Peak-to-average power ratio and power efficiency considerations in MIMO-OFDM systems

Peak-to-average power ratio (PAR) reduction is a powerful tool that can increase power efficiency and reduce distortion noise in MIMO-OFDM systems. Various PAR metrics have been used in the MIMO-OFDM literature without justifications regarding the physical mechanisms that support those PAR definitio...

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Bibliographic Details
Published in:IEEE communications letters 2008-04, Vol.12 (4), p.268-270
Main Authors: Chunming Zhao, Baxley, R.J., Zhou, G.T.
Format: Article
Language:English
Subjects:
Applied sciences
Bit error rate
Detection, estimation, filtering, equalization, prediction
Distortion
Exact sciences and technology
Frequency-selective fading channels
High power amplifiers
Information, signal and communications theory
MIMO
Miscellaneous
Multiplexing
Noise
Noise reduction
OFDM
Optimization methods
Orthogonal Frequency Division Multiplexing
Partial transmit sequences
Peak to average power ratio
Power efficiency
Reduction
Scaling factors
Signal and communications theory
Signal processing
Signal to noise ratio
Signal, noise
Telecommunications and information theory
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Summary:Peak-to-average power ratio (PAR) reduction is a powerful tool that can increase power efficiency and reduce distortion noise in MIMO-OFDM systems. Various PAR metrics have been used in the MIMO-OFDM literature without justifications regarding the physical mechanisms that support those PAR definitions. In this paper, we show that in order to deliver high power efficiency, two MIMO-OFDM linear-scaling schemes are possible: one that scales all MIMO branches with the same factor and another that uses a different scaling factor for each branch. For each system, we derive a meaningful PAR metric that should be used.
ISSN:1089-7798
1558-2558
DOI:10.1109/LCOMM.2008.071961