Figure 1
From: Experimental evaluation of the WiMAX downlink physical layer in high-mobility scenarios
Block diagram of the outdoor-to-outdoor measurement setup. The transmit antennas are placed outdoors, and the receive antennas are installed outside the car on its roof. The interpolator at the transmitter side and the decimator at the receiver side enable the recreation of high-speed conditions during low-speed experiments. The corresponding outdoor-to-indoor setup is basically the same. The only difference is that receiving antennas are placed inside the car instead of outside.