Unitary and Non-Unitary Precoders for a Limited Feedback Precoded OSTBC System

In this paper, a multiple-input-multiple-output (MIMO) system with finite-bit feedback first proposed by Love-Heath is considered, where a transmitted signal consists of a precode followed by an orthogonal space-time block code (OSTBC), such as Alamouti code. A new design criterion and a correspondi...

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Veröffentlicht in:IEEE transactions on vehicular technology Jg. 62; H. 4; S. 1646 - 1654
Hauptverfasser: Wang, Haiquan, Li, Yabo, Xia, Xiang-Gen, Liu, Shunlan
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.05.2013
Institute of Electrical and Electronics Engineers
Schlagworte:
Algorithm design and analysis
Applied sciences
Circuit properties
Coding, codes
Design methodology
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Encoding
Exact sciences and technology
Finite-bit feedback
Indexes
Information, signal and communications theory
Manifolds
MIMO
multiple-input-multiple-output (MIMO) systems
orthogonal space-time block code (OSTBC)
precoders
Signal and communications theory
Signal convertors
Telecommunications and information theory
Vectors
Performance evaluation
MIMO system
Block code
Space-time codes
Design criterion
multiple-input―multiple-output (MIMO) systems
Feedback system
Coding circuit
Feedback regulation
orthogonal space―time block code (OSTBC)
Implementation
Feedback
Coding
precoders
System simulation
Finite-bit feedback
Fast algorithm
ISSN:0018-9545
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Beschreibung
Zusammenfassung:In this paper, a multiple-input-multiple-output (MIMO) system with finite-bit feedback first proposed by Love-Heath is considered, where a transmitted signal consists of a precode followed by an orthogonal space-time block code (OSTBC), such as Alamouti code. A new design criterion and a corresponding design method of precoders are proposed. Simulations show that the precoders obtained by our proposed criterion and method perform better than the existing ones. Furthermore, since our proposed precoders have a layered structure, their designs can be implemented in the simplest Grassmannian manifold. Moreover, a fast encoding algorithm can be applied, which can greatly reduce the complexity of codeword selection. In this paper, we also propose non-unitary precoders and their design criterion and method based on the performance analysis and the special property of an OSTBC. Interestingly, non-unitary precoders can significantly improve performance over unitary precoders.
ISSN:0018-9545
DOI:10.1109/TVT.2012.2233508