Joint power allocation and location optimization for full-duplex amplify-and-forward relay networks

In this paper, we optimize the the symbol error rate (SER) performance of full-duplex (FD) amplify-and-forward (AF) relay system by adopting the joint power allocation and relay location optimization. We first derive the asymptotic expressions of the outage probability and SER performance under the consideration of the loop interference. We then formulate the optimization problem based on the minimal SER criterion. Analytical and numerical results show that optimized relay location and power allocation can greatly improve system SER performance with the same total transmit power and loop interference level. In particular, the performance floor caused by the residual loop interference can be completely eliminated with joint relay location and power optimization.