SECURITY AND BER PERFORMANCE TRADE-OFF IN WIRELESS COMMUNICATION SYSTEMS APPLICATIONS

摘要

There is nowadays a strong need of designing communications systems with excellent BER performance and high levels of privacy, specially in wireless networking and mobile communications. The transmission of encrypted information over a noisy channel presents an error propagation effect, which degrades the BER performance of the system. In this paper, we present combined error-control coding and encryption schemes based on iteratively decoded error-control codes like LDPC and turbo codes and AES algorithm. We show that the proposed schemes strongly reduce this degradation effect. The increase of the level of privacy is obtained by using procedures of pseudo random nature over the encoders and decoders of the error-control code. Thus, the proposed schemes provide a given communication system with excellent BER performance and encryption capabilities.