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

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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.

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October 2021

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A new software upgrade for the SL200 modem to maintain a control link in extreme conditions

June 2021

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Simpulse SDR (Software Define Radio) technology provides major enhancements to the SL200 modem. With this latest software update, the radio link will be maintained even under extremely difficult conditions.

The data-rate is now adapted to the transmission conditions. Under good conditions, the data-rate is maximum, and when conditions become difficult, the transmission rate gradually decreases to improve the robustness of the link.

Together with SIMPULSE’s unique process of data prioritization, while maintaining robustness for chosen high priority data, the data-rate can go down to:

- 600 kbps for commands, telemetry and a low-resolution live video for example

- Or even 170 kbps for critical data like commands/control and GPS coordinates

To give an idea, reducing the datarate from 5 Mbps to 170 kbps will multiply by 4 the distance range in Line-of-Sight. In the same way, the distance range and robustness are greatly improved for robotics under Non-LOS conditions.

More on SL200

New RSF200 ground antenna: Easy to use, embedding a SL200 modem

June 2021

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To complete our range of ground antennas, we introduce RSF200, the little sister of the GRS-T200 tracking ground antenna, targeting UAV / UGV usages for mid-range distances.

RSF200 is waterproof, dustproof (IP67) and can be mounted on a mast or a portable tripod. RSF200 is very quick to install: just mount the box on the tripod, screw the 2 antennas, and plug in the connection cable. No calibration or pointing is required.

Thanks to its high-sensitivity SL200 modem, the distance range can reach 20 km in Line-of-Sight (LOS) to transmit HD video, using a transmission power of only 500mW with the provided omnidirectional antennas.

This range can be extended to 40 km for low resolution video under the same conditions. Longer ranges can be achieved by using sector antennas (optional).

Download the RSF200 datasheet

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Updated GRS-T200 Datasheet Available

November 2020

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The GRS-T200 tracking ground station datasheet has been updated and is now available for download.

GRS-T200 is a tracking antenna which expands the range of action of SL200 embedded modem. Updates include the improvements brought by the last releases of the SL200 software, such as sensitivity, latency and available frequency bands.

Download the GRS-T200 datasheet

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