International Journal of Engineering and Technology

Broadband application of wireless communication calls for good signal to noise ratio (SNR) and variable high data rates. In the midst of a spate of available techniques, Orthogonal Frequency Division Multiplexing (OFDM) has proven to be effective. OFDM systems have high tolerance towards multipath effects in fading channels. Wireless communication will become tortuous in the presence of Inter Symbol Interference (ISI). This complex situation is un-raveled by introducing Cyclic Prefix (CP) prior to transmission over fading channels. In this paper, an idea has been proposed for incorporating Cyclic Prefix (CP), Cyclic Post Fix (CPOF), Zero Padding (ZP) schemes in OFDM system while embedding the secret data for secure data transmission. BER graphs are simulated and compared for various modulation techniques like Binary Phase Shift Keying (BPSK), Quadrature Phase Shift Keying (QPSK) and Quadrature Amplitude Modulation (QAM) prior to embedding and after embedding the secret data.