A sub-block orthogonal single carrier frequency domain equalization system in fast Rayleigh fading channel

In this paper,we analyze the frequency domain linear equalization(FDLE) of single carrier block transmission(SCBT) systems under fast fading channel.First,we propose a new approximating model in which the channel is assumed to be static in sub-blocks vary each other.Based on this model,we derive a new 2-orthogonal-sub-blocked frequency domain equalization method.Then,we derive the conditions of the channel under which the equalization method can be applied to the 2-orthogonal-sub-blocked systems.Simulation demonstrates that the proposed method can improve the anti-Doppler ability of SC-FDLE and at the same time keep its high efficiency and low complexity.