Summary: IEEE TRANSACTIONS ON NEURAL NETWORKS, VOL. 12, NO. 6, NOVEMBER 2001 1539
Fig. 6. Performance comparison with respect to the number of users.
(Eb=No = 18 dB, L = 5).
Therefore, we can conclude from results presented in Fig. 5 that the pro-
posed receiver effectively utilizes the frequency diversity. BER com-
parisons between the proposed receiver and the MUD using an RBF
network under conditions of perfect channel estimation, confirm that
the channel estimation of the proposed receiver can be properly exe-
cuted at 15 dB Eb=N o.
Fig. 6 shows the BERs for the three receivers plotted against the
number of users, where Eb=N o is fixed at 18dB and the number of
multipaths is fixed at five. This figure illustrates that the performance
improvement of the receiver using an RBF network turns out to be
greater than that of the MUD with PIC. The reason for this is that the
proposed receiver effectively utilizes the signal components of other
users, which are considered interference and are canceled in the case
In this paper, we proposed a multiuser receiver with channel esti-
mation capability using an RBF network in an MC-CDMA system.