A New Coded Cooperation Scheme for Wireless Communications and its Performance Analysis

Abstract

We propose a new coded cooperation scheme for wireless communications to obtain transmit diversity in the scenarios that agents such as mobile handsets, sensor network nodes and etc., due to size, power or other constraints, cannot utilize multiple antennas. New scheme supports more than two cooperative users with a relatively low cooperation level. We evaluate the performance of the proposed scheme in a frequency nonselective slow fading channel. For two cooperative users, we provide the exact analytical analysis. However, for more than two users, as the analytical analysis is very complicated, our performance evaluation is based on computer simulations. Our numerical results show that each of the N cooperative users obtains a full diversity order of N at moderate to high signal to noise ratio regimes. In addition, the results indicate that the new coded cooperation scheme can achieve a noticeable gain over the non-cooperative scheme. Further, the simulation results confirm the analytical derivations derived for two cooperative users.