Single-carrier frequency-domain equalization for STBC transmission system based on multiple blocks modulation

A block modulated (BM) algorithm is proposed for STBC block transmission system combined with single carrier frequency domain equalization (SC-FDE) with two transmit antennas and one receive antenna, and the system redundancy caused by cyclic prefix (CP) is evidently reduced. At the transmitter, multiple blocks are jointly modulated and framed together, so one single CP is shared by the multiple blocks to reduce the system cost. The STBC blocks can be achieved by decomposing the received BM frame without inter-block interference (IBI), and the decisions on the transmitted blocks can be obtained after space-time combining and frequency domain equalization. The spectral efficiency of the new system is improved dramatically by the BM algorithm without performance degradation, and the detecting performance of the new scheme is verified by Monte Carlo simulations.