Outage Probability Analysis of One-way Distributed Cooperative Relay Selection Networks

The relay-selection technique has become one of the key-technologies and one of the most functional approaches of modern wireless communication engineering to improve the wireless systems performance. In this work, we introduce a wireless cooperative network utilizing a relay selection (RS) technique and examine the outage probability of the system under the channel environment conditions. The RS are assigned to choose only the optimum 4-relays from K-available relays to improve the performance of our proposed scheme. Probability density function (PDF) and cumulative density function (CDF) have been theoretically used to compute the outage probability of the relay paths in Rayleigh fading channels. It is shown by computer simulations, the proposed distributed extended orthogonal space time block coding (D-EO-STBC) with RS provides significant improvement in the outage probability as compared to the conventional D-EO-STBC in [11].