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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Bibliographic Details
Published in:IEEE transactions on vehicular technology Vol. 61; no. 9; pp. 3958 - 3968
Main Authors: Mo, Ronghong, Chew, Yong Huat, Yuen, Chau
Format: Journal Article
Language:English
Published: New York, NY IEEE 01.11.2012
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects:
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
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
ISSN:0018-9545, 1939-9359
Online Access:Get full text
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Description
Summary: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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ISSN:0018-9545
1939-9359
DOI:10.1109/TVT.2012.2211051