Pilot Signal Power Allocation Design for Uplink Precoded Universal-Filtered Multi-Carrier System
Date Issued
2015
Date
2015
Author(s)
Wu, Lin-Chi
Abstract
In this thesis, we study the minimum mean square error(MMSE) channel estimation algorithm and design the pilot signal power allocation to reduce channel estimation error in precoded universal-filtered multi-carrier (UFMC) system. UFMC system is a multi-carrier transmission scheme to overcome the problem of inter-carrier interference (ICI) in orthogonal frequency division multiplexing (OFDM) systems. In UFMC scheme, a filtering operation is applied to a group of consecutive subcarriers in order to reduce out-of-band sidelobe levels and subsequently minimize the potential ICI between adjacent users in case of asynchronous transmissions. Despite the fact that UFMC have better performance than OFDM in carrier frequency offset environment, UFMC have lengthen channel taps because of the filter. Based on this properity, we propose a method about pilot signal power allocation to reduce channel estimation error in precoded UFMC system. And simulation result shows that the pilot signal power allocation we proposed really reduce the channel estimation error.
Subjects
Universal-Filtered Multi-Carrier
OFDM
Minimum Mean Square Error Channel Estimation Algorithm
Parks–McClellan Filter Design Algorithm
Dolph-Chebyshev Window
Type
thesis
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