Blockage at millimeter wave (mmWave) bands can cause severe loss in the received power which can result in link disconnection. In the vehicular environment, link blockage by neighboring vehicles can happen frequency and, depending on their relative speeds, blockage can last for multiple seconds. While these neighboring vehicles can act as blockers, they can also act as reflectors providing alternative paths in blockage scenarios. Thus, it is important to understand such paths. In this project, we investigate the utility of reflection paths off vehicles through mmWave channel measurements in a static setting. Preliminary results from our measurement campaign show that reflection losses depend on the transmit and receive antenna heights. When the transmit and receive antenna heights do not match, the reflection losses were high, but when they match the losses were within 5 dB from the received power of the line-of-sight paths.

Toyota Reflection Meas Setup3 Small