Security enhancement in the receive diversity with co-operative relay for wireless networks

In this paper, a dual hop diversity communication system which is highly confidential for wireless applications is proposed to transmit the secret information from the source to receiver in the presence of interferences. In this proposed wireless communication system, the receiver is equipped with multiple antennas whereas the relays and interference are equipped with single antenna. The output signal is combined with a maximum ratio combiner (MRC) and then process it by the weighting vector and finally amplifying the receive signal by the relays. To do that the amplify-and-forward (AF) as well as decode-and forward (DF) strategies of the relays are used to increase the signal strength of the receive diversity and relay gain. Moreover, moment generating function (MGF) is used to maximize the diversity order for increasing the capacity of the receive signal and symbol error probability (SEP). Finally, the Monte Carlo simulation model is used to show the effectiveness of the proposed technique. From the simulation results, it is clear that the receive signal capacity can be significantly optimized in terms of SEP by using the AF, and DF strategies.