Abstract: In this paper the problem of joint estimation of PN code delay and multipath channel coefficients is considered. We present an estimator based on the unscented filter (UF) for the joint estimation of delay and multipath, and obtain the simulation results of the estimator. Next the mean square error (MSE) of the UF estimator is compared with both the MSE provided by EKF and the Cramer-Rao lower bound. The results show that the UF performs better than the EKF in multipath channels.

Key words: delay tracking, multipath, unscented filter, channel estimation