A new time-frequency synchronization scheme for OFDM-TDMA systems

Bursty data transmission over OFDM systems requires rapid time-frequency synchronization using a desirable short-time training sequence. Several sophisticated methods provide frame and carrier recovery in two symbols. We formulate these methods with a common notation and this leads us to address an oversampled scheme which allows synchronization in only one symbol. In our proposal, the limit of the acquisition range for the carrier frequency offset can be extended to /spl plusmn/N the subcarrier spacing instead of /spl plusmn/1 the subcarrier spacing as previous methods. Discussions about its robustness against channel and noise are included and supported by several representative computer simulations.