Effect of employing beamforming on OFDM systems in Rician channel

摘要

We analyze the inter-carrier-interference (ICI) caused by multiple Rician path and Doppler spreading in orthogonal frequency division multiplexing (OFDM) systems. The general form for the ICI power is derived by taking into consideration the correlation equation of the Rician channel. We have derived a equation for estimating the frequency tracking parameter. We also present examples by using ideal beamforming at the mobile. For a multiple Rician channel, it shows that the reduction in ICI power is not as much as in the case of Rayleigh channel. However, in the presence of only one Rician path, the reduction in ICI power is marginally better than the Rayleigh channel.