Simpulse Puts SDR Back in the Spotlight: Redefining Communication Systems

    November 2023

    With SDR technology Simpulse can update software within seconds, adjusting transmission characteristics, adding functions like mesh network compatibility, and enhancing resistance to jamming.

    Leading developer of high-performance, long-range radio data links Simpulse explores how SDR technology is poised to revolutionize the approach to communication systems in critical environments.

    Professional Wireless radio communications are the backbone of modern society, with applications ranging from transportation, public safety, to space and defense. These systems must withstand the harshest conditions and threats, such as frequency congestion, difficult propagation or jamming.

    Traditional communication technologies like 4G, 5G, and Wi-Fi, while excellent for general public use, fall short in meeting the stringent security and reliability requirements of these critical applications. To bridge this gap and provide a solution that can adapt swiftly without exorbitant resource allocation, Software Defined Radio (SDR) technology is making a remarkable comeback.


    What is SDR?

    Software Defined Radio, or SDR, has been in existence for 30 years. While it has been a known technology, it is now re-emerging as the ideal solution for critical applications. SDR replaces traditional hardware radio components with software implemented on a programmable component. SDR hardware platforms may consist of either a powerful generic processor (GPP) or a specific programmable component like a Field-Programmable Gate Array (FPGA). The portion of analogue components remaining to generate the radio signal constitutes also an essential point. However, what sets SDR apart is the ability to run different software on the same hardware platform, offering diverse functions, characteristics, or performance levels.


    SL200 mobile radio modem s

    How Simpulse Leads the SDR Dynamic

    While the name suggests “Software Defined Radio,” the  underlying hardware platform remains pivotal. Simpulse has taken a pioneering approach by developing its own FPGA-based platform, uniquely tailored to the creation of high-performance radio links. Unlike conventional transmission standards, Simpulse proprietary robust waveforms are specially engineered to meet the demands of secure long distance. These waveforms are generated on the platform through software, providing flexibility and adaptability.

    To enhance efficiency further, Simpulse has crafted its own tools for generating waveforms and simulating signal processing algorithms. With SDR technology, the company can update software within seconds, adjusting transmission characteristics,

    adding functions like mesh network compatibility, and enhancing resistance to jamming. This level of control allows Simpulse to keep within a reasonable budget whilst maintaining sovereignty over its solutions, the heart of which are entirely engineered in France without reliance on foreign technologies.


    SDR’s Crucial Role in Critical Applications

    The resurgence of SDR technology is redefining the landscape of critical applications, from defense to space exploration, and even industrial scenarios. Traditional communication technologies lack the adaptability and flexibility required in these dynamic environments. SDR technology not only meets these challenges head-on but exceeds expectations with its capacity to deliver on-demand, secure, and reliable communication solutions.

    • In the industrial landscape, where robotics play a vital role, SDR opens new possibilities. It allows for efficient communication in environments that would otherwise hinder traditional radio technologies. Whether underwater, within nuclear enclosures, or amid frequency disturbances, SDR enables reliable and adaptable communication solutions.
    • In the space sector, the role of SDR is equally pivotal. Whether it’s the guidance of orbital launchers or the communication needs of satellite missions, SDR offers the flexibility needed to adapt to mission-specific requirements. With SDR, space agencies can save resources and increase mission success rates by reconfiguring communication systems as needed, ensuring they remain resilient to the harsh conditions of space.
    • In the defense sector, the ability to rapidly adapt radio communications to the changing conditions on the battlefield is a game-changer. Electronic warfare is a constant threat, and SDR allows for swift adjustments, ensuring military operations are not compromised. Furthermore, SDR’s adaptability ensures compatibility with the latest technologies, enabling seamless communication even in the most challenging scenarios.

    Simpulse’s groundbreaking work in the field of SDR technology is breathing new life into critical applications. By developing their own FPGA-based platform, crafting proprietary waveforms, and creating advanced tools for signal processing, Simpulse is at the forefront of SDR innovation. Their solutions address the pressing need for secure, reliable and adaptable communication systems in industrial sectors, public safety, space, and defense.


    As SDR technology takes center stage, it offers an unprecedented level of control and adaptability, making it an ideal choice for applications where traditional communication systems fall short. With Simpulse leading the way, SDR technology is poised to revolutionize the way we approach communication systems in critical environments, ensuring that they remain robust, secure, and efficient in the face of evolving challenges.

    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 :

    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 :

    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 :

    More on Drones4sec :