Iterative Equalization and Interference Alignment for Multiuser MIMO HetNets with Imperfect CSI
Joint Authors
Dinis, R.
Silva, Adão
Gameiro, Atílio
Castanheira, Daniel
Aido, Jorge
Magueta, Roberto
Source
Issue
Vol. 2015, Issue 2015 (31 Dec. 2015), pp.1-8, 8 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2015-12-29
Country of Publication
Egypt
No. of Pages
8
Main Subjects
Telecommunications Engineering
Abstract EN
In this paper we consider a scenario, where several small-cells work under the same coverage area and spectrum of a macrocell.
The signals stemming from the small-cell (macrocell) users if not carefully dealt with will generate harmful interference into the macrocell (small-cell).
To tackle this problem interference alignment and iterative equalization techniques are considered.
By using IA all interference generated by the small-cell (macrocell) users is aligned along a low dimensional subspace, at the macrocell (small-cells).
This reduces considerably the amount of resources allocated, to enable the coexistence of the two systems.
However, perfect IA requires the availability of error-free channel state information (CSI) at the transmitters.
Due to CSI errors one can have substantial performance degradation due to imperfect alignments.
Since in this work the IA precoders are based on imperfect CSI, an efficient iterative space-frequency equalization is designed at the receiver side to cope with the residual aligned interference.
The results demonstrate that iterative equalization is robust to imperfect CSI and removes efficiently the interference generated by the poorly aligned interference.
Close to matched filter bound performance is achieved, with a very few number of iterations.
American Psychological Association (APA)
Castanheira, Daniel& Aido, Jorge& Magueta, Roberto& Silva, Adão& Gameiro, Atílio& Dinis, R.. 2015. Iterative Equalization and Interference Alignment for Multiuser MIMO HetNets with Imperfect CSI. Mobile Information Systems،Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1072758
Modern Language Association (MLA)
Castanheira, Daniel…[et al.]. Iterative Equalization and Interference Alignment for Multiuser MIMO HetNets with Imperfect CSI. Mobile Information Systems No. 2015 (2015), pp.1-8.
https://search.emarefa.net/detail/BIM-1072758
American Medical Association (AMA)
Castanheira, Daniel& Aido, Jorge& Magueta, Roberto& Silva, Adão& Gameiro, Atílio& Dinis, R.. Iterative Equalization and Interference Alignment for Multiuser MIMO HetNets with Imperfect CSI. Mobile Information Systems. 2015. Vol. 2015, no. 2015, pp.1-8.
https://search.emarefa.net/detail/BIM-1072758
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-1072758