Optimal power control in MIMO systems with quantized feedback - [transactions papers]

We treat the problem of outage minimization via power control in MIMO systems with quantized feedback. We formulate the optimal quantized power control design for a general MIMO system and provide the numerical procedure for finding the optimal solution. Our results not only extend but also show the...

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Bibliographic Details
Published in:IEEE transactions on wireless communications 2008-12, Vol.7 (12), p.4859-4866
Main Authors: Khojastepour, M.A., Guosen Yue, Xiaodong Wang, Madihian, M.
Format: Article
Language:English
Subjects:
Applied sciences
Coding, codes
Error analysis
Exact sciences and technology
Fading
Feedback
Information, signal and communications theory
MIMO
MIMO systems
Modulation coding
Modulation, demodulation
Parity check codes
Power control
Power system modeling
Quadrature amplitude modulation
Signal and communications theory
Systems, networks and services of telecommunications
Telecommunications
Telecommunications and information theory
Transmission and modulation (techniques and equipments)
transmission technology
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Summary:We treat the problem of outage minimization via power control in MIMO systems with quantized feedback. We formulate the optimal quantized power control design for a general MIMO system and provide the numerical procedure for finding the optimal solution. Our results not only extend but also show the deficiency of the existing quantized power control schemes for MISO systems. We further propose a design based on the pre-evaluation of the packet error rate performance of practical MIMO systems employing short-length LDPC codes and QAM modulations and with possibly unreliable feedback links. It is demonstrated that with only a few bits of feedback, the resulting quantized power control strategy achieves considerable gain over a system without power control.
ISSN:1536-1276
1558-2248
DOI:10.1109/T-WC.2008.060911