Analysis of an adaptive algorithm for unbiased multipath time delay estimation

Author

So, H.C.

Author_Institution

Dept. of Comput. Eng. & Inf. Technol., City Univ. of Hong Kong, Kowloon, China

Volume

39

Issue

3

fYear

2003

fDate

7/1/2003 12:00:00 AM

Firstpage

777

Lastpage

785

Abstract

The multipath equalization time delay estimator (METDE) provides an adaptive approach for estimating the difference in arrival times of a signal received at spatially separated sensors as well as the multipath channel characteristics. However, the parameter estimates of the METDE are biased in the presence of noise. The METDE algorithm is improved for unbiased parameter estimation via minimizing a modified cost function. Convergence behaviors and variances of the system variables of the amended method are derived. Computer simulations are included to corroborate the theoretical analysis and to evaluate the adaptive multipath delay estimation performance of the proposed algorithm.

Keywords

adaptive estimation; adaptive signal detection; delay estimation; multipath channels; parameter estimation; METDE; adaptive algorithm; adaptive approach; amended method; arrival times; convergence behaviors; delay estimation performance; modified cost function; multipath channel characteristics; multipath equalization time delay estimator; parameter estimates; spatially separated sensors; system variables; unbiased multipath time delay estimation; Adaptive algorithm; Adaptive equalizers; Algorithm design and analysis; Convergence; Cost function; Delay effects; Delay estimation; Multipath channels; Parameter estimation; Sensor phenomena and characterization;

fLanguage

English

Journal_Title

Aerospace and Electronic Systems, IEEE Transactions on

Publisher

ieee

ISSN

0018-9251

Type

jour

DOI

10.1109/TAES.2003.1238735

Filename

1238735