A novel blind detection technique for MSR-OFDM system

Multiple signal representation (MSR) is a promising distortionless technique to reduce the high peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals. However, the drawback of MSR-OFDM system is the need of transmitting extra side information (SI) for informing the receiver the index of the transmitted signal, which may decrease the transmission efficiency. In this paper, a new blind detection technique is proposed for improving the transmission efficiency and the robustness of SI in MSR-OFDM system. The basic principle is to represent SI by PN sequences, then overlap the PN sequences on the data symbols for transmission. In the receiver, a blind detection algorithm is employed with moderate complexity. Simulation results show that the proposed new technique can efficiently improve the robustness of the SI by achieving large SNR gain but without loss of transmission efficiency.