Bluetest's reverberation chambers at their website (www. mobilelabelling.com) [11]. TCP is the average transmitted power over five commu- nication channels within one GSM or 3G band. Mobile phones with high TCP and low SAR (specific absorption rate), are recommended by TCO Development. The 3GPP has included measurements of UMTS (universal mobile telecom- munications system) terminals in reverberation chambers in the 3GPP TR 25.914 V7.0.0. technical report [12] as an alternative to measurements in anechoic cham- bers. In this report, basic parameters of reverberation chambers for measurements of the radio performance of a 3G terminal are described. The calibration of rever- beration chambers and the measurement method are described in some detail. CTIA (formerly Cellular Telephone Industries Association, now CTIA-The Wireless Organization [13]) has, since late 2007, worked to standardize measure- ments of TRP and TIS in reverberation chambers. Traditionally, all CTIA stan- dards for measurements of TRP and TIS of various wireless systems have been specified in anechoic chambers. Measurements of TRP and TIS of mobile terminals in anechoic chambers are described in reference 14. The new standard for TRP and TIS measurements in reverberation chambers is scheduled to be ready in 2009. In mid-2008, no standards existed to measure MIMO capacity, diversity gain, or system throughput for wireless devices; this includes the effects of multiantenna solutions, which can be significant in a reflective environment. The reverberation chamber is a very good candidate for a suitable reflective reference environment, where repeatable tests of these parameters can be done rapidly and with good accuracy. 12.1.4 Chapter Outline This chapter will use a hands-on approach and start by reviewing basic properties of reverberation chambers and giving an overview of ongoing research and benchmark- ing activities. It will then describe how to calibrate reverberation chambers and how they are used to measure antenna efficiency, TRP, and TIS-i