Research Journal of Information Technology1815-74322151-7959Science International10.3923/rjit.2013.218.225RaajanN.R. PhilominaA. Jenifer RamkumarM. JayabhavaniG.N. NishanthiniC. 2201352High data rate and vulnerable are major challenges faced by present wireless
communication systems since the demand for the internet and multimedia services
are rapidly increasing and also the multimedia information are more secured
in wired environment than in wireless environment. Orthogonal Frequency Division
Multiplexing (OFDM) has been considered as a hopeful technique for to achieve
high data rate transmission, it also has many advantages like spectral efficiency,
robust to multipath fading effect, easy hardware implementation etc. Though
OFDM has many advantages, it is highly sensitive to synchronization error. Since
the error rate is increased and the system performance is degraded due to synchronization
error, it seems to be a major problem in OFDM. An Inter-Symbol Pilot Aided Algorithm
is used to overcome this problem which estimate and compensate the synchronization
error. In this study, the data is secured using Hash Encryption Algorithm which
introduces authentication and encryption in OFDM system, without impairing its
spectral efficiency. In this study, an OFDM system is designed with improved
security and synchronization which increases the overall efficiency of the system.]]>Rabah, K.,20054204221Tan, L. and X. Sun,20111016081613Raajan, N.R., A.J. Philomina, M.V. Priya, B. Monisha and S. Suganya et al.,20122012pp: 658662Raajan, N.R., B. Monisha, N. Rangarajan and R. Vishnupriya,20122012Salari, S., M. Ardebilipour and M. Ahmadian,20088809815Tahir, M., S.P.W. Jarot and M.U. Siddiqi,20102010pp: 304pp: 304Qin, T. and H. Chen,201211102109Fu, Y., X. Wang and S. Li,2009811971204