Optimal Throughput-Diversity-Delay Tradeoff in MIMO ARQ Block-Fading Channels

In this paper, we consider an automatic-repeat-request (ARQ) retransmission protocol signaling over a block-fading multiple-input-multiple-output (MIMO) channel. Unlike previous work, we allow for multiple fading blocks within each transmission (ARQ round), and we constrain the transmitter to fixed...

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Veröffentlicht in:IEEE transactions on information theory Jg. 54; H. 9; S. 3968 - 3986
Hauptverfasser: Chuang, A., Guillen i Fabregas, A., Rasmussen, L.K., Collings, I.B.
Format: Journal Article
Sprache:Englisch
Veröffentlicht: New York, NY IEEE 01.09.2008
Institute of Electrical and Electronics Engineers
Schlagworte:
Alphabets
Applied sciences
Australia
Automatic repeat request
Automatic-repeat-request (ARQ) retransmission protocols
Block-fading channels
Blocking
Channels
Complex signal constellations
Constellation diagram
Exact sciences and technology
Exponents
Fading
Gain
Incremental redundancy coding
Information theory
Information, signal and communications theory
Lakes
Mathematical models
MIMO
Multiple-input-multiple output (MIMO) channels
OFDM
Optimization
Protocols
Radiocommunications
Signal to noise ratio
Switching and signalling
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Throughput-diversity-delay tradeoff
Transmission and modulation (techniques and equipments)
Transmitters. Receivers
Alphabet
Input signal
throughput-diversity-delay tradeoff
Wireless telecommunication
Information rate
Transmitter
incremental redundancy coding
block-fading channels
Coding
Delay time
multiple-input-multiple output (MIMO) channels
Fading channels
Fading
MIMO system
Redundancy
Complex signal
Automatic-repeat-request (ARQ) retransmission protocols
Signalling
complex signal constellations
Information transmission
Telecommunication system
Orthogonal frequency division multiplexing
Numerical simulation
Automatic repeat request
Signal to noise ratio
ISSN:0018-9448, 1557-9654
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Zusammenfassung:In this paper, we consider an automatic-repeat-request (ARQ) retransmission protocol signaling over a block-fading multiple-input-multiple-output (MIMO) channel. Unlike previous work, we allow for multiple fading blocks within each transmission (ARQ round), and we constrain the transmitter to fixed rate codes constructed over complex signal constellations. In particular, we examine the general case of average input-power-constrained con stellations with a fixed signaling alphabet of finite cardinality. This scenario is a suitable model for practical wireless communications systems employing orthogonal frequency division multiplexing (OFDM) techniques over a MIMO ARQ channel. Two cases of fading dynamics are considered, namely, short-term static fading where channel fading gains change randomly for each ARQ round, and long-term static fading where channel fading gains remain constant over all ARQ rounds pertaining to a given message. As our main result, we prove that for the block-fading MIMO ARQ channel with a fixed signaling alphabet satisfying a short-term power constraint, the optimal signal-to-noise ratio (SNR) exponent is given by a modified Singleton bound, relating all the system parameters. To demonstrate the practical significance of the theoretical analysis, we present numerical results showing that practical Singleton-bound-achieving maximum distance separable codes achieve the optimal SNR exponent.
Bibliographie:ObjectType-Article-2
SourceType-Scholarly Journals-1
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ISSN:0018-9448
1557-9654
DOI:10.1109/TIT.2008.928264