The main objectives of this project is to investigate the applicability and enumerate the potential gains of using Carrier Aggregation (CA) in satellite systems with taking into considerations the various nuances therein:
1. Define relevant scenarios for the possible implementation of CA schemes. The candidate scenarios can be characterized based on services, operational frequency bands, nature of CA (beam level, transponder level etc.).
2. Assessing the impact of CA schemes on the design and operation of gateway, payload and user terminal. The axes for impact analyses include hardware and processing complexity, modifications to existing standards and end-to-end system performance analysis.
3. Demonstrate and examine the performance of CA under different scenarios highlighting the implementation consequences on RF, PHY, MAC and link layers, where an end-to-end laboratory software-based testbed called “Carrier Aggregation Demonstrator (CAD)” is developed for this evaluation.
4. Based on the designing insights and the outcomes of the demonstration and testing, this project defines the technological roadmap to fill the gaps between the existing technologies and those of future that are needed for CA implementation.
Figure (1) Carrier Aggregation in GEO FSS forward link.
Figure (2) Multi‐Satellite CA (GEO‐GEO / MEO‐MEO / GEO‐MEO)