A worst-case robust MMSE transceiver design for nonregenerative MIMO relaying
Transceiver designs have been a key issue in guaranteeing the performance of multiple-input multiple-output (MIMO) relay systems, which are, however, often subject to imperfect channel state information (CSI). In this paper, we aim to design a robust MIMO transceiver for nonregenerative MIMO relay s...
| Main Authors: | , , , , |
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| Format: | Journal Article |
| Published: |
IEEE
2014
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| Subjects: | |
| Online Access: | http://hdl.handle.net/20.500.11937/13269 |
| _version_ | 1848748302373224448 |
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| author | Shen, H. Wang, J. Xu, W. Rong, Yue Zhao, C. |
| author_facet | Shen, H. Wang, J. Xu, W. Rong, Yue Zhao, C. |
| author_sort | Shen, H. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | Transceiver designs have been a key issue in guaranteeing the performance of multiple-input multiple-output (MIMO) relay systems, which are, however, often subject to imperfect channel state information (CSI). In this paper, we aim to design a robust MIMO transceiver for nonregenerative MIMO relay systems against imperfect CSI from a worst-case robust perspective. Specifically, we formulate the robust transceiver design, under the minimum mean-squared error (MMSE) criterion, as a minimax problem. Then, by decomposing the minimax problem into two subproblems with respect to the relay precoder and destination equalizer, respectively, we show that the optimal solution to each subproblem has a favorable channel-diagonalizing structure under some mild conditions. Based on this finding, we transform the two complex-matrix subproblems into their equivalent scalar forms, both of which are proven to be convex and can be efficiently solved by our proposed methods. We further propose an alternating algorithm to jointly optimize the precoder and equalizer that only requires scalar operations. Finally, the effectiveness of the proposed robust design is verified by simulation results. |
| first_indexed | 2025-11-14T07:02:53Z |
| format | Journal Article |
| id | curtin-20.500.11937-13269 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:02:53Z |
| publishDate | 2014 |
| publisher | IEEE |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-132692017-09-13T14:58:45Z A worst-case robust MMSE transceiver design for nonregenerative MIMO relaying Shen, H. Wang, J. Xu, W. Rong, Yue Zhao, C. imperfect channel state information (CSI) Multiple-input multiple-output (MIMO) relay systems worst-case transceiver design minimum mean-squared error (MMSE) Transceiver designs have been a key issue in guaranteeing the performance of multiple-input multiple-output (MIMO) relay systems, which are, however, often subject to imperfect channel state information (CSI). In this paper, we aim to design a robust MIMO transceiver for nonregenerative MIMO relay systems against imperfect CSI from a worst-case robust perspective. Specifically, we formulate the robust transceiver design, under the minimum mean-squared error (MMSE) criterion, as a minimax problem. Then, by decomposing the minimax problem into two subproblems with respect to the relay precoder and destination equalizer, respectively, we show that the optimal solution to each subproblem has a favorable channel-diagonalizing structure under some mild conditions. Based on this finding, we transform the two complex-matrix subproblems into their equivalent scalar forms, both of which are proven to be convex and can be efficiently solved by our proposed methods. We further propose an alternating algorithm to jointly optimize the precoder and equalizer that only requires scalar operations. Finally, the effectiveness of the proposed robust design is verified by simulation results. 2014 Journal Article http://hdl.handle.net/20.500.11937/13269 10.1109/TWC.2013.120413.130009 IEEE fulltext |
| spellingShingle | imperfect channel state information (CSI) Multiple-input multiple-output (MIMO) relay systems worst-case transceiver design minimum mean-squared error (MMSE) Shen, H. Wang, J. Xu, W. Rong, Yue Zhao, C. A worst-case robust MMSE transceiver design for nonregenerative MIMO relaying |
| title | A worst-case robust MMSE transceiver design for nonregenerative MIMO relaying |
| title_full | A worst-case robust MMSE transceiver design for nonregenerative MIMO relaying |
| title_fullStr | A worst-case robust MMSE transceiver design for nonregenerative MIMO relaying |
| title_full_unstemmed | A worst-case robust MMSE transceiver design for nonregenerative MIMO relaying |
| title_short | A worst-case robust MMSE transceiver design for nonregenerative MIMO relaying |
| title_sort | worst-case robust mmse transceiver design for nonregenerative mimo relaying |
| topic | imperfect channel state information (CSI) Multiple-input multiple-output (MIMO) relay systems worst-case transceiver design minimum mean-squared error (MMSE) |
| url | http://hdl.handle.net/20.500.11937/13269 |