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Pre/Post-Rake Diversity Combining for UWB Communications in the Presence of Pulse Overlap

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2 Author(s)
Xiantao Cheng ; Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China (UESTC), Chengdu, China ; Yong Liang Guan

Taking the effect of pulse overlap into account, we address the pre/post-rake technique using rake structure at both transmitter and receiver. Firstly, we propose a single-stream (SS) pre/post-rake, in which the pair of pre-rake and post-rake weighting vectors is optimally derived through generalized eigenvalue decomposition (GEVD). Secondly, by judiciously designing multiple pairs of weighting vectors, we derive multiple-stream (MS) pre/post-rake, which enables parallel subchannel transmission while not requiring multiple antennas at the transmitter or receiver. Finally, we conduct simulations to verify the advantages of the SS pre/post-rake and the MS pre/post-rake over existing rakes.

Published in:

Wireless Communications, IEEE Transactions on  (Volume:11 ,  Issue: 2 )

Date of Publication:

February 2012

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