학술논문
EM-based joint time delay and channel estimation for cooperative communications
Document Type
Conference
Author
Source
2011 8th International Symposium on Wireless Communication Systems Wireless Communication Systems (ISWCS), 2011 8th International Symposium on. :91-95 Nov, 2011
Subject
Language
ISSN
2154-0217
2154-0225
2154-0225
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.