S. Saravana Kumar, R. Dharani, Aniruth Sabapathy, D. Nirmaldas and S. Srikanth, Panimalar institute of technology, India

In the present simulated system, text message transmission has been secured with concatenated implementation of Cipher Feedback(CFB) cryptographic algorithm. It is anticipated from the numerical results that the pre-ZF channel equalization based MIMO OFDM wireless communication system outperforms in QAM digital modulation and BCH channel coding under AWGN and Raleigh fading channels .In Pre-MMSE/pre-ZF channel equalization scheme, the system shows comparatively worst performance in convolutional channel coding scheme with QAM/QPSK digital modulation. It has been observed from the present study that the system performance deteriorates withincrease in noise power as compared to signal power. study of a secured MIMO Orthogonal Frequency-Division Multiplexing wireless communication system with implementation of two pre channel equalization techniques such as Pre-Minimum Mean Square Error (Pre-MMSE) and Pre-Zero Forcing(Pre-ZF) under QPSK and QAM digital modulations.

MIMO-OFDM, Pre-MMSE, Pre-ZF, ECB and CFB cryptographic algorithm, Bit Error rate(BER), AWGN andRaleigh fading channels.