부산대학교 도서관

A new reproducible semi-virtual drive test is presented for characterization of microwave-antenna systems in noisy fading scenario for inter-vehicle communication C2C/C2X at 5.9 GHz. Channel data is generated using a ray-tracing tool where measured or simulated diversity- or MIMO-antenna elements are used as transmit or receive antennas in a user-defined 3D virtual city model. To take care of effects provoked by intersymbol-interference a further quasi-deterministic noise model is used for estimation of the noise floor. The simulated channel and noise data is imported into a vector signal generator where the RF channel is emulated in a hardware measurement setup which forms a real C2C/C2X transmission system where the test drive is performed at 5.9 GHz in the laboratory. On base of the data of two antennas mounted underneath the roof of a car, the performance of a switch diversity prototype is evaluated as a device under test which is inserted into the hardware transmission system. Results are showing a significant increase of received signal strength and a strong decrease of the package error rate by the antenna diversity in a noisy fading scenario.