Performance analysis of underwater wireless communication networks

In underwater acoustic sensor networks (UWASNs), several transmitters using the same power send data to the sink. Then, the sink will collect more interference because of the slow-fading of signal, due to this, a higher outage probability and high energy consumption occurs. Underwater wireless communication is quite difficult because of the factors like propagation delay, small available bandwidth, strong signal attenuation, and interference from natural and man-made acoustic interferences. In underwater wireless acoustic communication all these factors depend on the frequency and distance. Higher frequency defines the worst case in terms of power consumption, and in terms of battery lifetime of the network. So in this work, we consider optimal distance between transmit nodes and receiver node to enhance the performance. The optimal power control schemes has been proposed in underwater wireless networks, of which the principle thought is to utilize distinctive power levels for enhancing the performance. By using this scheme, we get reduction of outage probability and enhancement of transmission capacity. Simulation results confirm the effectiveness of the optimal power allocation schemes compared to the frequency domain allocation scheme.