Array antenna assisted doppler spread compensator with vehicle speed estimator for OFDM receiver

This paper proposes a new array antenna assisted Doppler spread compensator having a vehicle speed estimation function. The array antenna assisted Doppler spread compensator compensates for the Doppler spread by estimating the received signal at the stationary point with respect to the ground. However, the compensator requires the vehicle speed for compensation. The proposed vehicle speed estimator first observes the residual Doppler spread compensation error and then adjusts the estimated speed which minimises the error. Computer simulation results show that the speed estimator allows us to obtain the accurate estimate of the vehicle speed. The proposed compensator can considerably improve the bit error rate in the mobile reception of DTTB.