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EC PROJECTS 79GHz


Band on the run A


Automotive radar on the move: the future is 79GHz band, says Davide Brizzolara


utomotive radar applications are evolving to achieve the long-term goal of accident-free driving. New and complex applications supporting this evolution


require short-range radars (SRR) able to meet very demand- ing requirements, such as higher range resolution and better object discrimination. Short-range radars in the frequency range 77-81GHz are


an ideal choice for the next generation of sensors supporting all the new requirements. For this reason, the 79GHz band was defined by the European Commission in 2004 as the fre- quency allocation for Automotive Short Range Radars (SRR) in order to support this automotive radar evolution; however in several countries it is not regulated. Car manufacturers and their suppliers operate on a glo-


bal scale. Segmentation of the overall market by country specific frequency variants increases the cost of production and reduces overall competitiveness. In parallel this market diversion handicaps the introduction of products that con- form to the already existing European frequency regulation for 79GHz automotive radar applications. In this context, the EU founded project 79GHz


(www.79ghz.eu) was launched to establish and speed up the worldwide-harmonised frequency allocation of 79GHz band to avoid jeopardising the use of the previously described high performance radar applications.


AUTOMOTIVE RADAR EVOLUTION: FROM COMFORT TO SAFETY With the evolution of radar applications, comfort func- tions giving indications to the driver (e.g. sound alert or visual warning), will evolve to safety functions that will automatically control the vehicle (i.e. act on the brakes or


Table 1: short-range radar automotive applications


79 GHz radar technology is seen as the next generation in the automotive radar development roadmap to meet high level requirements since it enables better performances to be achieved (as detailed in Figure 1).


Applications Adaptive Cruise Control (ACC) Sensor location: Comfort or


Front/rear or side? safety? Front


Collision Warning System (CWS) Front/Side Collision Mitigation System (CMS) Front/Side


Vulnerable Road User Detection (VUD)


Blind Spot Monitoring (BSD)


Front Rear


Lane Change Assistance (LCA) Rear Rear Cross Traffic Alert (RCTA) Front/Rear


Comfort / Safety


Comfort Safety


Safety


Comfort Comfort Comfort


Figure 1: Evolution of sensor performance


24


thinkinghighways.com


Vol 8 No 3 Europe/Rest of the World


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