 be measured in the reverberation chamber [29,33]. In order to characterize both diversity and MIMO systems correctly, complete equivalent circuits of antennas are needed on reception (see Section 2.5 in Kildal [19]). © 2009 by Taylor & Francis Group, LLC Measuring Performance of 3GPP LTE Terminals Mobile terminals were initially characterized only on transmit, whereas in the last few years the receive function has gained more attention. This is characterized by the input signal level giving a certain specified bit error rate (BER) or frame error rate (FER) for code division multiple access (CDMA) systems. When averaged over directions in the radiation pattern, the limiting static signal level is referred to as the total isotropic sensitivity (TIS). An alternative in reverberation chambers is to measure BER/FER during continuous fading to determine what Kildal's group refers to as average fading sensitivity (AFS) [34]. The AFS can also be used to deter- mine the TIS because there seems to be a fixed, system-specific relation between the two values. The AFS is a more realistic performance parameter than TIS and can be measured much faster. The reverberation chamber needs further development, in particular in relation to controlling bandwidth and improving accuracy. The latter is needed in order to allow measurements of terminals for some wideband mobile communication systems. Therefore, in a research project we have developed a numerical model of the chamber to study accuracy in loaded chambers. The focus was not on detailed modeling of a specific real chamber but, rather, on defining a simplified numerical chamber that can be simulated much more efficiently and thereby is more conve- nient for studying fundamental properties of mode stirring and loading [35,36]. This work was supported by experimental work on chamber loading [23] and stud- ies of Hill's formulas for how loading affects the Q and average mode bandwidth [37]. At the moment, no one else in the world is able to do such extensive computa- tions on rev