n Figure 11.14 shows the received power at the UE antennas, the achieved through- put with link adaptation when moving the UE through the office, and the resulting uncoded BER. The link adaptation including MIMO mode selection and MCS selection (with fixed code rate) was adapted for every radio frame (10 ms). From the logged bit-loading pattern per transmit antenna, we calculate the achieved © 2009 by Taylor & Francis Group, LLC Early Real-Time Experiments and Field Trial Measurements throughput within one TTI of 500 us per transmit antenna from the MCS used in each RB (note that 144 symbols per RB carry data): The results in Figure 11.14 show the throughput for each transmit antenna, considering a factor of 19/20 because TTI-0 was excluded from data transmis- sion. From the top plot in Figure 11.14, we observe that one Rx antenna "red" always receives about 5-0 dB less power than the second Rx antenna. This is easily explained by the fact that one antenna points more toward the BS and the other more to the wall. This situation is a natural situation for a multiantenna system with more or less arbitrary antenna positions in the room. In our indoor experi- ments, the received broadband power within the 20-MHz bandwidth for the two Rx antennas rarely differed by more than 10 dB due to the strong non-line-of-sight (NLOS) component. However, for a cellular outdoor scenario, this difference is expected to be significantly higher. The measurement track consisted of the first 60% of sample points* measured within the main lobe of the BS antennas while the UE moved from about 25-m start distance between UE and BS to almost 5 m before the main lobe was left (LOS ® NLOS). Although the received power stays almost the same, the rate drops significantly because the channel rank decreases for many RBs in the 2 x 2 antenna configuration. At about time slot 350, we leave the office through a door and continue behind a wall of steel cupboards. The received power drops by about 10 dB when we leave the office. Due to the higher rec