Extraction of the Third-Order 3\times3 MIMO Volterra Kernel Outputs Using Multitone Signals

This paper uses multitone signals to simplify the analysis of 3{\times} 3 multiple-input multiple-output (MIMO) Volterra systems by isolating the third-order kernel outputs from each other. Multitone signals fed to an MIMO Volterra system yield a spectrum that is a permutation of the sums of the i...

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Bibliographic Details
Published in:IEEE transactions on microwave theory and techniques 2018-11, Vol.66 (11), p.4985-4999
Main Authors: Khan, Zain Ahmed, Zenteno, Efrain, Handel, Peter, Isaksson, Magnus
Format: Article
Language:English
Subjects:
Baseband
Crosstalk
Frequency-domain analysis
hardware impairments
Kernel
MIMO communication
multiple-input multiple-output (MIMO)
multitone signals
Radio frequency
Transmitters
Volterra kernels
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Summary:This paper uses multitone signals to simplify the analysis of 3{\times} 3 multiple-input multiple-output (MIMO) Volterra systems by isolating the third-order kernel outputs from each other. Multitone signals fed to an MIMO Volterra system yield a spectrum that is a permutation of the sums of the input signal tones. This a priori knowledge is used to design multitone signals such that the third-order kernel outputs are isolated in the frequency domain. The signals are designed by deriving the conditions for the offset and spacing of the input frequency grids. The proposed technique is then validated for the six possible configurations of a 3\times 3 RF MIMO transmitter impaired by crosstalk effects. The proposed multitone signal design is used to extract the third-order kernel outputs, and their relative contributions are analyzed to determine the dominant crosstalk effects for each configuration.
ISSN:0018-9480
DOI:10.1109/TMTT.2018.2854186