An Improved CIR-Based STR Scheme for MISO Mode in DVB-T2 System

We propose an improved CIR(Channel Impulse Response)-based fine STR(Symbol Timing Recovery) scheme for multi-input single-output (MISO) transmission mode of DVB-T2 system. At first, we present an efficient method to estimate the CIRs of MISO transmission. Then, the effective method for resolving the ambiguity of CIR is proposed by categorizing the ambiguity effect under the assumption of a false coarse STO(Symbol Timing Offset) and by changing the starting point of FFT window successively. Simulation results show that the proposed fine STR achieves the fine synchronization without an inter-symbol interference(ISI) in the large delay channels causing the ambiguity effect of CIR.