Automotive Radar is an Important Part of Autonomous Driving Systems

Automotive Radar
Automotive Radar

Unlike lidar, Automotive Radar has much more information to process than lidar, so fully autonomous vehicles require more accurate information from their radar sensor. Its output includes signal ratio data, range, azimuth, and elevation. For example, radar can detect objects on the road ahead of a driver's car and determine their distance and speed. These types of data are crucial for the host vehicle to make an informed decision about what to do next.

With the advancement of semiconductor technology, automobile radar sensors have become much smaller. Today's miniature 77-GHz radar sensors leverage silicon-germanium substrates. This makes them affordable enough for use in most new vehicles. The development of silicon-based mmWave technology has opened a new door for Automotive Radar. Silicon-based monolithic microwave integrated circuits are now being offered by many of the market leaders and smaller players alike.

The basic principle behind auto radar is that it uses chirp waveforms to distinguish objects at different angles. It is then possible to measure the angular dimensions of objects. In most cases, the speed of an object is proportional to the chirp time. In addition, the FFT of the IF signal determines range. The resulting data is then used for target detection. To improve their performance, automobile radars can now use artificial intelligence (AI) platforms to determine their speed, angular position, and angular distance.

Unlike conventional radars, Automotive Radar Market can detect objects at short ranges. The distances at which they can detect objects are typically less than 7 feet. The distance of the targets can be anywhere from 20 to 200 meters, depending on the chirp frequency. The chirp frequency and bandwidth are important factors in determining range resolution, and the angular resolution of the radar system are the major disadvantages of both types of systems. Advanced driver-assistance systems incorporating radar technology help to make driving safer. They allow drivers to take precautions before they get in an accident.

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