Design, tune & test 24GHz radar solutions
For large European media broadcaster
Challenge
Project challenges included introducing radar technology, which was new to the customer in this consumer market segment. It was crucial to select a best-in-class radar device that offered the right features at an appropriate price point. However, no existing test processes were in place, necessitating the design and implementation of new testing methods.
We aimed to identify the optimal sensitivity threshold to detect a person sitting still in a room while avoiding false triggers from moving curtains, pets, and other disturbances.
Solution
After careful consideration, the solution involved partnering with a silicon vendor to use their 24GHz all-in-one highly integrated radar solution.
We developed bespoke test processes using innovative corner reflectors and turntables. A detailed study of the methods and standards led to an innovative approach to speed up regulatory compliance (without requiring a Notified Body).
The solution also required detailed knowledge of the silicon design, performing low-level register manipulations and tuning with appropriate scripting to enable access to all the device functionality, and utilising machine learning to classify humans/non-humans.
Learnings
This project provided numerous valuable learnings, including the operating and design principles of FMCW (Frequency Modulation Continuous Wave) radar.
We gained experience in the rapid development and integration of radar solutions into consumer-grade electronic products, as well as understanding radar-tuned range parameters such as angle and velocity through FFT, RF front-end settings, and chirp and frame configurations.
Additionally, we explored the application of machine learning for classifying humans and non-humans.
The significance of radar testing solutions for development, design verification, and compliance also emerged as an important takeaway from this project.
Impact and Value
This exciting project enabled us to gain new, reusable skills and methods. These skills included electronic design, software, customised device configuration, test and validation capability, and certificates.
Overall, the brief was demonstrably achieved to use the design in the customers’ products.
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