Sec ured Text Message Transmission i n Pre - Channel Equalization Based Mimo - O fdm System With Implementation of Concatenated Ecb and Cfb Cryptographic Algorithm
Shahrina Sultana, Laila Naznin, Md. Golam Rashed, Shaikh Enayet Ullah · Journal of Engineering Science and Technology Review · 2012
In this paper, we made a comprehensive performance evaluative 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.The simulated system deploys three channel coding techniques (1/2-rated Convolutional, CRC and BCH).In the present simulated system, text message transmission has been secured with concatenated implementation of Electronic Codebook (ECB) and 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 with increase in noise power as compared to signal power.