Calterah’s automotive multi-mode mmWave radar reference design, empowered the Alps family of 77-GHz auto-grade and fully-integrated mmWave radar SoC chips, is system-level design that integrates the function of forward-looking radar and corner radar and offers 3 operation modes of LRR, MRR and SRR. This reference design enables real-time detection of objects in front of and beside the vehicle and provides their information with regard to range, relative velocity and azimuth, thus meeting the requirements of features like ACC (adaptive cruise control), AEB (automatic emergency braking), FCW (forward collision warning) and BSD (blind spot detection).
Calterah’s automotive multi-mode mmWave radar solution has the following features:
How It Works
The solution integrates two corner radar modules in the front and two in the back of the vehicle. It produces three kinds of beamforming corresponding to the three operation modes. In LRR Mode, by rotating the wave beam by 45°, the radar can detect long-range objects in the 12 o’clock and 6 o’clock directions. The three modes work by turns in the sequence shown below.
Working Sequence of the Three Modes
This figure shows the processing flow of the multi-mode radar.
The blue part represents the processings of RF and Baseband while the yellow part indicates those of the MCU for tracking.
The multi-mode radar solution provides adaptive tracking schemes to support cyclical tracking through fusion of data in different formats (2D, 3D), which improves robustness. It supports both signal-level and decision-making-level fusion for tracking and is suitable for detecting objects both in front of and behind a vehicle.