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NXP, Cohda Wireless RoadLINK achieves top performance in Audi field trial for intelligent, securely connected vehicles

At the conclusion of a field test in Ingolstadt, Germany, Audi said that the RoadLINK V2V communications technology from NXP Semiconductors and Cohda Wireless (earlier post) delivered excellent results in the reliability of wireless exchange of warnings, reception performance, and communication range in real traffic conditions and at high speeds. The RoadLINK chipset cut reaction time and communicated potential hazards and safety-critical scenarios significantly faster than conventional wireless technology.

In high-speed challenges, V2V-enabled Audi vehicles equipped with the NXP RoadLINK chipset drove towards one another at relative speeds of up to 500 km/h (311 mph), communicating across distances of more than two kilometers (1.24 miles).

The field test featured the intelligent roof antenna developed by Delphi, based on the NXP and Cohda Wireless RoadLINK chipset. An NXP hardware secure element was also used to protect the communications from manipulation and unauthorized tracking or data access.

The NXP RoadLINK chipset combined with the Delphi Automotive PLC roof antenna delivered the best results so far in our field tests. In challenging test environments, such as intersections in the forest (trees absorb wireless signals at 5.9 GHz), the range was better than the previously tested systems. The results demonstrate the benefit of combining NXP’s RoadLINK solutions with the circuit layout and design of the passive antenna emitters by Delphi.

—Aurel Papp, head of development EMC / Antenna Components, Audi AG

According to Audi, RoadLINK The V2V tests represent another significant milestone in the strategic partnership between Audi and NXP. In 2012, NXP and Audi signed a strategic innovation partnership agreement designed to accelerate the speed of automotive innovation and time to market—including V2V communications.

NXP, the world’s first supplier to deliver V2X (vehicle-to-vehicle and vehicle-to-infrastructure) chipsets for mass-production-ready secure connected cars, and Cohda Wireless, the world’s leading software supplier for IEEE 802.11p based communication, earlier joined forces to provide auto manufacturers with a range of V2X technologies that sets the benchmark for high performance, reliability and security.

NXP RoadLINK comprises two products:

  • SAF5100 – a flexible software-defined radio processor for V2V and V2I communication. The SAF5100 processor is fully programmable and can support unique algorithms to improve reception in wireless communication. The SAF5100 can support multiple wireless standards as well as different OEM antenna configurations like 802.11p antenna diversity, providing OEMs with the flexibility to support emerging standards across multiple regions via firmware updates.

  • TEF510x – a high-performance dual-radio multiband RF transceiver for V2X applications. Supporting global C2X and Wi-Fi standards, the TEF510x provides OEMs with an optimized solution to meet 802.11p modem functionality on one chip. The chip has the flexibility to support global deployments and various system configurations. The TEF510x RF transceiver meets Japanese 760Mz C2X requirements, US and European (5.9GHz) as well as Wi-Fi and DSRC (5.8GHz) specifications. It will be released for automotive production in 2015 and is expected to be available to consumers as early as 2016.


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