Joint Maximum Sum-Rate Receiver Design and Power Adjustment for Multihop Wireless Sensor Networks

TL;DR

This paper proposes a joint design method for linear receivers and power allocation in multihop wireless sensor networks using amplify-and-forward relays, aiming to maximize sum rate with improved performance over equal power schemes.

Contribution

It introduces a novel joint optimization approach for receiver design and power control in multihop WSNs, deriving maximum sum-rate expressions and an algorithm for optimal relay amplification.

Findings

Proposed method outperforms equal power allocation in sum rate.

Derived constrained maximum sum-rate expressions.

Algorithm effectively computes optimal receiver and power parameters.

Abstract

In this paper, we consider a multihop wireless sensor network (WSN) with multiple relay nodes for each hop where the amplify-and-forward (AF) scheme is employed. We 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. We 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 our proposed methods in terms of sum rate compared to the method with equal power allocation.