Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO Coordination
<p/> <p>We consider a multicell multiple-input multiple-output (MIMO) coordinated downlink transmission, also known as network MIMO, under per-antenna power constraints. We investigate a simple multiuser zero-forcing (ZF) linear precoding technique known as block diagonalization (BD) for...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2011-01-01
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| Series: | EURASIP Journal on Wireless Communications and Networking |
| Online Access: | http://jwcn.eurasipjournals.com/content/2011/190461 |
| _version_ | 1818061919852953600 |
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| author | Kaviani Saeed Krzymień WitoldA |
| author_facet | Kaviani Saeed Krzymień WitoldA |
| author_sort | Kaviani Saeed |
| collection | DOAJ |
| description | <p/> <p>We consider a multicell multiple-input multiple-output (MIMO) coordinated downlink transmission, also known as network MIMO, under per-antenna power constraints. We investigate a simple multiuser zero-forcing (ZF) linear precoding technique known as block diagonalization (BD) for network MIMO. The optimal form of BD with per-antenna power constraints is proposed. It involves a novel approach of optimizing the precoding matrices over the entire null space of other users' transmissions. An iterative gradient descent method is derived by solving the dual of the throughput maximization problem, which finds the optimal precoding matrices globally and efficiently. The comprehensive simulations illustrate several network MIMO coordination advantages when the optimal BD scheme is used. Its achievable throughput is compared with the capacity region obtained through the recently established duality concept under per-antenna power constraints.</p> |
| first_indexed | 2024-12-10T13:55:58Z |
| format | Article |
| id | doaj.art-21873115ae31431699a2bbf94fa2d43c |
| institution | Directory Open Access Journal |
| issn | 1687-1472 1687-1499 |
| language | English |
| last_indexed | 2024-12-10T13:55:58Z |
| publishDate | 2011-01-01 |
| publisher | SpringerOpen |
| record_format | Article |
| series | EURASIP Journal on Wireless Communications and Networking |
| spelling | doaj.art-21873115ae31431699a2bbf94fa2d43c2022-12-22T01:45:59ZengSpringerOpenEURASIP Journal on Wireless Communications and Networking1687-14721687-14992011-01-0120111190461Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO CoordinationKaviani SaeedKrzymień WitoldA<p/> <p>We consider a multicell multiple-input multiple-output (MIMO) coordinated downlink transmission, also known as network MIMO, under per-antenna power constraints. We investigate a simple multiuser zero-forcing (ZF) linear precoding technique known as block diagonalization (BD) for network MIMO. The optimal form of BD with per-antenna power constraints is proposed. It involves a novel approach of optimizing the precoding matrices over the entire null space of other users' transmissions. An iterative gradient descent method is derived by solving the dual of the throughput maximization problem, which finds the optimal precoding matrices globally and efficiently. The comprehensive simulations illustrate several network MIMO coordination advantages when the optimal BD scheme is used. Its achievable throughput is compared with the capacity region obtained through the recently established duality concept under per-antenna power constraints.</p>http://jwcn.eurasipjournals.com/content/2011/190461 |
| spellingShingle | Kaviani Saeed Krzymień WitoldA Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO Coordination EURASIP Journal on Wireless Communications and Networking |
| title | Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO Coordination |
| title_full | Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO Coordination |
| title_fullStr | Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO Coordination |
| title_full_unstemmed | Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO Coordination |
| title_short | Optimal Multiuser Zero Forcing with Per-Antenna Power Constraints for Network MIMO Coordination |
| title_sort | optimal multiuser zero forcing with per antenna power constraints for network mimo coordination |
| url | http://jwcn.eurasipjournals.com/content/2011/190461 |
| work_keys_str_mv | AT kavianisaeed optimalmultiuserzeroforcingwithperantennapowerconstraintsfornetworkmimocoordination AT krzymie324witolda optimalmultiuserzeroforcingwithperantennapowerconstraintsfornetworkmimocoordination |