Evaluation of vehicular antenna concepts under delay limited capacity as performance measure for safety critical message transfer.

The delay-limited capacity (DLC) is introduced as a criterion for performance evaluation for future vehicular connectivity concepts with special focus on delay-critical message transmission. Upcoming connectivity standards rely on fail-safe operation and secure information exchange. For this reason, asymptotic performance measures like the ergodic capacity are not suited for system assessment as they do not guarantee that a data packet is transmitted successfully in a finite time frame. By utilizing the DLC for end-to-end analysis of a connectivity system, a future-proof method for performance evaluation in a city scenario is presented. A measurement campaign in a vehicular connectivity environment is provided for different antenna configurations. The effect of correlation on the DLC is analyzed theoretically and based on measurements by comparing a co-located vehicular multiple-input-multiple-output (MIMO) configuration with a side mirror MIMO antenna system.