CADSAT

Carrier Aggregation in Satellite Communication Networks

Funded by: European Space Agency (ESA)

https://connectivity.esa.int/projects/cadsat

Project Objectives

Investigate and elaborate on the benefits and drawbacks of the application of the Carrier Aggregation (CA) technique through the development of a Software (SW)-based “Carrier Aggregation Demonstrator” (CAD) laboratory testbed.

My role:

One of the challenges during this project was establishing bi-directional links between the Tx and Rx; however, the existing implementation was capable of uni-directional (forward link only with DVB-S2X) traffic. Moreover, the testbed relied on synthetic data generated by MATLAB.
I developed a generic return link over the ethernet which allowed to bi-directional links between the Gateway and the User Terminal (UT). This enabled the testbed to run command applications such as iperf, ping, data streaming, etc.
I also developed a VPN-based framework that provides the user network entry point for launching the application which is mentioned above.
The source code for my contribution is free to use and can be downloaded here https://github.com/SumitSnT/Labview_Utilities

Figure-1: Carrier Aggregation Testbed without return link

This is the initial version of the testbed which has only unidirectional traffic capability.

Figure-2: Carrier Aggregation Testbed with Return Link facilitating Bi-Directional Traffic

In this version of the testbed, the red dashed lines are the return link which I implemented in LabVIEW. My implementation considers the CADSAT testbed (shown here as an orange block and represents the entire testbed which is shown in Figure 1) and provides a return link.

My implementation also includes a VPN-based framework providing a network entry point to launch applications.

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