This paper provides a new method of iterative soft detection receiver to suppress the Inter-Cell Interference(ICI) in the next generation communication Orthogonal Frequency Division Multiplexing(OFDM) system. With the combination of the Interleave-Division Multiple Access(IDMA) technology, the new Elementary Signal Estimator(ESE) in the receiver suppresses the interference from neighbor cell. Besides, the soft detection technology in the receiver can achieve the system with high-order modulation signal by using iterative detection scheme. Monte Carlo simulation results show the proposed receiver obtains the good BER performance in both AWGN and Rayleigh channel for 16QAM modulation scheme.