Adaptive Distributed Space-Time Coding Based on Adjustable Code Matrices for Cooperative MIMO Relaying Systems

An adaptive distributed space-time coding (DSTC) scheme is proposed for two-hop cooperative MIMO networks. Linear minimum mean square error (MMSE) receive filters and adjustable code matrices are considered subject to a power constraint with an amplify-and-forward (AF) cooperation strategy. In the p...

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Veröffentlicht in:IEEE transactions on communications Jg. 61; H. 7; S. 2692 - 2703
Hauptverfasser: Tong Peng, de Lamare, R. C., Schmeink, A.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.07.2013
Institute of Electrical and Electronics Engineers
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Schlagworte:
Access methods and protocols, osi model
Adaptive algorithms
Adjustable
Algorithm design and analysis
Algorithms
Applied sciences
Coding
Coding, codes
Computational complexity
cooperative systems
Detection, estimation, filtering, equalization, prediction
distributed space time codes
Encoding
Errors
Exact sciences and technology
Feedback
Information, signal and communications theory
Mean square errors
MIMO
Optimization
Relay
Relays
Signal and communications theory
Signal, noise
space-time codes with feedback
Studies
Telecommunications
Telecommunications and information theory
Teleprocessing networks. Isdn
Vectors
Relaying
Space-time codes
Relay
Error analysis
Error probability
distributed space time codes
Adaptive algorithm
Error estimation
Feedback regulation
Stochastic method
Adaptive method
Optimization
Mean square error
Least squares method
Routing protocols
MIMO system
Adaptive algorithms
Transmission protocol
Cooperative systems
Computational complexity
space-time codes with feedback
Upper bound
Algorithm performance
Simulation
Linear filter
ISSN:0090-6778, 1558-0857
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Zusammenfassung:An adaptive distributed space-time coding (DSTC) scheme is proposed for two-hop cooperative MIMO networks. Linear minimum mean square error (MMSE) receive filters and adjustable code matrices are considered subject to a power constraint with an amplify-and-forward (AF) cooperation strategy. In the proposed adaptive DSTC scheme, an adjustable code matrix obtained by a feedback channel is employed to transform the space-time coded matrix at the relay node. The effects of the limited feedback and the feedback errors are assessed. Linear MMSE expressions are devised to compute the parameters of the adjustable code matrix and the linear receive filters. Stochastic gradient (SG) and least-squares (LS) algorithms are also developed with reduced computational complexity. An upper bound on the pairwise error probability analysis is derived and indicates the advantage of employing the adjustable code matrices at the relay nodes. An alternative optimization algorithm for the adaptive DSTC scheme is also derived in order to eliminate the need for the feedback. The algorithm provides a fully distributed scheme for the adaptive DSTC at the relay node based on the minimization of the error probability. Simulation results show that the proposed algorithms obtain significant performance gains as compared to existing DSTC schemes.
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ISSN:0090-6778
1558-0857
DOI:10.1109/TCOMM.2013.043013.120788