A novel parametric channel estimation approach for OFDM systems

This paper proposes a novel parametric channel estimation approach for orthogonal frequency-division multiplexing (OFDM) systems. The method is composed of two parts: estimation of channel parameters and estimation of channel coefficients. The exponentially embedded family (EEF) criterion is exploited to determine the number of channel paths as well as the multipath time delays. Based on these parameters, channel frequency responses are estimated. Additionally, our scheme is computational efficient due to the needless of eigenvalue decomposition (EVD) or the estimation of signal parameters by rotational invariance technique (ESPRIT). Simulations are provided to validate the performance of our algorithm from the perspectives of channel parameter error probability (CPEP) and mean square error (MSE).