PRACTICAL RAKE RECEIVER ARCHITECTURE FOR THE DOWNLINK COMMUNICATIONS IN A DS-CDMA MOBILE SYSTEM

The authors deal with a practical architecture for a RAKE receiver sui table for the downlink communication in a direct-sequence code divisio n multiple access (DS-CDMA) mobile system. The proposed RAKE receiver makes use of a pilot signal broadcast by the base station to obtain ch annel parameter estimation and synchronisation. Computer simulations h ave been carried out in deriving the performance in terms of bit-error probability under typical multipath fading propagation conditions of GSM applications. Comparisons with an ideal RAKE receiver and with a m ultipath rejection receiver recently proposed in the literature, for t he same type of downlink channel, are shown to highlight the good beha viour of the proposed receiver.