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Imec Adds Machine Learning to its 140GHz Radar Technology to Enable Intuitive Man-machine Interactions - A smart radar system for gesture recognition and non-contact vital signs monitoring - FutureSummits.com / imec-int.com
Imec Adds Machine Learning to its 140GHz Radar Technology to Enable Intuitive Man-machine Interactions

 

NewswireToday - /newswire/ - Leuven, Belgium, 2019/05/13 - A smart radar system for gesture recognition and non-contact vital signs monitoring - FutureSummits.com / imec-int.com.

   
 
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This week, at FutureSummits 2019 (futuresummits.com), imec, a world-leading research and innovation hub in nanoelectronics and digital technologies, presents a compact highly-sensitive 140GHz MIMO (multiple-input multiple-output) radar system. The MIMO setup is demonstrated for gesture recognition, supporting intuitive man-machine interactions. In addition, the ultra-fine resolution of this radar allows the detection micro-skin movements related to vital signs serving applications like non-contact driver monitoring or patient monitoring.

Key differentiators of imec’s 140GHz radar-on-chip prototype system are its small size and high radar performance in terms of resolution and motion sensitivity. The radar operates up to 10m range, with 15mm range resolution and 10GHz of RF bandwidth. Multiple antenna paths are incorporated to enable a complete (virtual) 1x4 MIMO configuration to achieve angular target separation. The transceiver chip features on-chip antennas, and are integrated in 28nm bulk CMOS technology, ensuring a low-cost solution at high volume production. These properties make the radar system particularly appealing for applications where high-precision, small-motion based detection is key.

By adding machine learning capabilities, imec has now demonstrated the feasibility of the radar to detect and classify small motions based on Doppler information.

“This opens new opportunities, for example, enabling gesture recognition for intuitive man-machine interactions”, adds Barend van Liempd, R&D manager at imec. “Think about the AR/VR space, where the new radar can support intuitive interaction with virtual objects. Gesture recognition can potentially also enable intuitive device control complementary to existing interfaces such as voice control or smart touch screens.”

Being insensitive to lighting conditions and preserving privacy (a radar can so far not recognize humans), a radar solution has particular advantages over other types of motion sensors, for example time-of-flight-based infrared cameras. And, being extremely compact, imec’s 140GHz radar system can be integrated invisibly in almost every device, such as laptops, smartphones or screen bezels.

Imec has developed a specific machine learning algorithm based on a multi-layer neural network including an LSTM layer and using supervised learning to train the inference model by using in-house labeled recordings of more than 25 people, including several captures for each of 7 different gestures. Against the experimental dataset, the model classifies the recorded 7 gestures and predicts the right gesture at least 94% of the time.

Aside from gestures, vital signs can also be measured with very high precision thanks to the high radio frequency. Therefore, the radar is an excellent candidate for in-car vital sign monitoring systems, to enable non-contact tracking of the driver’s state, e.g. to detect falling asleep, abnormal stress levels or possibly to prevent accidents due to acute health hazards, e.g. heart or epilepsy attacks. Another possible application is to monitor small children using motion and vital signs detection, even when the infant is covered by a blanket and asleep, e.g. to provide an alert in case a child is unintentionally left in a vehicle.

To enlarge data richness and spatial information, imec is currently building a 4x4 MIMO radar system, for which a new generation of radar chips is under development incorporating the TX and RX as separate chips. This will allow a greater flexibility in distributing the MIMO array elements across the available area. It will also be explored if the functionality of the standalone radar chips can be increased, to enable MIMO systems with even larger arrays of chips.

Imec’s 140GHz radar was developed in its open innovation R&D collaborative program on radar technology. Interested companies can partake in the program, or in a bilateral R&D project, or license the technology building blocks.

About imec

Imec (imec-int.com) is a world-leading research and innovation hub in nanoelectronics and digital technologies. The combination of our widely acclaimed leadership in microchip technology and profound software and ICT expertise is what makes us unique. By leveraging our world-class infrastructure and local and global ecosystem of partners across a multitude of industries, we create groundbreaking innovation in application domains such as healthcare, smart cities and mobility, logistics and manufacturing, energy and education.

As a trusted partner for companies, start-ups and universities we bring together more than 4,000 brilliant minds from over 97 nationalities. Imec is headquartered in Leuven, Belgium and has distributed R&D groups at a number of Flemish universities, in the Netherlands, Taiwan, USA, and offices in China, India and Japan. In 2018, imec's revenue (P&L) totaled 583 million euro.

Imec is a registered trademark for the activities of IMEC International (a legal entity set up under Belgian law as a "stichting van openbaar nut”), imec Belgium (IMEC vzw supported by the Flemish Government), imec the Netherlands (Stichting IMEC Nederland, part of Holst Centre which is supported by the Dutch Government), imec Taiwan (IMEC Taiwan Co.) and imec China (IMEC Microelectronics (Shanghai) Co. Ltd.) and imec India (Imec India Private Limited), imec Florida (IMEC USA nanoelectronics design center).

 
 
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Imec Adds Machine Learning to its 140GHz Radar Technology to Enable Intuitive Man-machine Interactions

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