Estimation of Mobile Speed Using Doppler Over Fading Channels

This paper investigates on the mobile speed estimation of broadband wireless communications with severe inter symbol interference duet to large number of fading channel taps. This research is based on the received signals which consists of unknown transmitted data, selective fading channel, unknown frequency coefficients including line-of-sight (LOS) components, and random receiver noise. In-order to estimate the speed of mobiles with the received signal power Modified normalized auto-covariance method is used. The developed algorithm shows a better results for Rician , Rayleigh and Nakagami channels. The algorithm provides accurate speed estimation even if the signal-to-noise ratio (SNR) is low. Simulation results shows that the new algorithm is suitable for estimating mobile speed relative to a maximum Doppler of 500 H.