Ambient BackCom in Beyond 5G NOMA Networks: A Multi-Cell Resource
Allocation Framework
Abstract
This article proposes a new resource allocation framework that uses the
dual theory approach. Specifically, the sum-rate of the multi-cell
network having backscatter tags and NOMA user equipments is maximized by
formulating a joint optimization problem. To find the efficient base
station transmit power and backscatter reflection coefficient in each
cell, the original problem is first divided into two subproblems and
then derived the closed-form solutions. A comparison with the orthogonal
multiple access (OMA) ambient BackCom and pure NOMA transmission has
been provided.