X 34:12<3897 2015 34 34