Iterative soft-Kalman channel estimation for fast time-varying MIMO-OFDM channels

Abstract : This letter addresses the problem of channel estimation in fast time-varying frequency selective channels. Considering orthogonal frequency division multiplexing in a multipleinput multiple-output system, we perform soft-Kalman filtering for channel estimation in conjunction with soft-interference canceling at the receiver to reduce the inter-carrier interference. We also propose two simplified implementations of the soft-Kalman filter for the case of constant-modulus signal constellations that allow considerable reductions in the receiver computational complexity, while performing more or less closely to the exact soft-Kalman estimator, depending on channel conditions. For non-constant-modulus signal constellations, however, the exact formulation of the soft-Kalman filter should be used.
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Contributor : Marie-Renée Friscourt <>
Submitted on : Friday, December 27, 2013 - 11:39:17 AM
Last modification on : Monday, March 4, 2019 - 2:04:24 PM



E.P. Simon, M.A. Khalighi. Iterative soft-Kalman channel estimation for fast time-varying MIMO-OFDM channels. IEEE wireless communications letters, IEEE comsoc, 2013, 2, pp.599-602. ⟨10.1109/WCL.2013.081413.130515⟩. ⟨hal-00922487⟩



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