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

fYear

2012

fDate

15-16 Nov. 2012

Firstpage

243

Lastpage

246

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);

fLanguage

English

Publisher

ieee

Conference_Titel

Electronics and Telecommunications (ISETC), 2012 10th International Symposium on

Conference_Location

Timisoara

Print_ISBN

978-1-4673-1177-9

Type

conf

DOI

10.1109/ISETC.2012.6408052

Filename

6408052