EM-based joint time delay and channel estimation for cooperative communications

Author

Ak, Serkan ; Odabasioglu, Niyazi ; Uysal, Murat

Author_Institution

Dept. of Electr. & Electron. Eng., Istanbul Univ., Istanbul, Turkey

fYear

2011

fDate

6-9 Nov. 2011

Firstpage

91

Lastpage

95

Abstract

In this paper, we study joint time delay and channel estimation for a cooperative communication system with amplify-and-forward (AF) relaying. The proposed joint estimator is based on Expectation-Maximization (EM) algorithm and presents a low-complexity solution for iterative maximum likelihood (ML) estimation. Our simulation results demonstrate that the performance of proposed cooperative system lies within 0.5dB of the genie bound (i.e., perfect knowledge of time delays and fading coefficients) at a target bit error rate of 10^-4 assuming the deployment of 4 pilot symbols and 3 iterations.

Keywords

amplify and forward communication; channel estimation; cooperative communication; delays; error statistics; expectation-maximisation algorithm; iterative methods; EM-based joint time delay; amplify-and-forward relaying; channel estimation; cooperative communication system; expectation-maximization algorithm; iterative maximum likelihood estimation; joint estimator; low complexity solution; pilot symbol; target bit error rate; Bit error rate; Channel estimation; Delay effects; Fading; Joints; Relays; Timing; Channel estimation; cooperative communications; expectation-maximization algorithm; time synchronization;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communication Systems (ISWCS), 2011 8th International Symposium on

Conference_Location

Aachen

ISSN

2154-0217

Print_ISBN

978-1-61284-403-9

Electronic_ISBN

2154-0217

Type

conf

DOI

10.1109/ISWCS.2011.6125316

Filename

6125316