WCDMA channel estimator using common pilot channel

PURPOSE: An apparatus for estimating a WCDMA(Wideband CDMA) channel response using a CPICH(Common PIlot CHannel) is provided to show excellent performance for a fast fading channel as well as a slow fading channel by using a CPICH. CONSTITUTION: An apparatus for estimating a WCDMA channel response using a CPICH consists of a complex correlation part(31), delay parts(41-45), multiplication parts(51-56), and addition parts(61-65). The complex correlation part(31) takes and correlates the conjugate complex numbers of the pilot symbols inputted from a despreader(1). The delay parts(41-45) sequentially delay the outputs of the complex correlation part(31) by the symbol. The multiplication parts(51-56) multiply the outputs of the complex correlation part(31) and the delay parts(41-45) by a complex value weight factor respectively. The addition parts(61-65) add up the outputs of the multiplication parts(51-56), update symbols, and output phase offset compensated signals.