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Advanced Driver Assistance Systems (ADAS) are a major focus of the current technological transformation in the automotive industry, which is moving towards higher levels of automation and autonomous driving. Powerful radar sensors, which equip vehicles with innovative features, are a key component of this transformation. For example, they can reliably identify objects or other road users in traffic, thereby playing a crucial role in future mobility safety. At the core of modern radar sensors is a powerful system-on-chip (SoC) – an integrated circuit that combines numerous electronic system functions into a single component. This approach offers decisive advantages: it enables the cost-effective production of powerful radar sensors.

According to foreign media reports, Bosch has now launched two new system-on-chip solutions: the SX600 and SX601, which support various advanced driver assistance functions compliant with SAE Level 2+ autonomous driving standards. For example, the automatic emergency braking function reduces the risk of rear-end collisions. Other applications include adaptive cruise control, driver blind spot object detection, and lane change assistance.

Bosch directly supplies semiconductors and sensors

‘Bosch has over 25 years of experience in radar sensor technology. With our advanced SoCs, we are committed to making driving more convenient and, more importantly, safer,’ said Peter Wolfangel, Executive Vice President of Bosch's Mobility Electronics Division. Automotive customers and dealers can purchase these SoCs directly from Bosch.

High-resolution and long-range detection, even for small objects

Both new chips feature a fully digital fast-response phase-locked loop (PLL), a control circuit that uses digital components to adjust the frequency and phase of the output signal to match the frequency and phase of the input signal. As a result, the digital PLL is more precise, flexible, and easier to integrate than an analogue PLL. It can generate highly flexible output signals and achieve long-range and high-resolution detection. The integrated radar receiver offers a high dynamic range, optimising object recognition and enabling the sensor to achieve high sensitivity even for small and distant targets. Its error rate is also significantly lower than that of other radar sensors.

This advanced radar detection technology inevitably requires more powerful computing capabilities. Bosch manufactures these two new radar SoCs using 22-nanometre RF CMOS technology. This cutting-edge semiconductor technology enables the SoC to achieve full integration at low cost, with a detection range approximately 30% higher than traditional sensors on the market. The multi-core subsystem provides ample memory and computational power, allowing customer functions to be directly integrated into the chip and leaving sufficient room for future expansion.

AI functionality based on neural networks

These chips are equipped with millimetre-wave (mmWave) sensor front-ends and powerful digital signal processors for traditional or AI-based data processing. This front end serves as the interface between the real world and digital processing, making it critical to the functionality and accuracy of the entire millimeter-wave sensor system. Its powerful computational capabilities support complex recognition algorithms and AI based on neural networks. These advanced features enable ADAS systems to reliably distinguish between pedestrians and other objects. Bosch provides a配套 engineering environment to simplify the implementation of machine learning applications.

Embedded compatibility technology for future innovation

The SX600 and SX601 operate at a frequency band of 77 GHz. Both SoCs are equipped with CAN XL and Ethernet interfaces for flexible connection to vehicle systems. Hardware-based security accelerators and data encryption features prevent unauthorised access. The SX600 focuses on cost-effectiveness, while the SX601 offers larger memory and the most powerful computing capability currently available on the market. Both models are interchangeable, facilitating system upgrades. Each sensor is equipped with four transmit channels and four receive channels. For applications with higher requirements, Bosch offers a cascaded solution consisting of two interconnected chipsets. SX601 samples are now available to global customers for development and testing.