# Power Control Techniques for Interference Management-
## 2 Systematic Review Method
### Data Analysis and Synthesis  
The analysis was carried out using Bibliometrix. Bibliometrix is the most popular R package (version R-4.4.2) and is used in many publications. It allows R users to import a bibliography database from SCOPUS or the Web of Science, stored either as a Bibtex (.bib) or Plain Text (.txt) file. The network units of analysis for consideration to address the research questions (RQs) were bibliometric coupling (RQ1), citation analysis (RQ2), co-authorship (RQ3), and co-word analysis (RQ4), as shown in Table 4. \begin{table}
\begin{tabular}{l l l} \hline \hline
**Research Question (RQ)** & **Units of Analysis** & **Aim of the Analysis** \\ \hline \hline \multirow{5}{*}{RQ1: What are the current publication trends in power control techniques to address interference in 5G wireless networks?} & \multirow{5}{*}{Data overview} & To identify the main themes to quantify and visualize the thematic evolution of power control in 5G networks. The analysis focuses on citing documents [34] In addition, it helps us to understand the current state of the topic under study and to predict the direction of future research [35]. \\ \cline{1-1}  & & \\ \cline{1-1}  & & \\ \cline{1-1}  & & \\ \hline \hline \end{tabular}
\end{table} 
Table 4: Bibliometric units of analysis to address the research questions. As pointed out in [34], bibliometric coupling is a relationship measurement that occurs when authors cite the same author. When authors share a high number of citations, the bibliometric coupling between them is more substantial. According to [PERSON] and [PERSON] [38], in bibliographic coupling, a relationship is established by authors of the relevant publications instead of a co-citation analysis, where the relationship is amongst authors who cite the documents under consideration. The documents under investigation serve as the primary source for analysis [34]. The benefit of the analysis is twofold. Firstly, the critical themes extracted from the documents will help quantify and depict the thematic development of power control schemes in 5G networks. Secondly, it aids in predicting the course of future research and the state of the art of the subject under investigation [35]. The objective way to measure the quality of a research paper is through co-citation analysis. This measures the impact the research makes in a particular field or area. This translates into the interpretation of the following units of analysis, including journals, authors, documents, research institutions, and countries. The relationships among and leading publications are identified by undertaking the analyses. Furthermore, the analysis aids in identifying the trajectory of research ideas [39]. In this study, the trajectories concern the application of power control schemes in 5G networks. Co-authorship analysis assesses the relationships among authors and countries, their affiliations and other comparable effects on the advancement of the research area [40]. The analysis performed presents the following benefits. Firstly, scholars interact amongst themselves and, as a result, affect intellectual collaboration. This helps to advance knowledge in the area under study. Secondly, it informs the future development of the research field [41]. Co-word analysis is a method that looks at the actual content of the publication itself, using \"keywords\" as the unit of measure, as opposed to citation analysis, co-citation analysis, and bibliographic coupling, which use cited or cited publications as the point of analysis [42]. The keywords are frequently generated from \"author keywords.\" The examples shown by authors in [35] and [43] illustrate the application of co-word analysis. Like co-citation analysis, co-word analysis assumes that words frequently appear together and have a similar thematic relationship [44]. This analysis investigates the recurring themes in a research field and identifies possible future research directions.