Pilot Contamination Mitigation via a Novel Time-Shift Pilot Scheme in Large-Scale Multicell Multiuser MIMO Systems
Joint Authors
Luo, Zhangkai
Wang, Huali
Lv, Wanghan
Source
International Journal of Antennas and Propagation
Issue
Vol. 2016, Issue 2016 (31 Dec. 2016), pp.1-9, 9 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2016-12-01
Country of Publication
Egypt
No. of Pages
9
Main Subjects
Abstract EN
We propose a novel time-shift pilot scheme to mitigate the pilot contamination in large-scale multicell multiuser MIMO (LS-MIMO) systems.
In the proposed scheme, the length of the uplink training pilot sequence is equal to the cell number; that is to say, the same pilot sequence is used within a cell, while for different cells, pilot sequences are mutually orthogonal.
Moreover, users within a cell transmit the same pilot sequence in a time-shift manner during the channel estimation stage and in this way all user terminals’ channel state information can be estimated without contamination.
The asymptotic channel orthogonality is studied in the LS-MIMO system, with which the mutual interference among cells caused by data and pilot sequences can be cancelled with the successive interference cancellation (SIC) method.
We explore the superiority of the proposed scheme in channel coefficient estimation, uplink data detection, and downlink data transmission steps.
Theoretical analysis and simulation results demonstrate that the proposed time-shift pilot design can alleviate the pilot contamination problem and improve the performance of the considered system significantly compared with the popular orthogonal pilots.
American Psychological Association (APA)
Luo, Zhangkai& Wang, Huali& Lv, Wanghan. 2016. Pilot Contamination Mitigation via a Novel Time-Shift Pilot Scheme in Large-Scale Multicell Multiuser MIMO Systems. International Journal of Antennas and Propagation،Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1105267
Modern Language Association (MLA)
Luo, Zhangkai…[et al.]. Pilot Contamination Mitigation via a Novel Time-Shift Pilot Scheme in Large-Scale Multicell Multiuser MIMO Systems. International Journal of Antennas and Propagation No. 2016 (2016), pp.1-9.
https://search.emarefa.net/detail/BIM-1105267
American Medical Association (AMA)
Luo, Zhangkai& Wang, Huali& Lv, Wanghan. Pilot Contamination Mitigation via a Novel Time-Shift Pilot Scheme in Large-Scale Multicell Multiuser MIMO Systems. International Journal of Antennas and Propagation. 2016. Vol. 2016, no. 2016, pp.1-9.
https://search.emarefa.net/detail/BIM-1105267
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1105267