Variable step-size adaptive channel estimation for WCDMA receiver

An efficient channel estimation algorithm using a variable step-size adaptive filter is proposed for wideband code division multiple access (WCDMA) communication systems. The new algorithm is able to achieve a fast convergence and a low steady state error compared with a conventional constant step-size adaptive filtering method. The proposed algorithm is analyzed and simulated for multipath Rayleigh fading channels, showing the true channel response and the estimation results. The BER performance of the system is also simulated and compared with the Bhattacharyya bound.