Evaluate Comparative of Cooperative Relaying Protocols in Wireless Communication

future generations of cellular communications require higher data rates and more reliable transmission link .Cooperative communications have a great significant in modern communications as they improve the information transmission between the source and the destination by using the relays. The relaying schemes are Amplify-and-Forward (AF) in which the relay sends an amplified copy of its receive signal and consequently serves as a repeater. In contrast, for Decode-and-Forward (DF) the relay performs a complete decoding of the receive signal and transmits the re-encoded message. This paper is a complete study of cooperative systems, analyzing its performance and comparing the use of two protocols amplify and forward (AF) and decode and forward(DF) with single and multi relays scenarios by measuring bit error rate using matlab.