Timing synchronization with insertion of zero-padding preambles for OFDM systems

Synchronization for both time and frequency is a well-known issue in OFDM systems. In order to avoid signal distortion, synchronization is the major job to be completed generally in the receiver end. Especially, the timing error compensation is the first task to be done. This paper proposes two modified preamble patterns with insertion of zero padding for timing synchronization by using the correlation between two identical halves of a training sequence to estimate the timing offset. Those preambles have the potentials to reduce the computational complexity without degrading system performance. Some comparative simulations are given to illustrate the advantages of the proposed synchronization schemes.