Bias-variance tradeoff in MIMO channel estimation

Luc Le Magoarou; Stéphane Paquelet

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arXiv · 1804.07529

Bias-variance tradeoff in MIMO channel estimation

Luc Le Magoarou·Stéphane Paquelet

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Abstract

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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BibTeX RIS

Luc Le Magoarou, Stéphane Paquelet. 2018-04-20. Bias-variance tradeoff in MIMO channel estimation. https://arxiv.org/abs/1804.07529

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