Joint timing S ynchronization and channel estimation using perfect sequence in uplink time domain synchronous OFDMA


  • M Lakshmanan VIT University
  • P S Mallick VIT University
  • L Nithyanandan Pondicherry Engineering College


Time Domain Synchronous Orthogonal Frequency Division Multiple Access (TDS-OFDMA) is used in mobile broadband wireless access scheme in uplink transmission. This leads to multiple user interference due to timing offset and frequency offset. In this paper, the effect of timing offset and channel estimation in mobile broadband system is analysed. Time-space two dimensional structure is used in TDS-OFDMA and perfect sequence is used for guard interval to achieve perfect timing synchronization and channel estimation for each user. Simulations are performed for timing synchronization and channel estimation using perfect sequence under Urban channel, Indoor Office B channel and HIPER LAN-A channel. Simulation results show that the timing synchronization is achieved and channel estimation performance using perfect sequence is better than CAZAC and PN Sequences.

Author Biographies

M Lakshmanan, VIT University

Lakshmanan. M received the B.E. degree in Electronics and Communication from Madras University in 2001 and M.E. degree in Communication Systems from Anna University in 2006. Currently, he is working as an Assistant Professor (Selection Grade) in School of Electronics Engineering, VIT University, Tamilnadu, India. He has eleven years of teaching experience. He is a member in IEEE and life member in ISTE. His current area of research interest includes Wireless Communication and Networks, Security Algorithms, Signal Processing Techniques, Digital Communication and Information Coding Theory.

P S Mallick, VIT University

Dr. P. S. Mallick, (M’03, SM’10) received M.S degree from the University of Chittagong, Bangladesh and Ph.D from Jadavpur University, India. He worked 4.5 years in a Sweden based electronics industry named IAAB Electronics as a Technical Head. He has 10 years of Teaching experience where he led various  research teams and developed “Online  Lab in Microelectronics”, “ Monte Carlo Simulator, “ and “Electric Fencer”.  His current area of research interest includes Optoelectronic materials and Devices, Nanoscale CMOS and Nanoelectronics. He has published 33 research papers in different Journals and Conferences of International repute and authored a book on Matlab and Simulink. At Present Dr. P. S. Mallick is working for School of Electrical Engineering, VIT University, Tamilnadu, India, as a Professor. He has received the prestigious Jawaharlal Nehru Scholarship in 1998 for his doctoral research work. He is one of the enlisted technical innovators of India in 2007.

L Nithyanandan, Pondicherry Engineering College

Dr. L. Nithyanandan   received   Bachelor   of Engineering from University of Madras in 1992, Master of Technology in 1999 and Ph.D. degree in 2006 from Pondicherry University. He is working as an Associate Professor of Electronics and Communication Engineering, Pondicherry Engineering College, Puducherry, India. He is a gold medalist in PG and has been awarded with chief minister medal for his outstanding performance in PG. He has more than 22 publications in National / International conferences and Journals. His areas of interest include Sensor Networks, Telemedicine, Spread Spectrum Techniques and Wireless Communication