Three trends affecting the way automotive RF engineers test systems: Page 3 of 6

April 14, 2016 //By Franz-Josef Dahmen, Anritsu
Three trends affecting the way automotive RF engineers test systems
Today a car is far more than a means to move quickly and safely from A to B: it is a comprehensive living space in which we can be informed, entertained and productive just as effectively as when at home or in an office. All these electronic features have their specific needs and requirements for testing.
or malfunctioning RF system presents to the operation of the vehicle. They will need to exhaustively catalogue the failure modes of the radio. And they will then need to devise and document testing regimes that verify, with a very high level of confidence, both the risk of failure, and the way in which the radio will handle each failure mode.

 

In other words, the complexity and duration of RF tests will be far beyond those experienced by most RF engineers working in industry today.

 

Testing for dynamic network topologies

As has been shown, ADAS and driver information systems of various kinds are going to become increasingly important features in passenger vehicles. Today, these make considerable use of cameras. But in low visibility, for instance because of heavy rain or snow, their operation might be impaired. Even road markings might be impossible to see in snow or ice.

 

To provide supplementary or more reliable information about road conditions and the operation of the vehicle, car manufacturers are going to implement comprehensive C2I (Car-to-Infrastructure) and C2C communications systems, based on the IEEE 802.11 standards and mobile telephone technology.

 

Mobile telephone networks are useful for automotive communications because they already cover large parts of the globe, are highly standardised, and provide a robust communications link for fast-moving user equipment.

 

Legacy technologies such as 2G and 3G will be needed for in-car telephony, browsing the internet and the eCall (European) emergency communications system, described below. But their relatively low bandwidth and high latency make them unsuitable for real-time applications such as the control of autonomous cars. New mobile phone technologies however – LTE (4G) and 5G – will meet the requirement for real-time C2I communications.

 

In C2C communication, the technology for co-operative Intelligent Transport Systems (ITS) is derived from the IEEE 802.11 wireless local area networking (WLAN) standard which is also the basis for Wi-Fi. A specific frequency

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