2D joint estimation of information symbols and channel frequency response in OFDM communication systems

O. Myronchuk; O. Shpylka

doi:10.3103/S0735272723090029

Authors

O. Myronchuk National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine https://orcid.org/0000-0001-5251-3578
O. Shpylka National Technical University of Ukraine “Igor Sikorsky Kyiv Polytechnic Institute”, Kyiv, Ukraine https://orcid.org/0000-0003-1391-4031

DOI:

https://doi.org/10.3103/S0735272723090029

Keywords:

OFDM, digital communication systems, wireless channel, channel frequency response, channel estimation, autoregressive process, Kalman filter

Abstract

The paper proposes a method of two-dimensional joint estimation of information symbols and channel frequency response in OFDM communication systems based on the Kalman filter. The technique consists of two stages. In the first stage, estimates are iteratively calculated in the forward and backward directions concerning the array of processed data in the frequency dimension and on each of the subcarriers in the time domain. In the second stage, the obtained results are combined. The correlation properties of the channel are assumed to be known. The statistical simulation analyzes the proposed method using a model example. The results of estimating the channel parameters by the proposed method are compared with those obtained by known methods. The computational complexity of the developed method is determined.

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