Joint Antenna Selection and Power Allocation Scheme in Two-way AF Channels with OFDM Signals

Antenna selection, power allocations, and Orthogonal Frequency Division Multiplexing (OFDM) are key components of modern wireless communication systems (5G and beyond). In this paper, I propose a joint antenna selection and power allocation scheme in a two-way amplify-and-forward (AF) relay channel with orthogonal frequency division multiplexing (OFDM) signals. I use sum-rate maximization as a metric to jointly find the best antennas and the best allocated powers at the communication nodes over different sub-carriers. Simulations results demonstrate that joint antenna selection and power allocation scheme significantly enhances the performance.