A new detection algorithm for OFDM system without cyclic prefix

In OFDM system, cyclic prefix (CP) is necessary to combat intersymbol interference (ISI) and intercarrier interference (ICI). Employing CP simplifies the channel equalization, but results in a considerable bandwidth loss. In this paper, a multicarrier detection algorithm is proposed for OFDM system without CP, which implements the successive detection by decision-feedback equalizer (DFE) based on minimum mean-square error (MMSE) criterion. Simulation results show that the proposed scheme has higher bandwidth efficiency and better performance in bit error rate (BER).