TY - GEN
T1 - A robust approach to channel estimation and detection for multicarrier systems
AU - Amleh, Khaled
AU - Li, Hongbin
PY - 2008
Y1 - 2008
N2 - Block transmission techniques have received much research interest recently for their ability to eliminate the inter-symbol interference problem associated with continuous transmission. Numerous detection schemes for single carrier and multi-carrier have been proposed. While these schemes may be derived from different principles, they usually rely on some prior estimate of the channel. However, channel estimation is usually affected by errors and most of existing detection schemes are known to be sensitive to such errors. In this paper, we develop a robust detection scheme that explicitly accounts for channel estimation error by optimizing the worst-case performance over a properly selected bounded uncertainty set. Although the prior channel estimation error is generally not bounded, we show that it is beneficial to refine the channel estimate over a properly chosen bounded uncertainty set of the channel centered on the prior channel estimate. Numerical results show an improved performance using the proposed robust approach over the one that ignores the prior estimation errors.
AB - Block transmission techniques have received much research interest recently for their ability to eliminate the inter-symbol interference problem associated with continuous transmission. Numerous detection schemes for single carrier and multi-carrier have been proposed. While these schemes may be derived from different principles, they usually rely on some prior estimate of the channel. However, channel estimation is usually affected by errors and most of existing detection schemes are known to be sensitive to such errors. In this paper, we develop a robust detection scheme that explicitly accounts for channel estimation error by optimizing the worst-case performance over a properly selected bounded uncertainty set. Although the prior channel estimation error is generally not bounded, we show that it is beneficial to refine the channel estimate over a properly chosen bounded uncertainty set of the channel centered on the prior channel estimate. Numerical results show an improved performance using the proposed robust approach over the one that ignores the prior estimation errors.
UR - http://www.scopus.com/inward/record.url?scp=51249096058&partnerID=8YFLogxK
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U2 - 10.1109/ICC.2008.109
DO - 10.1109/ICC.2008.109
M3 - Conference contribution
AN - SCOPUS:51249096058
SN - 9781424420742
T3 - IEEE International Conference on Communications
SP - 553
EP - 557
BT - ICC 2008 - IEEE International Conference on Communications, Proceedings
T2 - IEEE International Conference on Communications, ICC 2008
Y2 - 19 May 2008 through 23 May 2008
ER -