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Pré-Publication, Document De Travail Année : 2018

Bias-variance tradeoff in MIMO channel estimation

Résumé

Channel estimation is challenging in multi-antenna communication systems, because of the large number of parameters to estimate. It is possible to facilitate this task by using a physical model describing the multiple paths constituting the channel, in the hope of reducing the number of unknowns in the problem. Adjusting the number of estimated paths leads to a bias-variance tradeoff. This paper explores this tradeoff, aiming to find the optimal number of paths to estimate. Moreover, the approach based on a physical model is compared to the classical least squares and Bayesian techniques. Finally, the impact of channel estimation error on the system data rate is assessed.
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Dates et versions

hal-01771225 , version 1 (19-04-2018)
hal-01771225 , version 2 (23-04-2018)
hal-01771225 , version 3 (25-04-2018)

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Luc Le Magoarou, Stéphane Paquelet. Bias-variance tradeoff in MIMO channel estimation. 2018. ⟨hal-01771225v3⟩
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