Literature survey: Cooperative diversity for a simple three-terminal relay channel was first introduced in [12]. Later, in [1], several improvements were made to capacity constraints and cooperative schemes, such as decoding and forwarding, were introduced. Modifications to the amplify and forward scheme have been proposed in [13-16]. Based on these, more retransmission schemes were introduced in [17-24]. The performance and other characteristics of the above schemes in different environments have been studied in [17-27]. Extensions to a multi-terminal and multihop network were realized in [13-17], where a cluster model and an ad hoc network architecture were studied and useful results were obtained for transmitting and receiving diversity gains and relay. Although full diversity gains are not achieved compared to MIMO due to individual antenna elements, data rate gains can be achieved compared to non-cooperative cases [13]. Cooperative spatial multiplexing schemes are also studied in [9-10, 28-29]. In this project, the cooperative form of decoding and forwarding scheme for single antenna terminals, which provide spatial diversity, is analyzed. Cooperative space-time coding introduced numerous problems to solve, such as terminal localization, temporal synchronization, and distributed processing among cooperative terminals. Cooperative spatio-temporal coding for cluster networks is still under development. In [7], a short-range link in each cluster is proposed to achieve synchronization and combined processing for Alamouti spatio-temporal coding. In [8], the performance of cooperative spatio-temporal coding is studied. In general, cooperative space-time codes adopt both cooperative diversity schemes and cooperative spatial multiplexing schemes [11]. The success of… half of the article… considering the high SNR behavior of the outage probability based on the cumulative distributed function (CDF) of some exponential random variables. Several cooperation protocols have also been proposed for wireless networks to combat the severe effect of fading. Zhao, Yi et al. presented an asymptotic analysis of SER for amplified selection and forward system [17, 18] and compared it with the conventional full participation scheme. Seddik, Karim G., et al. derived the probability of failure of the multi-node amplification and forwarding system with N nodes that help the source in forwarding information. Sadek et al. in [21] the closed form SER was derived for PSK and QAM signals. Various protocols are proposed in the literature for selecting the best relay among a collection of available relays. In [28], the authors proposed to choose the best relay based on its geographical location.