Minimum Power Density Criterion Based Relay Selection and Power Allocation for Wireless Avionics Intra-Communications

Abstract

Wireless relay technology improves information capacity and brings diversity gain for wireless avionics intra-communications (WAIC) which will replace some cabling interconnections in aircraft. An amplify-and-forward(AF) relay selection scheme considering transmitter power level in the cabin has been proposed, with physical layer of multi-band Orthogonal Frequency-Division Multiplexing Ultra-wide band (MB-OFDM-UWB), of which outage probability performance is characterized in terms of the cluster and ray arrival rates. Furthermore, minimum power density principle based relay selection and power allocation scheme (MPRP) has been proposed to mitigate the limitation. In particular, Quasi-Newton method is used to solve nonlinear systems in the calculation of power distribution factor. Simulation results demonstrate that the proposed MPRP scheme achieves the optimized system energy efficiency.