Title :
Passive time delay estimation for complex noncircular signals
Author :
Fei Wen ; Qun Wan ; Yipeng Liu
Author_Institution :
Sch. of of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
This paper addresses the passive time delay estimation (TDE) issue for complex signals. First, we derive the maximum likelihood (ML) estimator for the white Gaussian complex signal model with uncorrelated circular noise whereas the source signal is not restricted to be circular. Then, we present another TDE method using only the conjugate cross-correlation (CCC) measure to deal better with correlated noise for noncircular signals. Moreover, the Cramer-Rao lower bound (CRLB) of passive TDE is generalized to circular complex signals.
Keywords :
Gaussian noise; correlation methods; delay estimation; maximum likelihood estimation; CCC measure; CRLB; Cramer-Rao lower bound; complex noncircular signals; conjugate cross-correlation measure; maximum likelihood estimator; passive TDE method; passive time delay estimation; source signal; uncorrelated circular noise; white Gaussian complex signal model; Delay effects; Maximum likelihood estimation; Signal to noise ratio; Speech; Speech processing; maximum likelihood; noncircular signal; time delay estimation (TDE);
Conference_Titel :
Electronics and Telecommunications (ISETC), 2012 10th International Symposium on
Conference_Location :
Timisoara
Print_ISBN :
978-1-4673-1177-9
DOI :
10.1109/ISETC.2012.6408052
