Relay Precoder Optimization in MIMO-Relay Networks With Imperfect CSI

Handle URI:
http://hdl.handle.net/10754/594148
Title:
Relay Precoder Optimization in MIMO-Relay Networks With Imperfect CSI
Authors:
Pandarakkottilil, Ubaidulla; Chockalingam, A.
Abstract:
In this paper, we consider robust joint designs of relay precoder and destination receive filters in a nonregenerative multiple-input multiple-output (MIMO) relay network. The network consists of multiple source-destination node pairs assisted by a MIMO-relay node. The channel state information (CSI) available at the relay node is assumed to be imperfect. We consider robust designs for two models of CSI error. The first model is a stochastic error (SE) model, where the probability distribution of the CSI error is Gaussian. This model is applicable when the imperfect CSI is mainly due to errors in channel estimation. For this model, we propose robust minimum sum mean square error (SMSE), MSE-balancing, and relay transmit power minimizing precoder designs. The next model for the CSI error is a norm-bounded error (NBE) model, where the CSI error can be specified by an uncertainty set. This model is applicable when the CSI error is dominated by quantization errors. In this case, we adopt a worst-case design approach. For this model, we propose a robust precoder design that minimizes total relay transmit power under constraints on MSEs at the destination nodes. We show that the proposed robust design problems can be reformulated as convex optimization problems that can be solved efficiently using interior-point methods. We demonstrate the robust performance of the proposed design through simulations. © 2011 IEEE.
KAUST Department:
Physical Sciences and Engineering (PSE) Division
Citation:
Ubaidulla P, Chockalingam A (2011) Relay Precoder Optimization in MIMO-Relay Networks With Imperfect CSI. IEEE Trans Signal Process 59: 5473–5484. Available: http://dx.doi.org/10.1109/tsp.2011.2164401.
Publisher:
Institute of Electrical and Electronics Engineers (IEEE)
Journal:
IEEE Transactions on Signal Processing
Issue Date:
Nov-2011
DOI:
10.1109/tsp.2011.2164401
Type:
Article
ISSN:
1053-587X; 1941-0476
Sponsors:
This work in part was supported by Indo-French Centre for the Promotion of Advanced Research (IFCPAR) Project No. 4000-IT-1.
Appears in Collections:
Articles; Physical Sciences and Engineering (PSE) Division

Full metadata record

DC FieldValue Language
dc.contributor.authorPandarakkottilil, Ubaidullaen
dc.contributor.authorChockalingam, A.en
dc.date.accessioned2016-01-19T13:22:40Zen
dc.date.available2016-01-19T13:22:40Zen
dc.date.issued2011-11en
dc.identifier.citationUbaidulla P, Chockalingam A (2011) Relay Precoder Optimization in MIMO-Relay Networks With Imperfect CSI. IEEE Trans Signal Process 59: 5473–5484. Available: http://dx.doi.org/10.1109/tsp.2011.2164401.en
dc.identifier.issn1053-587Xen
dc.identifier.issn1941-0476en
dc.identifier.doi10.1109/tsp.2011.2164401en
dc.identifier.urihttp://hdl.handle.net/10754/594148en
dc.description.abstractIn this paper, we consider robust joint designs of relay precoder and destination receive filters in a nonregenerative multiple-input multiple-output (MIMO) relay network. The network consists of multiple source-destination node pairs assisted by a MIMO-relay node. The channel state information (CSI) available at the relay node is assumed to be imperfect. We consider robust designs for two models of CSI error. The first model is a stochastic error (SE) model, where the probability distribution of the CSI error is Gaussian. This model is applicable when the imperfect CSI is mainly due to errors in channel estimation. For this model, we propose robust minimum sum mean square error (SMSE), MSE-balancing, and relay transmit power minimizing precoder designs. The next model for the CSI error is a norm-bounded error (NBE) model, where the CSI error can be specified by an uncertainty set. This model is applicable when the CSI error is dominated by quantization errors. In this case, we adopt a worst-case design approach. For this model, we propose a robust precoder design that minimizes total relay transmit power under constraints on MSEs at the destination nodes. We show that the proposed robust design problems can be reformulated as convex optimization problems that can be solved efficiently using interior-point methods. We demonstrate the robust performance of the proposed design through simulations. © 2011 IEEE.en
dc.description.sponsorshipThis work in part was supported by Indo-French Centre for the Promotion of Advanced Research (IFCPAR) Project No. 4000-IT-1.en
dc.publisherInstitute of Electrical and Electronics Engineers (IEEE)en
dc.subjectImperfect CSIen
dc.subjectMIMO relayen
dc.subjectrelay precodingen
dc.subjectrobust optimizationen
dc.titleRelay Precoder Optimization in MIMO-Relay Networks With Imperfect CSIen
dc.typeArticleen
dc.contributor.departmentPhysical Sciences and Engineering (PSE) Divisionen
dc.identifier.journalIEEE Transactions on Signal Processingen
dc.contributor.institutionDepartment of Electrical Communication Engineering, Indian Institute of Science, Bangalore-560012, Indiaen
kaust.authorPandarakkottilil, Ubaidullaen
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