Analysis of Carrier Aggregation as a Diversity Technique for Improved Spectral Efficiency and Secrecy Performance in Mobile Communications

Adamu, Paul Ushiki ORCID: 0000-0002-6131-5351 and López-Benítez, Miguel ORCID: 0000-0003-0526-6687 (2024) Analysis of Carrier Aggregation as a Diversity Technique for Improved Spectral Efficiency and Secrecy Performance in Mobile Communications. Telecom, 5 (1). pp. 255-279.

Text
Telecom_2024.pdf - Author Accepted Manuscript
Available under License Creative Commons Attribution.
Download (2MB) | Preview

Official URL: http://dx.doi.org/10.3390/telecom5010013

Abstract

<jats:p>Carrier aggregation (CA) was introduced in mobile communication systems in response to the demand for higher network capacity. CA was conceived as a technique to achieve higher data rates by aggregating multiple blocks of spectrum from the same or different frequency bands. This work explores a different point of view, where CA is employed not as a way to increase capacity through using more bandwidth, but as a diversity technique in order to increase the spectral efficiency of the existing spectrum, and therefore, achieve higher capacity without needing additional spectrum. A mathematical model and set of closed-form expressions are provided, which can be used to characterise the performance of CA as a diversity technique (in terms of both ergodic capacity and secrecy capacity) and determine the impact of various relevant configuration parameters. The numerical results obtained by evaluating the mathematical expressions derived in this work are in line with our previous simulation studies and demonstrate that CA can be effectively exploited as a diversity technique to improve the capacity and performance of mobile communication systems compared to the case of single-carrier transmission over the same amount of bandwidth.</jats:p>

Item Type:	Article
Divisions:	Faculty of Science and Engineering > School of Electrical Engineering, Electronics and Computer Science
Depositing User:	Symplectic Admin
Date Deposited:	14 Mar 2024 09:55
Last Modified:	16 Apr 2024 11:52
DOI:	10.3390/telecom5010013
Related URLs:	Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3179388