Interference Alignment-based Precoding and User Selection with Limited Feedback in Two-cell Downlink Multi-user MIMO Systems
Interference alignment (IA) is a new approach to address interference in modern multiple-input multiple-out (MIMO) cellular networks in which interference is an important factor that limits the system throughput. System throughput in most IA implementation schemes is significantly improved only wi...
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| Format: | Article |
| Language: | English |
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Eastern Macedonia and Thrace Institute of Technology
2016-05-01
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| Series: | Journal of Engineering Science and Technology Review |
| Subjects: | |
| Online Access: | http://www.jestr.org/downloads/Volume9Issue2/fulltext19922016.pdf |
| _version_ | 1828377438950785024 |
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| author | Yin Zhu Yang Ou |
| author_facet | Yin Zhu Yang Ou |
| author_sort | Yin Zhu |
| collection | DOAJ |
| description | Interference alignment (IA) is a new approach to address interference in modern multiple-input multiple-out (MIMO)
cellular networks in which interference is an important factor that limits the system throughput. System throughput in
most IA implementation schemes is significantly improved only with perfect channel state information and in a high
signal-to-noise ratio (SNR) region. Designing a simple IA scheme for the system with limited feedback and investigating
system performance at a low-to-medium SNR region is important and practical. This paper proposed a precoding and
user selection scheme based on partial interference alignment in two-cell downlink multi-user MIMO systems under
limited feedback. This scheme aligned inter-cell interference to a predefined direction by designing user’s receive
antenna combining vectors. A modified singular value decomposition (SVD)-based beamforming method and a
corresponding user-selection algorithm were proposed for the system with low rate limited feedback to improve sum rate
performance. Simulation results show that the proposed scheme achieves a higher sum rate than traditional schemes
without IA. The modified SVD-based beamforming scheme is also superior to the traditional zero-forcing beamforming
scheme in low-rate limited feedback systems. The proposed partial IA scheme does not need to collaborate between
transmitters and joint design between the transmitter and the users. The scheme can be implemented with low feedback
overhead in current MIMO cellular networks. |
| first_indexed | 2024-04-14T08:12:35Z |
| format | Article |
| id | doaj.art-2b82a8d92d0949c5a39a1cd5b4ed72a7 |
| institution | Directory Open Access Journal |
| issn | 1791-2377 1791-2377 |
| language | English |
| last_indexed | 2024-04-14T08:12:35Z |
| publishDate | 2016-05-01 |
| publisher | Eastern Macedonia and Thrace Institute of Technology |
| record_format | Article |
| series | Journal of Engineering Science and Technology Review |
| spelling | doaj.art-2b82a8d92d0949c5a39a1cd5b4ed72a72022-12-22T02:04:29ZengEastern Macedonia and Thrace Institute of TechnologyJournal of Engineering Science and Technology Review1791-23771791-23772016-05-0192115120Interference Alignment-based Precoding and User Selection with Limited Feedback in Two-cell Downlink Multi-user MIMO SystemsYin Zhu0Yang Ou1Broadband Wireless Communication and Multimedia Laboratory, Tongji University, Shanghai 201804, China / School of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou 215009, ChinaSchool of Electronic and Information Engineering, Suzhou University of Science and Technology, Suzhou 215009, China / Department of Electrical and Computer Engineering, University of Toronto, Toronto, ON, M5S 3G4, CanadaInterference alignment (IA) is a new approach to address interference in modern multiple-input multiple-out (MIMO) cellular networks in which interference is an important factor that limits the system throughput. System throughput in most IA implementation schemes is significantly improved only with perfect channel state information and in a high signal-to-noise ratio (SNR) region. Designing a simple IA scheme for the system with limited feedback and investigating system performance at a low-to-medium SNR region is important and practical. This paper proposed a precoding and user selection scheme based on partial interference alignment in two-cell downlink multi-user MIMO systems under limited feedback. This scheme aligned inter-cell interference to a predefined direction by designing user’s receive antenna combining vectors. A modified singular value decomposition (SVD)-based beamforming method and a corresponding user-selection algorithm were proposed for the system with low rate limited feedback to improve sum rate performance. Simulation results show that the proposed scheme achieves a higher sum rate than traditional schemes without IA. The modified SVD-based beamforming scheme is also superior to the traditional zero-forcing beamforming scheme in low-rate limited feedback systems. The proposed partial IA scheme does not need to collaborate between transmitters and joint design between the transmitter and the users. The scheme can be implemented with low feedback overhead in current MIMO cellular networks.http://www.jestr.org/downloads/Volume9Issue2/fulltext19922016.pdfInterference alignmentLimited feedbackUser selectionZero-forcing beamforming |
| spellingShingle | Yin Zhu Yang Ou Interference Alignment-based Precoding and User Selection with Limited Feedback in Two-cell Downlink Multi-user MIMO Systems Journal of Engineering Science and Technology Review Interference alignment Limited feedback User selection Zero-forcing beamforming |
| title | Interference Alignment-based Precoding and User Selection with Limited Feedback in Two-cell Downlink Multi-user MIMO Systems |
| title_full | Interference Alignment-based Precoding and User Selection with Limited Feedback in Two-cell Downlink Multi-user MIMO Systems |
| title_fullStr | Interference Alignment-based Precoding and User Selection with Limited Feedback in Two-cell Downlink Multi-user MIMO Systems |
| title_full_unstemmed | Interference Alignment-based Precoding and User Selection with Limited Feedback in Two-cell Downlink Multi-user MIMO Systems |
| title_short | Interference Alignment-based Precoding and User Selection with Limited Feedback in Two-cell Downlink Multi-user MIMO Systems |
| title_sort | interference alignment based precoding and user selection with limited feedback in two cell downlink multi user mimo systems |
| topic | Interference alignment Limited feedback User selection Zero-forcing beamforming |
| url | http://www.jestr.org/downloads/Volume9Issue2/fulltext19922016.pdf |
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