Transmultiplexers, the basis of which is filter banks, have been successfully utilized for multiuser communications. One important limitation however, is the leakage of signal from one channel to another known as crosstalk. This occurs because the core elements, synthesis and analysis filters employed are nonideal. To minimize its effect has been the focus of transmultiplexer design. This study therefore investigates a new approach to transmultiplexer design using the FRFT based filter banks in the processing of nonstationary signals. This method can enhance the elimination of the crosstalk and amplitude distortion.