Car-to-car communication is a growing field of research that holds out the promise of major new applications – such as cooperative exchange of information for the avoidance of accidents. All such applications depend on reliable and robust radio communication between vehicles. And the reliability of the wireless connection directly depends on the type and quality of the radio channel. A better understanding and realistic simulation of the dynamics of the wireless channel open the way to the adaptive design and the low-cost but accurate evaluation of future communication systems.

Our work is based on the measurement data furnished by the HHI Channel Sounder. This proprietary wireless channel measuring device has a measurement bandwidth of up to 1 GHz and a 2x8 MIMO antenna system which enable simultaneous measurement of multiple antenna positions as well as recording of directional channel measurement data from an antenna-array. Wireless channel measurements are complemented by ultra-precise position location and 360° video recording. In this way we can measure, evaluate and reprocess the radio channel in real-world traffic environments. 

Measurement data in Car2X communication scenarios are structured and serve as the basis for channel modelling which simulates the radio channel in line with given input values. The measurement data and channel model serve for a wide range of purposes.

For instance, they can be used in Matlab simulations to evaluate the performance of a communication system as per IEEE 802.11p. This allows for easy implementation of highly advanced signal processing algorithms such as Channel Tracking or MIMO techniques for investigation of potential under realistic conditions. The developed Matlab simulations are embedded in the widely used open source network simulator ns-3 in order to take full account of all layers through to the application. This means that we can factor in and realistically simulate the many aspects inherent in complex communication scenarios.

Measurement data and channel models are also used for the evaluation of hardware. Our Propsim F8 channel emulator can connect up to 8 communication modules and operate them as an ad-hoc network. This allows us to conduct realistic wireless channel benchmark tests for 802.11p communication hardware. Our own 802.11p FPGA implementation has successfully passed interoperability testing with devices of the market and is now able to communicate with commercial modules. 

We look forward to working with you to translate our research findings into your bespoke services.