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Joint Timing Synchronization and Channel Estimation Using Perfect Sequence in Uplink Time Domain Synchronous OFDMA

Lakshmanan M., Mallick P.S., Nithyanandan L.

International Journal of Electronics and Telecommunications

2016

Vol. 62, No. 3

225--229

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.

A note on the length of perfect sequences in ordered sets with PT-ordered

Rutkowski A.

Demonstratio Mathematica

2003

Vol. 36, nr 4

779--784

For any ordinal α there exists a bipartite ordered set P containing no infinite fences such that P has a perfect sequence of length α.