CHANNEL ESTIMATION MC-CDMA MULTIUSER RECEIVER

摘要

PURPOSE: A channel estimation MC(Multiple Carrier)-CDMA(Code Division Multiple Access) multiuser receiver is provided to estimate a channel in a multipath fading channel without a specific channel estimation device by using a path variety in the multipath fading channel as a frequency variety and embodying an RBF(Radial Basis Function) network having a channel equalizing function in the MC-CDMA multiuser receiver. CONSTITUTION: A multiplier(21) converts a receiving signal through a frequency selective fading channel into a baseband signal. A protection interval removing unit(22) removes a protection interval from an output signal of the multiplier(21). A serial/parallel converting unit(23) converts an output signal of the protection interval removing unit(22) into a parallel type signal. A DFT(Discrete Fourier Transform) unit(24) performs a DFT of a time axis signal outputted from the serial/parallel converting unit(23) to convert the time axis signal into a frequency axis signal. An RBF network(100) learns one among signal combinations of a multiuser outputted from the DFT unit(24) and estimates a change of a channel to obtain random user receiving information.