Abstract
In this paper, we present a robust and low complexity channel estimation method for a 2×1 multiple input-single output (MISO) digital video broadcasting terrestrial 2 (DVB-T2) system in high speed mobile environments. A two-dimensional (2D) filter with a non-rectangular magnitude response is employed as an interpolation filter in this research work. In order to improve performance of the interpolation filter in a 2×1 MISO system, we propose a 3-point diagonal averaging method. Simulation results show that a combination between the proposed method and the two-stages implementations of a non-rectangular 2D filter produces the best performance in very high speed mobile environments. The proposed method also has a capability to optimize a diversity gain provided by Alamouti scheme.
