Multi-User Channel Estimation for Interference Mitigation in the LTE-Advanced Uplink

Author

Rong, Zhijun ; Fettweis, Gerhard

Author_Institution

Dept. of Mobile Commun. Syst., Tech. Univ. Dresden, Dresden, Germany

fYear

2010

fDate

6-9 Sept. 2010

Firstpage

1

Lastpage

5

Abstract

We discuss a novel pilot design for multi-user channel estimation in the OFDM uplink with localized block-type pilot placement. Due to this placement, multiple users´ channels interfere with each other. By analyzing the properties of this multi-user interference, a criterium of choosing an appropriate DFT phase shift in frequency domain is derived. With this optimized shift, the multi-user interference can be mitigated to improve the channel estimation performance significantly. Both analytical and simulative results confirm that the Mean Square Error (MSE) performance of the proposed channel estimation scheme is close to the upper bound of the single-user case.

Keywords

OFDM modulation; channel estimation; interference suppression; mean square error methods; multiuser channels; LTE-advanced uplink; OFDM uplink; interference mitigation; localized block-type pilot placement; mean square error; multi-user channel estimation; Channel estimation; Estimation; Frequency domain analysis; Interference; OFDM; Signal to noise ratio; Time domain analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference Fall (VTC 2010-Fall), 2010 IEEE 72nd

Conference_Location

Ottawa, ON

ISSN

1090-3038

Print_ISBN

978-1-4244-3573-9

Electronic_ISBN

1090-3038

Type

conf

DOI

10.1109/VETECF.2010.5594199

Filename

5594199