An efficient RAKE receiver architecture with pilot signal cancellation fordownlink communications in DS-CDMA indoor wireless networks

This letter deals with a RAKE receiver architecture which makes use of a pi lot signal broadcast by the base station to obtain channel parameter estima tes in a direct-sequence code division multiple access (DS-CDMA) indoor wir eless network. Differently from previous approaches, a suitable cancellatio n algorithm is used to reduce multipath interference due to the pilot signa l. Numerical results are used to demonstrate the performance of the propose d RAKE receiver in terms of bit error probability under typical multipath f ading propagation conditions, Performance comparisons with the ideal case o f perfect channel parameter estimation are given in order to highlight the good behavior of the proposed approach.