VAYYAR 4D IMAGING RADAR

Recently, we have showed how radar technologies are useful for the automotive industry, when we dove into the Antenna-On-Package mmWave Sensor from Texas Instruments. As a refresher, more precise radars can be put into great use in the vehicles. Further enhanced seatbelt reminders, enhanced children detectors, better airbag deployment and intruder alert are some of the key advantages. Today, we will take a similar route (pun not intended), by overviewing Vayyar’s 4D imaging radar, which has the premise to cut down costs and complexity, while not compromising on safety.

Your first question might be what is perceived of a 4D imaging radar. Let us start with that. Us, humans, can only see three dimensions. Electronics do not have such limitation. Usually, radars, use a moving antenna to examine the environment and extract 3 dimensions from it: azimuth, elevation angle and speed of objects. By adding the Doppler effect to the mix, you can detect if an object is moving towards or away from you, creating this fourth dimension, time. What this means? Better mapping of the environment.

Now that we have that out of the way, we will see how Vayyar takes things to a whole new level. Common radar solutions utilize a small number of antennas for sending (2-3) and receiving (3-4) the signals. They have increased the number to a staggering MIMO array of 48 antennas, which in practice yields a high-resolution mapping of the radar’s surroundings. But it does not end there: they paired it with an ultra-wide azimuth-elevation field of view, making an incredibly accurate 4D point cloud that can differentiate children, adults and objects in car seats, automate emergency braking, assist with parking and even tracking your breathing, and since it does not use cameras, your privacy is not a concern. Overall, it has the ability to replace around 26 sensors in a car, in such a small form factor.

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