90 km range in high-speed radio link at sea

    December 2022

    Drone Boreal ISR

    The BOREAL ISR drone equipped with the SIMPULSE SL200 radio communication system, carried out a long-distance mission of more than 50 nautical miles (90 km) located off the French Atlantic Ocean coast. This project, as part of the RF100 program, started a few months ago with the goal to validate long-range video transmissions.


    Radio data transmissions in the maritime environment are usually affected by reflections on the surface of the water and by meteorological disturbances specific to this environment: the wave propagation conditions are considered as atypical compared to those in the terrestrial environment. These conditions cause weakening or even interruption of the radio signal.

    Therefore, long-distance flights over the seas require a very good knowledge of these phenomena and the solutions to be implemented. This is why the experienced BOREAL and SIMPULSE teams worked together to demonstrate the feasibility and validate long-distance radio ranges in these difficult environments.

    Simpulse GRS T200Thus, the BOREAL ISR drone, particularly suitable for long-distance missions, was operated with the SIMPULSE compact SDR radio technology on board which adapts its data rate to the propagation conditions, used in the SL200 on-board modem and the ground tracking antenna GRS-T200.

    An exhaustive data set was collected during this campaign on the transmissions propagation in the maritime environment. This collection enabled a detailed analysis of the atypical reflections phenomena and radio waves propagation for modeling them and optimize solutions to prevent them.

    Our drone has all the features to perform in the maritime environment. We are pleased to collaborate with SIMPULSE on this project that results a perfect knowledge of waves propagation phenomena in such complex environment" notes Michel Gavart, CTO of BOREAL SAS.

    Few months ago, the RF100 program overcame a first step in validating long-range radio transmissions in the terrestrial environment. The BOREAL UAV had successfully transmitted video data at maximum rate during a flight where the drone (embedded with SIMPULSE technology) and the ground station were separated by 110 km.

    "Our long partnership with BOREAL is essential to test and improve our products in difficult conditions, and we are happy to participate in the success of the BOREAL ISR drone" underlines Emmanuel Hamman, President of SIMPULSE.

    From now on, very large-scale missions involving a high-speed radio link can be carried out, such as the surveillance of linear infrastructures, borders, and communication routes, industrial and/or sensitive sites, or the supervision of large maritime and fishing areas.

    Read the press release

    Simpulse SL200 achieved a video link over a distance of 110 km

    Mai 2022

    SL200 modem

    The two-way Simpulse SL200 radio link has once again demonstrated its capabilities in long distance missions.

    Integrated into a Boreal ISR drone, The SL200 communicated continuously with the Simpulse GRS-T200 tracking station placed at a distance of 110 km

    While a Boreal team was operating the drone on its testing ground in the Toulouse surburds, another team had placed the GRS-T200 tracking antenna at the Pic du Midi observatory , at an altitude of 2877m, to ensure Visual Line Of Site conditions over at least 110 km. The transmitted video came from the optronic camera of the drone.

    The Boreal and Simpulse teams successfully demonstrated the transmission of the real-time video stream carried out without interruption througout the 2 hours of flight.

    More on Boreal : www.boreal-uas.com

    More on SL200           More on GRS-T200

    New integration of Simpulse SL200 radio modem in an avionics system for drones

    April 2022

    SL200 modem

    Simpulse SL200 modem is designed to be easily integrated into any air, land or sea vehicle requiring a reliable long range radio link.

    Aeromapper, which designs and manufactures high-performance UAV's and drone avionics systems, has successfully integrated the SL200 radio modem into its drone solutions.

    With Simpulse technology, Aeromapper drones can offer long range characteristics, allowing to keep a video link over 100 km.

    More on Aeromapper : www.aeromapper.com

    More on SL200

    Simpulse joins ADIF (Association of Drones of French Industry) and the European federation DRONES4SEC

    March 2022

    SL200 modem

    ADIF (Association des Drones de l’Industrie Francaise) is a professional federation representing the French drone sector. Simpulse, through its membership, brings its know-how in terms of radio communication to this ecosystem having a strong economic potential.

    Simpulse has also joined Drones4sec, the European federation of security drones, to take over the presidency of the "communication component" college, and thus promote innovation and intra-European technological cooperation.

    More on ADIF : www.adif.aero

    More on Drones4sec : www.drones4sec.eu

    SIMPULSE, in collaboration with INTRA Group, demonstrates the capabilities of its SL200 radio link to greatly extend the intervention area of remotely operated robotic systems

    October 2021

    Datasheet preview

    During an operation conducted in collaboration with INTRA Group, intervention group that can be mobilized in case of nuclear accident with dedicated robots, SIMPULSE’s SL200 radio link maintained the video transmission in an area 4 times larger than the nominal one. Usually, in conventional digital transmission systems, a sudden link break occurs when the nominal coverage is exceeded. 

    During tests in a rural environment in collaboration with the INTRA Group, SIMPULSE has proven the effectiveness of its SL200 radio link applied to terrestrial robots. For INTRA Group's remotely operated applications, transmitting video is the main function of a radio link. It is essential for exploring the site, for manipulating objects, as well as for piloting and guiding the robot. The risk identified is losing the use of the robot when it exceeds the range of the radio link.

    In conventional digital transmission systems, the link is suddenly broken as soon as the limit of nominal coverage is exceeded. SIMPULSE pushes back the limits of this technology by implementing in its products a behavior similar to analog systems without abrupt cut-off: when the vehicle leaves the nominal transmission area, a lower data-rate and more robust radio link is maintained. This link is used for the transmission of a context video at lower resolution that allows to continue the mission. The intervention area can thus be multiplied by 4.

    Beyond that area, when the video can no longer be transmitted, a very robust and lower data-rate link is still ensured, with transmission of GPS coordinates and commands & control of the vehicle. It is thus possible to drive the machine back to the nominal coverage area.

    “The result of this test allows us to consider setting up very long-distance video links with a very robust transmission link. It is a strategic point for the INTRA Group. » noted the Expert Engineer of the INTRA Group.

    “INTRA Group's robotics expertise has enabled us to demonstrate the unrivaled robustness of our radio link in extreme conditions, and to adapt our technology to these environments." points out Emmanuel Hamman, CEO of SIMPULSE.

    Read the press release