University of Würzburg
In this paper, the authors consider a multi-hop Wireless Sensor Network (WSN) with multiple relay nodes for each hop where the Amplify-and-Forward (AF) scheme is employed. They present a strategy to jointly design the linear receiver and the power allocation parameters via an alternating optimization approach that maximizes the sum rate of the WSN. They derive constrained Maximum Sum-Rate (MSR) expressions along with an algorithm to compute the linear receiver and the power allocation parameters with the optimal complex amplification coefficients for each relay node. Computer simulations show good performance of their proposed methods in terms of sum rate compared to the method with equal power allocation.