An interference-robust channel estimation method for MU-MIMO transmission in LTE-Advanced system

Author

Won Jun Hwang ; Jun Hee Jang ; Hyung Jin Choi

Author_Institution

Coll. of Inf. & Commun. Eng., Sungkyunkwan Univ., Suwon, South Korea

fYear

2013

fDate

2-5 July 2013

Firstpage

300

Lastpage

305

Abstract

To support a transparent multi-user multiple-input multiple output (MU-MIMO) transmission, the orthogonality between co-scheduled layers is not perfectly guaranteed in the long term evolution (LTE)-Advanced system. In this case, however, significant performance degradation in channel estimation can occur due to the interference from transmit signals for co-scheduled users. To overcome this problem, the proposed method partially estimates and eliminates the interference using simple matrix operations. After the partial interference cancellation, we apply a two-dimensional minimum mean squared error (2-D MMSE) channel estimation scheme with an adaptive weighting method considering the remaining interference and noise.

Keywords

Long Term Evolution; MIMO communication; channel estimation; interference suppression; least mean squares methods; LTE-advanced system; MU-MIMO transmission; adaptive weighting method; interference-robust channel estimation method; long term evolution-advanced system; matrix operations; partial interference cancellation; transparent multiuser multiple-input multiple output transmission; two-dimensional minimum mean squared error; Channel estimation; Channel models; Estimation; Interference; Long Term Evolution; Signal to noise ratio; Vectors; Channel estimation; minimum mean squared error (MMSE); multi-user interference (MUI); multi-user multiple-input multiple-output (MU-MIMO);

fLanguage

English

Publisher

ieee

Conference_Titel

Ubiquitous and Future Networks (ICUFN), 2013 Fifth International Conference on

Conference_Location

Da Nang

ISSN

2165-8528

Type

conf

DOI

10.1109/ICUFN.2013.6614830

Filename

6614830