Combination of Cryptography and Channel Coding for Wireless Communications


Huge investigations have been made by the research communities in wireless systems, especially in the past decades. There are a lot of applications over wireless communications networks that have appeared in the recent time, including cellular phones, video conferencing, MMS, SMS, web browsingetc. Communications through wireless channels are exposed to errors in transmission. Moreover, efforts are being made to secure wireless communications through the use of modern encryption technologies. In this paper a combination of cryptography and simple channel codes are presented to make security and forward error correction. The system has been tested to transmit and receive a text with and without encoding for Additive White Gaussian Noise (AWGN). The results showed that it can receive the text with no error at 6 dB of Signal to Noise Ratio (SNR) without using channel coding and 1 dB with it. In addition the systems is experimented in urban wireless system, and has shown that it needs 9 dB to receive the text with acceptable error. All tests are done using Matlab version R2014a