ICI mitigation by Doppler frequency shift estimation and pre-compensation in LTE-R systems

Author

Du, Qiu ; Wu, Gang ; Yu, Qiaoling ; Li, Shaoqian

Author_Institution

Nat. Key Lab. of Sci. & Technol. on Commun., Univ. of Electron. Sci. & Technol. of China, Chengdu, China

fYear

2012

fDate

15-17 Aug. 2012

Firstpage

469

Lastpage

474

Abstract

Inter-carrier interference (ICI) caused by high Doppler frequency shift has severe impact on link performance and capacity for High-Speed Railway (HSR) communications. In this paper we investigate the ICI mitigation scheme by utilizing the estimation and pre-compensation of high Doppler shifts in Long Term Evolution for Railway (LTE-R) systems with distributed remote radio units (RRU). We propose several schemes to estimate and mitigate ICI caused by Doppler frequency shifts. In addition, we propose to use cellular cyclic delay diversity (C-CDD) technique for mobile relay station (MRS) on the roof of HSR. Additional frequency diversity gain can be obtained when MRS lies within coverage area of two RRUs so that the communication quality is improved. The simulation results show that our proposed schemes can achieve the trade-off between complexity and performance.

Keywords

Doppler shift; Long Term Evolution; cellular radio; diversity reception; intercarrier interference; radio links; radiofrequency interference; railway communication; C-CDD technique; Doppler frequency shift estimation; HSR communication; ICI mitigation; LTE-R system; Long Term Evolution for railway; MRS; RRU; cellular cyclic delay diversity; communication quality; distributed remote radio unit; frequency diversity gain; high-speed railway communication; intercarrier interference; link performance; mobile relay station; precompensation; Delay; Doppler shift; Estimation; Frequency estimation; OFDM; Time frequency analysis; Doppler shift; High-Speed Railway; LTE-R; cellular cyclic delay diversity; pre-compensation;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications in China (ICCC), 2012 1st IEEE International Conference on

Conference_Location

Beijing

Print_ISBN

978-1-4673-2814-2

Electronic_ISBN

978-1-4673-2813-5

Type

conf

DOI

10.1109/ICCChina.2012.6356928

Filename

6356928