Joint Timing Synchronization and Channel Estimation in Uplink of Time Domain Synchronous OFDMA

Multiple users TDS-OFDMA has been proposed based on time domain synchronous orthogonal frequency division multiplexing (TDS-OFDM). This multiple access schemes used mostly in mobile broadband wireless access scheme in uplink transmission due to the multiple user interference in timing offset and frequency offset problems. In this paper we are focusing on timing synchronization and channel estimation. Time-space two dimensional structure is used in TDS-OFDMA and perfect sequence is used for guard interval in it to achieve joint timing synchronization and channel estimation for each user. Simulations are performed for timing synchronization in 0dB SNR value and for channel estimation using perfect sequence in different AWGN-multipath channel.