Performance analysis of transmit antenna selection and relay selection in two-hop multiple MIMO relaying

This paper analyzes cooperative diversity wireless networks with the application of multiple-input multiple-output (MIMO) techniques, using amplify-and-forward (AF) MIMO relaying with transmit antenna selection (TAS)/maximal-ratio combing (MRC) and relay selection (RS). The source, destination, and relays are equipped with multiple antennas, denoted by N_S, N_D, and N_R, respectively. Specifically, the asymptotic performance is analyzed and the derived upper bound and lower bound on the diversity order leads to the conclusion that the diversity order of N_SN_D +N_Rmin{N_S;N_D} can be achieved in the cooperative AF MIMO relaying scenario, which depends on the total number of relay antennas rather than the individual number of each relay´s antennas. Numerical results that confirm our analysis are also presented in the paper.