Millimeter-wave radar enters the 4D imaging era

By Alan Smith for Article Block – 4D imaging radar is a breakthrough technology that can extend the function of radar from measuring distance, speed, and horizontal azimuth to range, azimuth, and elevation angle under any lighting or weather conditions. In layman’s terms, compared with the existing traditional millimeter-wave radar, the resolution of 4D imaging radar in the horizontal and pitch directions has been greatly improved, so it can not only “understand” the horizontal plane, but also “understand” the vertical plane. , The real outline of the object detected in the front is drawn, so as to help the vehicle to judge whether it is driving “below” or “above” the object.

Why do you need 4D imaging radar?

Dr. Huang Mingda, the chief system architect of automotive electronics for NXP Semiconductors Greater China, pointed out in an interview with “Electronic Engineering Special” a few days ago that with the continuous improvement of autonomous driving levels, by 2023, about 60% of new cars will be assembled. radar.

“Why the automotive radar has such a high growth rate, I think it is due to the following two reasons: one is the promotion of national policies and regulations, and the other is the increasing application of radar.” Huang Mingda explained, for example, in 2018, If a new European car wants to meet the E-NCAP five-star standard, it must be equipped with an Automatic Emergency Breaking (AEB) system. China has put forward the same requirement in the 2020 C-NCAP standard; in 2021, the Japanese government will force all new cars to be equipped with forwarding AEB and backward reverse AEB systems; 20 American OEMs have recently signed agreements voluntarily in 2022 Ensure that all new cars are equipped with AEB systems; the European Union not only requires all new cars to be mandatory to install AEB systems in 2024 but also upgraded the evaluation specifications in 2020, stipulating that “AEB systems must be effective in low-light conditions.” Considering that the camera performance will decline in low light conditions, so the demand for radar from car manufacturers has increased significantly.

From the perspective of radar application scenarios, the L1 level currently needs to implement adaptive cruise control (Adaptive Cruise Control, ACC) or AEB functions. Such systems are usually equipped with a forward long-range radar and camera combination. A blind-spot detection system (BSD), lane change assist, and other functions require two rear-angle radars; at the L2 level, two additional front-angle radars are usually required to achieve forward crossing warning, AEB with steering, Automatic parking (APA), and other functions, and together with several cameras to achieve a 360-degree view of the vehicle… Full article