Robust Linear Transceiver Designs for Vector Parameter Estimation in MIMO Wireless Sensor Networks Under CSI Uncertainty

This work conceives the robust linear transceivers for the estimation of an unknown vector parameter in a coherent multiple access channel (MAC)-based multiple-input multiple-output (MIMO) multi-sensor network under imperfect channel state information (CSI) at the fusion center (FC). Both the popula...

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Bibliographic Details
Published in:IEEE transactions on vehicular technology 2021-08, Vol.70 (8), p.7347-7362
Main Authors: Rajput, Kunwar Pritiraj, Verma, Yogesh, Venkategowda, Naveen K. D., Jagannatham, Aditya K., Varshney, Pramod K.
Format: Article
Language:English
Subjects:
decentralized estimation
Design criteria
Estimation
Iterative methods
MIMO communication
Optimization
Parameter estimation
Power consumption
Robust design
robust transceiver design
Sensors
stochastic robust design
Transceivers
Uncertainty
Wireless communication
Wireless networks
Wireless sensor networks
worst-case design
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Summary:This work conceives the robust linear transceivers for the estimation of an unknown vector parameter in a coherent multiple access channel (MAC)-based multiple-input multiple-output (MIMO) multi-sensor network under imperfect channel state information (CSI) at the fusion center (FC). Both the popular stochastic (S-) and norm ball CSI uncertainty (N-CSIU) models are considered for robust design. The proposed techniques are based on two design criterion, the first being, minimizing the mean squared error (MSE) of the estimate at the FC subject to total network power or individual sensor power constraints. Second, minimizing the total power consumption in the network while meeting a predefined level of MSE performance. Furthermore, the framework for precoder and combiner optimization is based on results from majorization theory, which leads to non-iterative closed-form solutions for the transceivers. While the most general scenario with correlated parameters and arbitrary observation SNR is considered to begin with, scenarios with uncorrelated parameters and high observation SNR are also considered as special cases, which makes the analysis comprehensive. Simulation results are presented to demonstrate the efficacy of the proposed schemes.
ISSN:0018-9545
1939-9359
1939-9359
DOI:10.1109/TVT.2021.3085838