TAILIEUCHUNG - Báo cáo sinh học: " Research Article Iterative Frequency-Domain Channel Estimation and Equalization for Ultra-Wideband Systems with Short Cyclic Prefix"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí sinh học Journal of Biology đề tài: Research Article Iterative Frequency-Domain Channel Estimation and Equalization for Ultra-Wideband Systems with Short Cyclic Prefix | Hindawi Publishing Corporation EURASIP Journal on Advances in Signal Processing Volume 2010 Article ID 819591 9 pages doi 2010 819591 Research Article Iterative Frequency-Domain Channel Estimation and Equalization for Ultra-Wideband Systems with Short Cyclic Prefix Salim Bahceci and Mutlu Koca EURASIP Member Wireless Communications Laboratory Department of Electrical and Electronics Engineering Bogazici University Bebek 34342 Istanbul Turkey Correspondence should be addressed to Mutlu Koca Received 4 October 2009 Revised 5 March 2010 Accepted 9 June 2010 Academic Editor Cihan Tepedelenlioglu Copyright 2010 S. Bahceci and M. Koca. This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use distribution and reproduction in any medium provided the original work is properly cited. In impulse radio ultra-wideband IR-UWB systems where the channel lengths are on the order of a few hundred taps conventional use of frequency-domain FD processing for channel estimation and equalization may not be feasible because the need to add a cyclic prefix CP to each block causes a significant reduction in the spectral efficiency. On the other hand using no or short CP causes the interblock interference IBI and thus degradation in the receiver performance. Therefore in order to utilize FD receiver processing UWB systems without a significant loss in the spectral efficiency and the performance IBI cancellation mechanisms are needed in both the channel estimation and equalization operations. For this reason in this paper we consider the joint FD channel estimation and equalization for IR-UWB systems with short cyclic prefix CP and propose a novel iterative receiver employing soft IBI estimation and cancellation within both its FD channel estimator and FD equalizer components. We show by simulation results that the proposed FD receiver attains performances close to that of the full CP case in both .

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