Please use this identifier to cite or link to this item:
|Title:||A robust maximum likelihood channel estimator for OFDM systems|
|Citation:||Zhongjun, W., Mathew, G., Yan, X., Tomisawa, M. (2007). A robust maximum likelihood channel estimator for OFDM systems. IEEE Wireless Communications and Networking Conference, WCNC : 169-174. ScholarBank@NUS Repository. https://doi.org/10.1109/WCNC.2007.37|
|Abstract:||Application of existing maximum likelihood channel estimation (MLE) in orthogonal frequency division multiplexing (OFDM) systems requires knowledge of the effective length of channel impulse response (ELCIR) for achieving optimum performance. Our analysis shows that the mean-squared error (MSE) is linearly related to ELCIR. Tracking the variation in ELCIR is thus very important for conventional MLE. But, incorporating a run-time update of ELCIR into the ML estimator turns out to be computationally expensive. Therefore, a modified ML channel estimator, which combines the ML estimation with a frequency-domain smoothing technique, is proposed. The proposed method introduces no extra complexity, and its performance has been proved using theoretical analysis and simulations to be robust to variation in ELCIR. Numerical results are provided to show the effectiveness of the proposed estimator under time-invariant and time-variant channel conditions. © 2007 IEEE.|
|Source Title:||IEEE Wireless Communications and Networking Conference, WCNC|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on Jul 9, 2018
WEB OF SCIENCETM
checked on Jun 20, 2018
checked on Jul 6, 2018
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.