On channel estimation for RAKE receiver in a mobile multipath fading channel

model, a RAKE receiver can be used to detect the signal from the multipath fading channel. the tap weights were assumed known when deriving RAKE receiver, but in practice a correlator is used to estimate the tap weights. Multipath fading is one of the major practical concernS in communications. Multipath problem always exists in mobile environment, especially for m~ bile unit which is often embedded in its surroundings. RAKE receiver has been used to reduce the multipath fading in a wide-band spread spectrum mobile system. However, the tap weights of the multipath channel model need to be estimated. In this paper, we proposed a least-square approach to tap weight estimation based on chip rate channel estimates in a realistic mobile environment. Simulations show that the new approach outperforms the existing approaches. /