DoE-based Evaluation of the Impact of the Twisted-Pair-Cable Parameters on the Wireless Communication Performance

In the automobile industry world, connectivity and autonomous driving have become a new trend. The next generation of vehicles should support the new communication technologies for infotainment systems and streaming services. In addition, for the autonomous deriving, the vehicles should be equipped with advanced driving assistance device and high-speed network. That is why the requirements for ensuring high performance and robustness especially of the wireless communications systems in modern connected vehicles are significantly greater compared to systems from even a couple of years ago. The electronic devices and the data network in the vehicle emit electromagnetic interference and can disturb the communication systems. This paper presents a calculation approach to evaluate the electromagnetic field radiated from a twisted pair cable. Based on an equivalent wire model, we calculate wire currents to perform the radiated electromagnetic field. Application of the Design of Experiment DoE approach can be used to analyze the influence of wire parameters and the results help to characterize the cable impedance. This enables the estimation of the Over-the-Air packet error rate obtained in a typical radiated test setup. The results can be used to evaluate the performance of the communication system in the early phase of vehicle project.