Paper Info
Title
Performance analysis of multicell massive MIMO THP with pilot contamination
Abstract
AbstractAbstractPilot contamination (PC) is a performance limiting factor in multicell massive multiple‐input–multiple‐output systems. The PC may cause the channel estimation of users in the desired cell to be polluted with the channels of users with the same set of pilots in the adjacent cells. In this paper, we propose a multicell Tomlinson‐Harashima precoding (MC‐THP) to mitigate PC. The MC‐THP matrices are derived by the optimization function in which the errors seen by the users in the desired cell and the interference seen by the users in the neighboring cells are jointly minimized. In addition, the robust MC‐THP design with imperfect channel state information is investigated based on the covariance matrices of the channel estimation errors of the desired and interfering channels. Finally, an approximate analytical closed‐form of symbol error rate is obtained through the analysis of error covariance matrix in the desired cell. This is then used for power loading technique to improve the performance of the proposed MC‐THP. The simulation results confirm the improvement of the proposed MC‐THP concerning the conventional linear multicell minimum mean‐square error (MC‐MMSE) precoder. View Figure In this paper, multicell Tomlinson‐Harashima precoding (MC‐THP) is proposed to mitigate pilot contamination in multicell massive MIMO TDD systems. We detail the design of the robust MC‐THP scheme. An approximate closed‐form expression for SER is obtained followed by power loading technique to improve the performance of the proposed MC‐THP. The proposed precoder shows significant improvement compared to that of the multicell MMSE precoding in terms of increasing the number of users, serving antennas, and higher‐order modulation.
Year
DOI
Venue
2019
10.1002/ett.3574
Periodicals
Field
DocType
Volume
Computer science,MIMO,Electronic engineering,Contamination
Journal
30
Issue
ISSN
Citations 
5
2161-3915
0
PageRank 
References 
Authors
0.34
15
2
Name
Order
Citations
PageRank
Saiedeh Maboud Sanaie100.34
H. Khaleghi Bizaki2184.27