  In Spectrally Efficient Frequency Division Multiplexing systems the input
data stream is divided into several adjacent subchannels where the distance of
the subchannels is less than that of Orthogonal Frequency Division
Multiplexing(OFDM)systems. Since the subcarriers are not orthogonal in SEFDM
systems, they lead to interference at the receiver side. In this paper, an
iterative method is proposed for interference compensation for SEFDM systems.
In this method a soft mapping technique is used after each iteration block to
improve its performance. The performance of the proposed method is comparable
to that of Sphere Detection(SD)which is a nearly optimal detection method.
