crease the bit rate for data communi- cation for single users or increase the system throughput in order to increase the overall spectral efficiency [2]. A key technology to provide this flexibility at reasonable costs in 3GPP LTE systems is multiantenna solutions at the terminal or base station [3,4]. The mul- tiantenna configuration can be used to increase the SNR and SIR using beam forming or different antenna diversity algorithms or utilized for higher throughput using partially uncorrelated transmission channels if multiple antennas are used at both base station and terminal-that is, MIMO (multiple input, multiple output) antennas. The use of more advanced antennas at the terminal and base station has been considered also for GSM and 3G for many years [5] but has not led to large © 2009 by Taylor & Francis Group, LLC Measuring Performance of 3GPP LTE Terminals deployments of terminals or base stations with advanced multiantenna solutions. One of the main reasons is the big difference in the required data rates between mobile broadband services such as 3GPP LTE compared to mobile telephony. In 3GPP LTE the bit rate in the down- and uplinks will be directly dependent on the available SNR/SIR received at the terminal from the base station and vice versa. In a GSM system, the SNR/SIR just has to be above a certain threshold value for the service to work. Even if there is a 20-dB extra link margin available-for example, due to smart antenna solutions-the bit rate will always be the same 9.6 kb/s in the up- and downlinks. Of course, the coverage will be better, but that does not affect the majority of users in urban areas and affects only a few users in rural areas. The business case for advanced antennas to extend the coverage for a few users in rural areas has, in most cases, not been good enough for the extra cost of using advanced antenna solutions. The business case for higher throughput and bet- ter spectral efficiency for all users is much better. For the new mobile broadband systems-HSPA, WIMAX, and 3GPP L