Information Rate and Relay Precoder Design for Amplify-and-Forward MIMO Relay Networks With Imperfect Channel State Information
This paper investigates achievable information rate and relay precoder design of multiple-input-multiple-output (MIMO) amplify-and-forward (AF) relay networks under imperfect channel state information (CSI) including channel estimation (CE) errors and feedback/feedforward (FB/FF) delay errors, witho...
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| Veröffentlicht in: | IEEE transactions on vehicular technology Jg. 61; H. 9; S. 3958 - 3968 |
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| Hauptverfasser: | , , |
| Format: | Journal Article |
| Sprache: | Englisch |
| Veröffentlicht: |
New York, NY
IEEE
01.11.2012
Institute of Electrical and Electronics Engineers The Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
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| ISSN: | 0018-9545, 1939-9359 |
| Online-Zugang: | Volltext |
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| Abstract | This paper investigates achievable information rate and relay precoder design of multiple-input-multiple-output (MIMO) amplify-and-forward (AF) relay networks under imperfect channel state information (CSI) including channel estimation (CE) errors and feedback/feedforward (FB/FF) delay errors, without considering the direct link from source to destination. For the first time, we derive the achievable information rate of AF MIMO relay networks under imperfect CSI for two scenarios: In the first scenario, both the source-relay (S-R) and relay-destination (R-D) links are estimated at the destination, whereas in the second scenario, the S-R link is estimated at the relay, and the R-D link is estimated at the destination. We then design a relay precoder that maximizes the approximate achievable information rate, given the average relay power constraint. Numerical results show that Scenario I achieves better average information rate than Scenario II. It is also observed that the accuracy of the CE of the S-R link is more important than that of the R-D link. Finally, the proposed relay precoder can achieve an average achievable information rate higher than the conventional fixed gain relaying scheme, and higher than a relay precoder design treating the estimated CSI as perfect CSI at higher CE and FB/FF delay errors. |
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| AbstractList | This paper investigates achievable information rate and relay precoder design of multiple-input-multiple-output (MIMO) amplify-and-forward (AF) relay networks under imperfect channel state information (CSI) including channel estimation (CE) errors and feedback/feedforward (FB/FF) delay errors, without considering the direct link from source to destination. For the first time, we derive the achievable information rate of AF MIMO relay networks under imperfect CSI for two scenarios: In the first scenario, both the source-relay (S-R) and relay-destination (R-D) links are estimated at the destination, whereas in the second scenario, the S-R link is estimated at the relay, and the R-D link is estimated at the destination. We then design a relay precoder that maximizes the approximate achievable information rate, given the average relay power constraint. Numerical results show that Scenario I achieves better average information rate than Scenario II. It is also observed that the accuracy of the CE of the S-R link is more important than that of the R-D link. Finally, the proposed relay precoder can achieve an average achievable information rate higher than the conventional fixed gain relaying scheme, and higher than a relay precoder design treating the estimated CSI as perfect CSI at higher CE and FB/FF delay errors. |
| Author | Ronghong Mo Yong Huat Chew Chau Yuen |
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| Keywords | Relaying Parameter estimation Relay Relay network Current source converter Information rate Feedback regulation Research and development Accuracy Amplify-and-forward (AF) multiple-input-multiple-output (MIMO) relay Feedback Channel estimation Routing protocols Delay time Feedforward MIMO system Estimation error channel estimation (CE) errors Coding circuit Transmission protocol imperfect channel state information (CSI) Information transmission feedback/feedforward (FB/FF) errors Numerical simulation Gain |
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| SubjectTerms | Access methods and protocols, osi model Amplification Amplify-and-forward (AF) multiple-input-multiple-output (MIMO) relay Applied sciences Approximation Channel estimation channel estimation (CE) errors Channels Circuit properties Connection and protection apparatus Covariance matrix Delay Electric, optical and optoelectronic circuits Electrical engineering. Electrical power engineering Electronic circuits Electronics Error analysis Exact sciences and technology feedback/feedforward (FB/FF) errors Frame relay imperfect channel state information (CSI) information rate Information rates Links MIMO Relay Relay networks Relays Service level agreements Signal convertors Systems, networks and services of telecommunications Telecommunications Telecommunications and information theory Teleprocessing networks. Isdn Transmission and modulation (techniques and equipments) Vectors |
| Title | Information Rate and Relay Precoder Design for Amplify-and-Forward MIMO Relay Networks With Imperfect Channel State Information |
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