Subsidiary cluster head with cooperative modulation diversity applied to heterogeneous wireless sensor networks

Wireless sensor networks have a wide range of applications such as automatic monitoring systems and target tracking. This paper proposes and evaluates the performance of a cooperative modulation diversity technique applied to heterogeneous wireless sensor networks. The evaluation of the impacts between the energy factor, lifetime, the channel Signal-to-Noise Ratio (SNR) and the packet loss rate is presented and results based on the maximum number of retransmissions, network size, packet length and initial energy by nodes are provided. For different propagation scenarios and with two values of interleaving depth (k), the cooperative modulation diversity performance is evaluated. Our scheme shows better performance and retransmission algorithm is discussed.