Frequency domain channel estimation for SC-FDE in UWB communications

Author

Wang, Yue ; Dong, Xiaodai

Author_Institution

Dept. of Electr. & Comput. Eng., Victoria Univ., BC

Volume

6

fYear

2005

fDate

2-2 Dec. 2005

Lastpage

3658

Abstract

Recently, single carrier block transmission with frequency domain equalization (SC-FDE) has been shown to be a promising candidate for ultra-wideband (UWB) communications. In this paper, we address the channel estimation problem for SC-FDE transmission over UWB channels. A mean square error (MSE) lower bound for the frequency domain LMMSE channel estimator is derived and the optimal pilot sequence that achieves this lower bound is obtained. Further simplification leads to a frequency domain channel estimator with reduced computational complexity. The performance of the simplified estimator for SC-FDE over UWB channels is evaluated and compared with that of perfect channel state information. The effects of non-optimal and optimal pilot symbols are also investigated. Our results show that the proposed frequency domain channel estimator performs well over UWB channels with only small performance degradation compared to the perfect channel estimation

Keywords

channel estimation; computational complexity; equalisers; least mean squares methods; ultra wideband communication; SC-FDE; UWB communications; computational complexity; frequency domain LMMSE channel estimator; frequency domain channel estimation; mean square error; ultra-wideband communications; Channel estimation; Channel state information; Computational complexity; Frequency domain analysis; Frequency estimation; Mean square error methods; Partial transmit sequences; State estimation; Ultra wideband communication; Ultra wideband technology;

fLanguage

English

Publisher

ieee

Conference_Titel

Global Telecommunications Conference, 2005. GLOBECOM '05. IEEE

Conference_Location

St. Louis, MO

Print_ISBN

0-7803-9414-3

Type

conf

DOI

10.1109/GLOCOM.2005.1578453

Filename

1578453