The Link11 Tactical data link simulation system is based on the open-source software GNU Radio and Matlab design simulation software and can work flawlessly on all SDR-LW series all-in-one models. It mainly realizes a series of simulations based on the Link11 transmission protocol, including simple Link11 signal modulation and demediation after receiving through the wireless air interface; radio silence mode of slave stations; polling call mode for master and slave stations based on configurable time windows and the number of devices.

Field deployment of the link11 simulation system

Block diagram of the simulation module

The main operating environment of this simulation software system:

1. Ubuntu operating system 18.04+

2、UHD 4.0+

3、Matlab 2021a

4、GNU Radio 3.9.2

The simulation system is divided into three modules (shown in the figure above), and only two RF channels of the SDR device are required for Link11 simulation, one transmit and one receive.

This experimental process fully simulates the Link11 protocol, supports both frequency division multiplexing and time division multiplexing communication, and can establish the master and slave station networking through wireless communication. This simulation system can complete practical exercises, simulation verification and other teaching activities. At the same time, the simulation system has the advantages of sustainable optimization and open-source software platform. The corresponding functions can be adjusted according to the needs of actual simulation teaching and research.