Secure text message transmission in a 4G compatible MIMO MCCDMA system with combined implementation of Vigenere Cipher and RSA cryptographic algorithm
Mousumi Haque · International Journal of Advanced Information Technology · 2012
In this paper, a comprehensive performance evaluative study has been made on a secured MIMO MCCDMA wireless communication system with implementation of Minimum Mean Square Error (MMSE) and Zero-Forcing (ZF) Linear channel equalization schemes.The 4G compatible system deploys two channel encoding schemes(1/2-rated Convolutional and CRC ) under BPSK,DPSK QPSK and QAM digital modulations.In the present simulated system, a text message transmission has been secured with concatenated implementation of Vigenere Cipher and RSA cryptographic algorithm.It is anticipated from the numerical results that with MMSE channel equalization and 1/2-rated Convolutional channel Encoding schemes, the MIMO MCCDMA system outperforms in BPSK digital modulation under AWGN and Raleigh fading channels.In CRC channel coding, the system shows comparatively worst performance in higher Signal to Noise ratio(SNR) values under DPSK, QPSK and QAM digital modulations.It has been observed from the present study that the system performance deteriorates with increase in noise power as compared to signal power.