Frequency-domain equalization for antenna diversity reception of DS-CDMA signals

A coherent rake combiner is employed as the channel matched filter in a DS-CDMA mobile radio. However, as the number of propagation paths increases, the coherent rake receiver incurs a serious degradation in the bit error rate (BER) performance due to severe inter-path interference (IPI). In this paper, frequency-domain equalization employed in multi-carrier code division multiple access (MC-CDMA) is applied to achieve the frequency diversity effect while suppressing IPI for the antenna diversity reception of DS-CDMA signals. The BER performance improvement in a frequency-selective Rayleigh fading channel is evaluated by computer simulation.